CN107342108A - Electrically programmable fuse system and its method of testing - Google Patents
Electrically programmable fuse system and its method of testing Download PDFInfo
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- CN107342108A CN107342108A CN201610274388.3A CN201610274388A CN107342108A CN 107342108 A CN107342108 A CN 107342108A CN 201610274388 A CN201610274388 A CN 201610274388A CN 107342108 A CN107342108 A CN 107342108A
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C29/00—Checking stores for correct operation ; Subsequent repair; Testing stores during standby or offline operation
- G11C29/02—Detection or location of defective auxiliary circuits, e.g. defective refresh counters
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C29/00—Checking stores for correct operation ; Subsequent repair; Testing stores during standby or offline operation
- G11C29/70—Masking faults in memories by using spares or by reconfiguring
- G11C29/78—Masking faults in memories by using spares or by reconfiguring using programmable devices
- G11C29/785—Masking faults in memories by using spares or by reconfiguring using programmable devices with redundancy programming schemes
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Abstract
A kind of electrically programmable fuse system and its method of testing, wherein electrically programmable fuse system include：Logic control module, respectively the main programming module and redundancy programming module with Logic control module coupling；The Logic control module, suitable for inputting programming control signal, the primary input signal of control main programming module operation is produced according to programming control signal；And the main output signal of main programming module feedback is received, and when detecting the failure of main programming module programming, produce the redundant input signal of control redundancy programming module operation；The main programming module, suitable for receiving primary input signal, and enter programming state；And feed back main output signal to Logic control module；The redundancy programming module, suitable for receiving redundant input signal, and enter programming state；And feed back redundant output signal to the Logic control module.This invention simplifies input of the user to programming control signal, the yield of electrically programmable fuse system is improved.
Description
Technical field
The present invention relates to electrically programmable fuse technical field, more particularly to a kind of electrically programmable fuse system and
Its method of testing.
Background technology
Efuse (Electrically Programmable fuse, electrically programmable fuse) technology is to utilize metal
The technology that electromigration (EM) characteristic grows up, with traditional laser fuse (Laser Fuse) skill
Art is different, and Efuse technologies can be used for generating small more electric fuse (E-fuse) structures.At the beginning of electric fuse
Beginning resistance value very little, when there is high current to pass through electric fuse, electric fuse is blown, the multiplication of its resistance value.
The electric fuse being blown remains off permanent, and the electric fuse not being blown is still then conducting
State.Therefore, the storage element being made up of electric fuse is to judge whether electric fuse is blown to learn in it
The data of portion's storage.
Efuse technologies are mainly used in field repair chip, perform redundancy etc..With traditional laser fuse technology
Compare, Efuse technologies mainly have advantages below：First, it and the CMOS being widely used at present manufacture work
Skill is completely compatible, does not increase extra processing step, cheap；2nd, small volume, take smaller
Silicon area and higher flexibility can be provided, therefore be widely used in embedded system and once
During programmable storage is used；3rd, due to having used the polycrystalline silicon material extremely a kind of with mos gate, to future
Technology can contractility it is good；4th, Efuse technologies also have the function of completing field repair chip, make encapsulation
What is programmed afterwards is likely to become reality, and whether programs or test and all do not need special instrument, this
Efuse technologies is substituted the application of laser fuse completely, also expand the application of oneself.
Efuse systems are mainly made up of the peripheral circuit such as Efuse cell arrays and programming read-write.On the one hand, it is existing
The programming technique of some Efuse systems has strict timing requirements to input signal, and which increase user's
Difficulty, influence the yield of Efuse systems；On the other hand, Efuse units are due to technique or the original of programmed environment
Because also having a certain proportion of fraction defective, it is therefore necessary to increase Efuse redundancies (redundancy) programming mould
Block designs, and existing Efuse systems may require that user is inputted to redundancy programming module using identical signal
Program again.
However, prior art requirement carries out identical programming to Efuse cell arrays and redundancy programming module,
Therefore it is required that user inputs identical signal to Efuse cell arrays and redundancy programming module so that uses
The requirement that person inputs to signal is high, and when deviation occurs in signal input, the yield of Efuse systems will also become
It is low.
The content of the invention
The present invention is solved the problems, such as to be to provide a kind of electrically programmable fuse system and its method of testing, reduced defeated
The difficulty of the programming control signal entered, improve the yield tested electrically programmable fuse system.
To solve the above problems, the present invention provides a kind of electrically programmable fuse system, including：Logic control
Module, respectively the main programming module and redundancy programming module with Logic control module coupling；It is described
Logic control module, suitable for inputting programming control signal, control master is produced according to the programming control signal
The primary input signal of programming module operation；And the main output signal of the main programming module feedback is received,
And when detecting the main programming module programming failure, produce and control the redundancy programming module operation
Redundant input signal；Be further adapted for export programmed result, the programmed result be based on the main output signal or
The redundant output signal of the redundancy programming module feedback obtains, for indicating the electric erasable fuse system
Whether system programs success；The main programming module, suitable for receiving the primary input signal, and enter programming
State；And main output signal is fed back to the Logic control module, the main output signal is used to indicate
Whether the main programming module programs success；The redundancy programming module, suitable for receiving the redundant input
Signal, and enter programming state；And redundant output signal is fed back to the Logic control module, it is described
Redundant output signal is used to indicate whether the redundancy programming module programs success.
Optionally, the main programming module includes Efuse array elements, and the redundancy programming module includes
Efuse array elements, and the main programming module is identical with redundancy programming module.
Optionally, the main programming module is further adapted for：Receive the row compiling that the Logic control module provides
Address.
Optionally, the main programming module is further adapted for：Programmed successively to being arranged corresponding to row compiling address
Each row of address are operated, and all row of address are compiled to know the main programming module in the row
Whether program address programs success.
Optionally, the main output signal sign main programming module is to program successfully, or, the redundancy
Output signal sign redundancy programming module is when programming successfully, the programmed result of output indicates electrically erasable
Except fuse system programs successfully.
Optionally, the programming control signal includes：Actual program time and programming data.
Optionally, the Logic control module is further adapted for, and exports outer logo signal, the outer logo
Signal is suitable to identify the programming state of the main programming module and the programming state of redundancy programming module；Institute
State Logic control module to be further adapted for, export handshake, the handshake is suitable to mark electric erasable and melted
Whether silk system is in programming state.
The present invention also provides the method for testing of a pair of electrically programmable fuse systems, including：Receive programming Control
Signal；The primary input signal of control main programming module operation is produced according to the programming control signal, it is described
Main programming module enters programming state；The main output signal of the main programming module feedback is received, and is judged
Whether the main programming module programs success, and the main output signal is for indicating the main programming module
It is no to program successfully；When detecting the main programming module programming success, programmed result is exported；Work as detection
When failing to the main programming module programming, the redundant input signal of control redundancy programming module operation is produced,
The redundancy programming module enters programming state；Receive the redundancy output letter of the redundancy programming module feedback
Number, and programmed result is exported, wherein, the redundant output signal is used to indicate the redundancy programming module
Whether programming is successful, and the programmed result is used to indicate whether the electric erasable fuse system programs success.
Optionally, before the main programming module enters programming state, the primary input signal controls institute
Stating the operation of main programming module progress also includes：The main programming module enters reading state, described in reading
The state of main programming module, and judge whether the main programming module carried out programming；It is described when detecting
When main programming module carried out programming, terminate the operation to the main programming module；When detecting the master
When programming module did not carried out programming, the main programming module is set to enter programming state.
Optionally, after the main programming module terminates programming state, whether judge the main programming module
Before programming successfully, the state of the main programming module is read；The shape of main programming module based on the reading
State, obtain the main output signal of the main programming module feedback.
Optionally, the redundancy programming module reads the redundancy programming module after programming state is terminated
State, it is anti-to obtain the redundancy programming module and the state of the redundancy programming module based on the reading
The redundant output signal of feedback.
Optionally, when the main output signal indicates the main programming module programming success, or, it is described
When the redundant output signal sign redundancy programming module is programmed successfully, the programmed result indicates the electricity
The success of erasable fuse System Programming.
Compared with prior art, technical scheme has advantages below：
In the technical scheme of electrically programmable fuse system provided by the invention, including with main programming module and
The Logic control module of redundancy programming module coupling, the Logic control module produce control main programming module
The primary input signal being programmed, and when detecting the failure of main programming module programming, based on the chief editor
The main output signal of journey module feedback produces the redundant input signal of control redundancy programming module operation, makes superfluous
Remaining programming module enters programming state.Therefore electrically programmable fuse system provided by the invention is tested
When, user only needs to input programming control signal by Logic control module, enables to main programming module
And redundancy programming module accordingly enters programming state, user is without defeated to the main programming module respectively
Become owner of programming control signal, input redundancy programming control signal to redundancy programming module, therefore reduce master
Programming control signal or the probability of redundancy programming control signal error, simplify input programming control signal
Difficulty, and then avoid and caused when testing electrically programmable fuse system because input signal malfunctions
Erroneous judgement, improve the yield of electrically programmable fuse system.
Further, the present invention is further adapted for reading main programming module before main programming module is programmed
Whether state, detection main programming module carried out programming, and avoided the main programming module from entering by mistake through programming mould
Formula, further improve the yield of electrically programmable fuse system.
The present invention also provides a kind of method of testing of electrically programmable fuse system, and user only needs input to compile
After process control signal, such as actual program time, programming data and row compiling address, the main programming mould
Block receives programming control signal, and enters programming state,；And automatically generated according to the state of main programming module
Redundancy programming control signal needed for redundancy programming module, until completing volume of being expert to the main programming module
The detection of address state is translated, reduces the difficulty that user inputs to programming control signal so that can to electricity
Need the programming control signal inputted to be simplified when programmable fuse system is tested, avoid due to making
User causes the erroneous judgement to electrically programmable fuse system to the error that programming control signal inputs, and improves
Test the yield of electrically programmable fuse system.
Brief description of the drawings
Fig. 1 is the Efuse IP of prior art Organization Chart；
Fig. 2 is the timing diagram of the Efuse systems of prior art；
Fig. 3 is the high-level schematic functional block diagram of electrically programmable fuse system provided in an embodiment of the present invention；
Fig. 4 is the circuit framework figure of electrically programmable fuse system provided in an embodiment of the present invention；
Fig. 5 is the functional block diagram for the main programming module that the present embodiment provides；
Fig. 6 is the functional block diagram for the redundancy programming module that the present embodiment provides；
Fig. 7 is the schematic flow sheet provided in an embodiment of the present invention tested electrically programmable fuse system；
Fig. 8 is the timing diagram of programming control signal provided in an embodiment of the present invention；
Fig. 9 surveys to be provided in an embodiment of the present invention to electrically programmable fuse system nominated bank compiling address
The schematic flow sheet of examination.
Embodiment
From background technology, prior art is to Efuse array elements and the input request signal of redundancy unit
It is high so that it is high to the accuracy requirement of signal input, and the yield of electrically programmable fuse system also needs to be carried
It is high.
With reference to figure 1, Fig. 1 is the Organization Chart of the Efuse systems of prior art, and the Efuse systems include：
Efuse array modules 10, the array being made up of multiple electric fuse Efuse units, it can be according to institute
The address signal of input is stated, finds out the electric fuse unit for needing to be operated automatically；
With the decoder module of the Efuse array modules 10 coupling, the decoder module is suitable to will input ground
Location is interpreted as the address corresponding with the electric fuse Efuse units in Efuse array modules 10, for pair
Efuse array modules 10 are read or positioning during programming operation.
Wherein, the decoder module includes X- decoder modules 11 and Y- decoder modules 12.For convenience
Domain arranges and placement-and-routing, and the efuse units in Efuse array modules 10 use the row of multiple lines and multiple rows
Row mode, therefore decoder module is divided into X- decoder modules 11 and Y- decoder modules 12, X- decoder modules 11
For inputting the row address for the Efuse array modules that read or program, Y- decoder modules 12 are used to input
The column address for the Efuse array modules for reading or programming.
With the logic module 13 of the Efuse array modules 10 coupling；With the Efuse array modules 10
The output module 14 of coupling.The logic module 13 is used to produce multiple control signal, including, read control
Signal RDEN, programming enable signal PGMEN and entrance programming signal AEN processed.
With reference to figure 2, Fig. 2 is the timing diagram of the Efuse systems of prior art, wherein, REND is high electricity
Usually, into read mode；When PGMEN is high level, Efuse array modules 10 enter programming mode,
Illustrate that Efuse array modules 10 possess program capability；PGMEN is high level, and AEN is high level
When, Efuse array modules 10 enter programming state, wherein, during high level of the AEN in a cycle
Between TPGMFor the programming time of reality.
Program address is inputted by decoder module, and can only once program a bit address, while each control letter
There are strict timing requirements between number.For redundancy programming module, redundancy programming module and Efuse
Array module is identical, and needs to complete the programming to redundancy programming module under identical control signal.
Therefore, prior art not only will accurately control the control signal being programmed to Efuse array modules,
It is also required to accurately control the control signal for being programmed redundancy programming module, therefore prior art is to control
The requirement of signal sequence is strict, and works as to go out between Efuse array modules and the control signal of redundancy programming module
During existing error, easily Efuse array modules are caused to judge by accident, for example, judging Efuse systems in a programming
To meet the requirements under address, and actually Efuse systems are failure under the program address.
To solve the above problems, the present invention provides a kind of electrically programmable fuse system, including：Logic control
Module, respectively the main programming module and redundancy programming module with Logic control module coupling；It is described
Logic control module, suitable for inputting programming control signal, control master is produced according to the programming control signal
The primary input signal of programming module operation；And the main output signal of the main programming module feedback is received,
And when detecting the main programming module programming failure, produce and control the redundancy programming module operation
Redundant input signal；Be further adapted for export programmed result, the programmed result be based on the main output signal or
The redundant output signal of the redundancy programming module feedback obtains, for indicating the electric erasable fuse system
Whether system programs success；The main programming module, suitable for receiving the primary input signal, and enter programming
State；And main output signal is fed back to the Logic control module, the main output signal is used to indicate
Whether the main programming module programs success；The redundancy programming module, suitable for receiving the redundant input
Signal, and enter programming state；And redundant output signal is fed back to the Logic control module, it is described
Redundant output signal is used to indicate whether the redundancy programming module programs success.
Electrically programmable fuse system provided by the invention, have and main programming module and redundancy programming module
The Logic control module of coupling, the Logic control module produce the master that control main programming module is programmed
Input signal, and when detecting the failure of main programming module programming, based on the main programming module feedback
Main output signal produces the redundant input signal of control redundancy programming module operation, enters redundancy programming module
Enter programming state.When therefore testing electrically programmable fuse system provided by the invention, user is only
Programming control signal need to be inputted by Logic control module, enable to main programming module and redundancy to program
Module accordingly enters programming state, and user to the main programming module without inputting chief editor's process control respectively
Signal, to redundancy programming module redundancy programming control signal is inputted, therefore reduce main programming control signal
Or the probability of redundancy programming control signal error, the difficulty of input programming control signal is simplified, and then keep away
When having exempted to test electrically programmable fuse system due to input signal malfunction and caused by erroneous judgement, improve
The yield of electrically programmable fuse system.
It is understandable to enable the above objects, features and advantages of the present invention to become apparent, below in conjunction with the accompanying drawings
The specific embodiment of the present invention is described in detail.
Fig. 3 is the high-level schematic functional block diagram of electrically programmable fuse system provided in an embodiment of the present invention.
With reference to reference to figure 3 and Fig. 4, Fig. 4 be Fig. 4 be the present embodiment provide electric erasable fuse system
Circuit framework figure.The electrically programmable fuse system includes：
Logic control module 101, respectively the main programming module 102 with the Logic control module 101 coupling
And redundancy programming module 103；
The Logic control module 101, suitable for inputting programming control signal, according to the programming control signal
Produce the primary input signal of the operation of control main programming module 102；And receive the main programming module 102
The main output signal D11 of feedback, and when detecting main 102 program fail of output module, produce
The redundant input signal for controlling the redundancy programming module 103 to operate；It is further adapted for exporting programmed result D,
The programmed result D is fed back superfluous based on the main output signal D11 or described redundancies programming module 103
Remaining output signal D21 is obtained, for indicating whether the electric erasable fuse system programs success；
The main programming module 102, suitable for receiving the primary input signal, and enter programming state；And
Main output signal D11 is fed back to the Logic control module 101, the main output signal D11 is used to mark
Show whether the main programming module 102 programs success；
The redundancy programming module 103, suitable for receiving the redundant input signal, and enter programming state；
And feed back redundant output signal D21, the redundant output signal D21 to the Logic control module 101
For indicating whether the redundancy programming module 103 programs success.
The electricity provided the present embodiment below with reference to accompanying drawing can fuse system be described in detail.
The Logic control module 101, for producing control main programming module 102 and redundancy programming module
The programming control signal of 103 modes of operation, main programming module 102 is set to be in programming state or reading state,
Redundancy programming module 103 is set to be in programming state or reading state.
The Logic control module 101 is firstly adapted to the primary input for producing the operation of control main programming module 102
Signal.In the present embodiment, the primary input signal is firstly adapted to make main programming module 102 enter reading shape
State, the result of the reading state then detected according to the main programming module 102, judges whether to need
Produce the input signal for making main programming module 102 enter programming state；When detecting the main programming module
102 reading state controls the main programming module 102 to enter programming shape when not carrying out programming, to produce
The primary input signal of state.
The Logic control module 101 is further adapted for receiving the main output letter that the main programming module 102 is fed back
Number, and when detecting main 102 program fail of output module, produce and control the redundancy programming mould
The redundant input signal that block 103 operates.In other words, the Logic control module 101 receive it is described
When main output signal D11 sign main programmings module 102 program or program successfully, the logic control
Redundant input signal of the molding block 101 without producing the operation of control redundancy programming module 103, the redundancy
Programming module 103 is in a dormant state.
The Logic control module 101 is further adapted for output programmed result D, the programmed result D and is based on institute
The redundant output signal D21 that main output signal D11 or described redundancies programming module 103 feeds back is stated to obtain,
For indicating whether the electric erasable fuse system programs success.The main output signal D11 signs master
Programming module 102 is to program successfully, or, the redundant output signal D21 indicates redundancy programming module
103 is when programming successfully, the programmed result D sign electric erasable fuse systems of output program successfully.
Specifically, when the main output signal D11 of the main programming module 102 feedback indicates the main programming
Module 102 carried out programming when either program successfully or, the feedback of redundancy programming module 103
When redundant output signal D21 sign redundancies programming module 103 is programmed successfully, the programmed result D marks of output
Show that the electric erasable fuse system programs successfully, meet the requirements.When the main programming module 102 is fed back
Main output signal D11 indicate the program fail of main programming module 102, and the redundancy programming module
During redundant output signal D21 sign redundancy 103 program fails of programming module of 103 feedbacks, the volume of output
Journey result D indicates the electric erasable fuse system program fail, undesirable.The main output letter
Number D11 feeds back to the first feedback signal D1, the redundant output signal D21 of Logic control module 101
Feed back to the second feedback signal D2 of Logic control module 101.
The Logic control module 101 is further adapted for, and exports outer logo signal FLAG, the outer logo
Signal FLAG is suitable to the programming state and redundancy programming module 103 for identifying the main programming module 102
Programming state, whether mark main programming module 102 carried out programming or programmed succeeds, and mark is superfluous
Whether remaining programming module 103 programs succeeds；The Logic control module 101 is further adapted for, and exports letter of shaking hands
Whether number BUSY, the handshake BUSY are suitable to mark electric erasable fuse system in programming shape
State.
In the present embodiment, the programming control signal includes：Reset signal RESET, external timing signal
CLK, external programming enable signal PGMEN, outside enter programming signal AEN, and external programming is read
Signal RDEN, programming information signal A.
The reset signal RESET is suitable for Logic control module 101 and provides reset signal, removes logic
Sequential in control module 102, in the present embodiment so that low level resets as an example；
Input clock signal when the external timing signal CLK is programming, external timing signal CLK
Cycle be TCLK。
The external programming enable signal PGMEN is suitable to produce the of the operation of control main programming module 102
One programming enable signal PGMEN1, the first programming enable signal PGMEN1 are edited when being high level
Journey module 102 possesses program conditions, and the external programming enable signal PGMEN is further adapted for producing control
The second programming enable signal PGMEN2 that redundancy programming module 103 operates, the enabled letter of the second programming
Redundancy programming module 103 possesses program conditions when number PGMEN2 is high level.
In the present embodiment, the first programming enable signal PGMEN1 is suitable to transmit to main programming module 102
Main programming enable signal PGMEN11；The second programming enable signal PGMEN2 be suitable to transmit to
The redundancy programming enable signal PGMEN21 of redundancy programming module 103.
The outside enters programming signal AEN and entered suitable for producing the first of the operation of control main programming module 102
Enter programming signal AEN1, described first enters main programming module 102 when programming signal AEN1 is high level
Into programming state, the outside is further adapted for producing control redundancy programming module into programming signal AEN
Second entrance programming signal AEN2 of 103 operations, the second entrance programming signal AEN2 is high level
When redundancy programming module 103 enter programming state.
In the present embodiment, described first, which enters programming signal AEN1, is suitable to transmit to main programming module 102
Main enter programming signal AEN11；Described second, which enters programming signal AEN2, is suitable to transmit to redundancy volume
The redundancy of journey module 103 enters programming signal AEN21.
The external programming reads signal RDEN and is suitable to produce the first of the operation of control main programming module 102
Signal RDEN1 is read in programming, and first programming reads signal RDEN1 and is suitable to make main programming module 102
Into reading state, the external programming reads signal RDEN and is further adapted for producing control redundancy programming module
Signal RDEN2 is read in second programming of 103 operations, and second programming is read signal RDEN2 and is suitable to
Redundancy programming module 103 is set to enter reading state.
In the present embodiment, first programming reads signal RDEN1 and is suitable to transmit to main programming module 102
Main programming read signal RDEN11；Second programming reads signal RDEN2 and is suitable to transmit to redundancy
Signal RDEN21 is read in the redundancy programming of programming module 103.
In the present embodiment, the programming information signal A include row compiling address, the actual program time and
Programming data.The programming information signal A is suitable to produce control the main programming module 102 to operate the
One programming information signal A1, the first programming information signal A1 are suitable to the main programming module 102
Row compiling address, actual program time and programming data are provided；The programming information signal A is further adapted for
Produce the second programming information signal A2 for controlling the redundancy programming module 103 to operate, second programming
Information signal A2 be suitable to the redundancy programming module 103 provide row compiling address, the actual program time with
And programming data.
In the present embodiment, the first programming information signal A1 is suitable to transmit to the of main programming module 102
One programming information signal A11；The second programming information signal A2 is suitable to transmit to redundancy programming module
103 redundancy programming information signal A21.
It should be noted that in other embodiments, the programming control signal can also only include programming
Information signal, i.e., only include actual program time, programming data and go to compile address, reset signal,
External programming enable signal, outside reading control signal and external programming entering signal can be by logic controls
Molding block itself provides.
The main programming module 102 includes Efuse array elements, and the redundancy programming module 103 includes
Efuse array elements, and the main programming module 102 is identical with the redundancy programming module 103.Specifically
Into the present embodiment, the main programming module 102 is identical with the structure of the redundancy programming module 103,
So that under the conditions of identical input signal, the main programming module 102 and the redundancy programming module 103
Realize identical function.In other embodiments, the main programming module and the structure of redundancy programming module
It can be ensured with difference under the conditions of identical input signal, the main programming module is compiled with the redundancy
Journey module can realize identical function.
In the present embodiment, the primary input signal includes：First programming information signal A11, the first programming
Enable signal PGMEN11, first enter the programmings of programming signal AEN11 and first and read signal
RDEN11.The main programming module 102 is suitable to receive row compiling caused by the Logic control module 101
Address, obtained by the first programming information signal A11, main programming module 102 is carried out with knowing
The position of operation.
With reference to figure 5, Fig. 5 is the functional block diagram for the main programming module that the present embodiment provides.
The main programming module 102 includes：Programming unit 30, the programming unit 30 are suitable to receiving institute
Enter programming state after stating primary input signal；The second reading unit 31 being connected with the programming unit 30,
Second reading unit 31 is suitable to, and after the programming unit 30 terminates programming, reads the programming
The state of unit 30；The second judging unit 32 being connected with second reading unit 31, described second
Judging unit 32 is suitable to the state for receiving the second reading unit 31 read, and judges the programming unit
Whether 30 program success；The output unit 33 being connected with second judging unit 32, the output are single
Member 33 is suitable to feed back main output signal D11 to the Logic control module 101.
In order to avoid the main programming module 102 had carried out programming, the present embodiment before being detected
In, the main programming module 102 also includes：The first reading unit 34 being connected with the programming unit 30,
First reading unit 34 is suitable to, and after the primary input signal is received, reads the programming unit
30 state；The first judging unit 35 being connected with first reading unit 34 and output unit 33,
First judging unit 35 is suitable to the state for receiving the first reading unit 34 read, and described in judgement
Whether programming unit 30 carried out programming, terminated the operation to the main programming module when carrying out and programming,
When not carrying out programming, the programming unit 30 enters programming state.
In the present embodiment, the main programming module 102 is further adapted for：Receive the Logic control module 101
The row compiling address of offer；And successively to the row compiling address corresponding to row program address it is each arrange into
Row operation, all row program address of address are compiled to know the main programming module 102 in the row is
It is no to program successfully.
The main output signal D11 is used to indicate whether the main programming module 102 programs success.This reality
To apply in example, first judging unit 35 judges that the programming unit 30 carried out programming, or, institute
When stating the second judging unit 32 and judging that the programming unit 30 is programmed successfully, the main output signal D11
The main programming module 102 is indicated to program successfully；First judging unit 35 judges the programming unit
30 did not carried out programming, and when second judging unit 32 judges 30 program fail of programming unit,
The main output signal D11 indicates the program fail of main programming module 102.
Wherein, the main output signal D11 is suitable to transmit to the first feedback letter of Logic control module 101
Number D1, and Logic control module 101 is based on the first feedback signal D1 and redundancy output module 103 feeds back
The second feedback signal D2 outputs programmed result D.
It should be noted that when the main programming module 102 is in reading state or programming state, institute
State redundancy programming module 103 in a dormant state.That is, when the main programming module 102 is in
When reading state or programming state, the Logic control module 101, which will not produce, enters redundancy programming module
The redundant input signal of row operation.
The Logic control module 101 is receiving the main output signal of the feedback of main programming module 102
D11, and when detecting 102 program fail of main programming module, produce and control the redundancy programming mould
The redundant input signal that block 103 operates.In the present embodiment, the redundant input signal includes foregoing：
Second programming enable signal PGMEN2, second enters programming signal AEN2, and signal is read in the second programming
RDEN2, the second programming information signal A2.
With reference to figure 6, Fig. 6 is the functional block diagram for the redundancy programming module that the present embodiment provides.
The redundancy programming module 103 includes redundancy programming unit 40, and the redundancy programming unit 40 is suitable to,
Enter programming state after the redundant input signal is received；The redundancy programming module 103 also includes：
The redundancy reading unit 41 being connected with the redundancy programming unit 40, the redundancy reading unit 41
Suitable for after the redundancy programming unit 40 terminates programming, reading the state of the redundancy programming unit 40；
The redundancy determination unit 42 being connected with the redundancy reading unit 41, the redundancy determination unit 42 are suitable to
The state of the redundancy reading unit 41 read is received, and whether judges the redundancy programming unit 40
Program successfully；The redundancy output unit 43 being connected with the redundancy determination unit 42, the redundancy output are single
Member 42 is suitable to feed back redundant output signal D21 to the Logic control module 101.
The redundant output signal D21 is used to indicate whether the redundancy programming module 103 programs success.
In the present embodiment, when the redundancy determination unit 42 judges that the redundancy programming unit 40 is programmed successfully,
The redundant output signal D21 indicates the redundancy programming module 103 and programmed successfully；The redundancy determination
When unit 42 judges 40 program fail of redundancy programming unit, the redundant input signal D21 signs
The program fail of redundancy programming module 103.
Wherein, the redundant output signal D21 is suitable to transmit to the second feedback of Logic control module 101
Signal D2, and Logic control module 101 is based on the first feedback signal D1 and second feedback letter
Number D2 output programmed result D.
The electrically programmable fuse system that the present embodiment provides, including program mould with main programming module and redundancy
The Logic control module of block coupling, the Logic control module produce what control main programming module was programmed
Primary input signal, and when detecting the failure of main programming module programming, based on the main programming module feedback
Main output signal produce the redundant input signal of control redundancy programming module operation, make redundancy programming module
Into programming state.When therefore testing electrically programmable fuse system provided by the invention, user
Only need to input programming control signal by Logic control module, enable to main programming module and redundancy to compile
Journey module accordingly enters programming state, and user is without program control to main programming module input chief editor respectively
Signal processed, to redundancy programming module redundancy programming control signal is inputted, therefore reduce chief editor's process control letter
Number or redundancy programming control signal error probability, simplify input programming control signal difficulty, and then
Avoid when testing electrically programmable fuse system due to input signal error and caused by erroneous judgement, carry
The high yield of electrically programmable fuse system.
Accordingly, the present invention also provides a kind of method of testing of electrically programmable fuse system, with reference to figure 7, figure
7 be the schematic flow sheet provided in an embodiment of the present invention tested electrically programmable fuse system, including：
Step S10, programming control signal is received；
The programming control signal is provided by Logic control module, including programming information signal, such as row compiling
Address, actual program time and programming data；The programming control signal also includes：Reset signal,
External timing signal, external programming enable signal, outside enters programming signal, external programming reads signal.
In the present embodiment, the programming control signal is by outside input to Logic control module.At it
In his embodiment, part signal or whole signals in the programming control signal can also be by logic controls
Inside modules produce.
With reference to figure 8, Fig. 8 be programming control signal provided in an embodiment of the present invention in reset signal RESET,
External timing signal CLK, external programming enable signal PGMEN, external programming information signal A when
Sequence figure.The external programming enable signal PGMEN is by the low the first two clock cycle TCLK uprised
Acknowledging time, the acknowledging time are suitable to avoid entering by mistake through programming state；The external programming enable signal
During PGMEN the 3rd rising edge clock, actual program time T is inputted by the programming control signal,
The actual program time is main programming module or the programming time of redundancy programming module reality；Described outer
Portion programming enable signal PGMEN the 4th rising edge clock, is inputted by the programming control signal
Row compiling address addr；In the 5th rising edge clock of the external programming enable signal PGMEN,
Programming data data is inputted by the programming control signal.
Step S20, the primary input that the module operation of control main programming is produced according to the programming control signal is believed
Number, the main programming module enters programming state.
In the present embodiment, before the main programming module enters programming state, the primary input signal control
It is further comprising the steps of to make the operation that the main programming module is carried out：
Step S11, described main programming module enters reading state, reads the state of the main programming module；
After the state of the main programming module is read, into step S12, judge that the main programming module is
It is no to carry out programming.Fig. 7 is being represented to carry out programming with Y, is being represented not carry out programming with N.Work as inspection
When measuring the main programming module and carrying out programming state, terminate the operation to the main programming module, enter
Enter to follow-up step S40, output programmed result, then, carry out step S00, terminate to electrically programmable
The operation of fuse system；When detecting that the main programming module did not carried out programming, into step S20,
The main programming module enters programming state.
Step S30, the main output signal of the main programming module feedback is received, and judges the main programming mould
Whether block programs success.Represent to program successfully with Y in Fig. 7, program fail is represented with N.
The main output signal is used to indicate whether the main programming module programs success.In the present embodiment,
After the main programming module terminates programming state, judge whether the main programming module programs successfully before,
Read the state of the main programming module；And the state of the main programming module based on the reading, obtain institute
State the main output signal of main programming module feedback.
When detecting the main programming module programming success, into step S40, output programmed result.
Specifically, the main output signal of detection feedback, when the main output signal indicates the main programming mould
When block is programmed successfully, the programmed result indicates the electric erasable fuse system and programmed successfully.This implementation
In example, the main output signal feeds back to Logic control module, and the Logic control module is based on described
Primary input signal output programmed result.
When detecting the main programming module programming failure, into step S50, control redundancy programming is produced
The redundant input signal of module operation, the redundancy programming module enter programming state.
Specifically, the main output signal of detection feedback, when the main output signal indicates the main programming mould
During block program fail, the main output signal feeds back to Logic control module, and the Logic control module
The redundant input signal of control redundancy programming module operation is produced based on the main output signal, is made described superfluous
Remaining programming module enters programming state.
The redundant output signal of the redundancy programming module feedback is received, and enters step S40, input programming
As a result；Then, the operation into step S00, end to electrically programmable fuse system.
Wherein, the redundant output signal is used to indicate whether the redundancy programming module programs success, institute
Programmed result is stated to be used to indicate whether the electrically programmable fuse system programs success.The redundancy programs mould
Block reads the state of the redundancy programming module after programming state is terminated, and based on the superfluous of the reading
The state of remaining programming module, obtain the redundant output signal of the redundancy programming module feedback.
The redundant output signal feeds back to Logic control module, and the Logic control module is based on acquisition
Redundant output signal exports programmed result.
In the present embodiment, when the main output signal indicates the main programming module programming success, or,
When the main output signal sign main programming module carried out programming, or, the redundancy output letter
When number sign redundancy programming module program successfully, the programmed result sign electric erasable fuse
System Programming success.
In the present embodiment, the method for testing also includes, and exports outer logo signal, the outer logo
Signal is suitable to indicate the programming state of the main programming module and the programming state of redundancy programming module.With
Using binary system as outer logo signal exemplified by, when detecting that the main programming module carried out programming,
The outer logo signal of output is 2 ' b01 (with reference to figure 9)；When detecting main programming module programming success
When, the outer logo signal of output is 2 ' b10 (with reference to figure 9)；When detecting that the redundancy programming module compiles
When journey fails, the outer logo signal of output is 2 ' b11 (with reference to figure 9).
The method of testing also includes, and exports handshake, the handshake is suitable to the mark electricity can
Whether programmable fuse system is in programming state.When the handshake identifies the electrically programmable fuse system
When system is in programming state, any programming control signal is not received.Because main programming module includes efuse battle arrays
Row, and efuse arrays are arranged in a manner of multiple lines and multiple rows, therefore the programming control signal includes row and compiled
Address, the row compiling address, which is specified, to be tested a certain row of efuse arrays in main programming module, is wrapped
Include and all row of efuse array a line in the main programming module are tested.Specifically, the master
The operation that programming unit described in input signal signal is carried out includes：Operation to specifying program address, it is described
Specify n-th row program address of the program address for row compiling address, the operation of described pair of specified program address
Including：
The main programming module is set to enter programming state in the specified program address；In the main programming mould
Block judges the main programming module in the specified volume after the specified program address terminates programming state
Whether journey address programs success；
When detecting that the main programming module programs successfully in the specified program address, output programming knot
Fruit；
When detecting the main programming module in the specified program address program fail, the main programming
The main output signal of module feedback is suitable to make redundancy programming module receive redundant input signal, the redundancy
Programming module enters programming state in the specified program address.
Due to needing all row program address corresponding to the row compiling address to main programming module to test,
Therefore the method for testing also includes：
Judge whether the n-th row program address is Nth column program address, and N is the maximum of program address
Row；
Work as n<During N, control the main programming module to compile the (n+1)th row programming of address to the row and carry out
The operation of described pair of specified program address；
As n=N, the main programming module is controlled to terminate the operation to row compiling address.
Below by with specific embodiment to the side provided by the invention tested electrically programmable fuse system
Method illustrates.With reference to figure 9, Fig. 9 specifies to be provided in an embodiment of the present invention to electrically programmable fuse system
The schematic flow sheet that row compiling address is tested.
8 are shared to provide the program address of programming control signal and row compiling address using Logic control module
Exemplified by row program address, the maximum of row program address is classified as 7, described that electrically programmable fuse system is surveyed
The method of examination includes：
Step S01, reset signal is set, reset all signals of Logic control module.
It is exemplified by low level is reset by reset signal, it is 0 to set reset signal in the present embodiment.
Step S02, it is high level to set external programming enable signal, is inputted by programming control signal actual
Programming time, row compiling address and programming data.
In the present embodiment, exemplified by carrying out 8 data programmings.
Step S03, row program address is set.
In the present embodiment, so that the row program address ranks program address for 3 as an example.Row are set programmatically
Location is the 0th row program address, therefore subsequently carries out the 0th program address that address is compiled to the row
Operation to specifying program address.
Step S04, the state of main programming module is read, judges whether the main programming module carried out programming.
In Fig. 9, represent to carry out programming with Y, represent not carry out programming with N.
Specifically, read shape of the main programming module in the 0th program address of row compiling address
State, based on the state of the reading, judge whether the main programming module carried out programming.
According to the main output signal of the main programming module feedback to Logic control module, the chief editor is judged
Whether journey module carried out programming.In the present embodiment, during using the main output signal as 1, described in sign
Main programming module carried out programming；When not being 1 with the main output signal, the main programming module is indicated
Programming was not carried out.In other embodiments, additionally it is possible to using the main output signal as other reference values,
As judging whether the main programming module carried out the standard of programming, for example, working as the main output signal
For 2 when, indicate the main programming module and carried out programming, when the main output signal not be 2 when, mark
Show that the main programming module did not carried out programming.
When detecting that the main programming module carried out programming, the b01 of outer logo signal output 2 ',
Indicate 0th row program address of the main programming module in row compiling address and carried out programming, accordingly
The electrically programmable fuse system row compiling address the 0th row program address state to meet
It is required that.Meanwhile into step S00, the row for judging row program address whether be 7.
When detecting when being classified as 7 of the row program address, into step S000, terminate to compile the row
Translate 8 data programming of address.When the row for detecting the row program address are not 7, via step
S13 return to step S03, step S13 are, set being classified as the row program address to be compiled in the row detected
Add 1 on the basis of the row of journey address.
When detecting that the main programming module did not carried out programming, into step S05, to the main programming
Module is programmed.
Specifically, the 0th row program address of compiling address of being expert to the main programming module is programmed.
Then, into step S06, the state of the reading main programming module, the main programming module is judged
Whether programming is successful.In Fig. 9, represent to program successfully with Y, program fail is represented with N.
Specifically, read the main programming module be expert at compiling address the 0th row program address state.
In the present embodiment, during using the main output signal as 1, the main programming module programming success is indicated；With
When the main output signal is not 1, the main programming module programming failure is indicated.
When detecting the main programming module programming success, the b10 of outer logo signal output 2 ', phase
The electrically programmable fuse system answered is symbol in the state of the 0th row program address of row compiling address
Close and require.Meanwhile into step S00, the row for judging the row program address whether be 7.When detecting
When being classified as 7 of the row program address, into step S000, terminate to compile the row 8 of address
Data program.When the row for detecting the row program address are not 7, via step S13 return to step
S03, step S13 are, set the row base being classified as in the row program address detected of the row program address
Add 1 on plinth.
When detecting the main programming module programming failure, mould is programmed into step S07, to the redundancy
Block is programmed.
Specifically, the 0th row program address of compiling address of being expert to the redundancy programming module is programmed.
Then, into step S08, the reading redundancy programming module state, and judge that the redundancy is compiled
Whether journey module programs success.
Specifically, read the main programming module be expert at compiling address the 0th row program address state.
In the present embodiment, during using the redundant output signal as 1, indicate the redundancy programming module and program successfully；
When not being 1 with the redundant output signal, the redundancy programming module program fail is indicated.
When detecting the redundancy programming module program fail, the b11 of outer logo signal output 2 ',
The electrically programmable fuse system is in the state of the 0th row program address of row compiling address accordingly
It is undesirable, and return to step S00.When detecting that the redundancy programming module programs successfully, accordingly
The electrically programmable fuse system row compiling address the 0th row program address state to meet
It is required that and return to step S00.
Repeat the above steps, until judge when being classified as maximum column 7 of row program address, into step S000,
8 data for terminating to compile the row address program.
The method of testing provided in the present embodiment, user only need to input programming control signal, such as in fact
Behind border programming time, programming data and row compiling address, the Logic control module can automatically generate chief editor
Main programming control signal needed for journey module, and automatically generate redundancy programming according to the state of main programming module
Redundancy programming control signal needed for module, until completing compiling address shape of being expert to the main programming module
The detection of state, reduce the difficulty that user inputs to programming control signal so as to electrically programmable fuse
Need the programming control signal inputted to be simplified when system is tested, avoid because user is to compiling
Process control signal input error and cause the erroneous judgement to electrically programmable fuse system, improve test electricity can
The yield of programmable fuse system.
Although present disclosure is as above, the present invention is not limited to this.Any those skilled in the art,
Without departing from the spirit and scope of the present invention, can make various changes or modifications, therefore the guarantor of the present invention
Shield scope should be defined by claim limited range.
Claims (20)
- A kind of 1. electric erasable fuse system, it is characterised in that including：Logic control module, main programming module and redundancy respectively with Logic control module coupling are compiled Journey module；The Logic control module, suitable for inputting programming control signal, produced according to the programming control signal The primary input signal of raw control main programming module operation；And the master of the reception main programming module feedback is defeated Go out signal, and when detecting the main programming module programming failure, produce and control the redundancy programming mould The redundant input signal of block operation；It is further adapted for exporting programmed result, it is defeated that the programmed result is based on the master The redundant output signal for going out signal or redundancy programming module feedback obtains, for indicating the electrically erasable Except whether fuse system programs success；The main programming module, suitable for receiving the primary input signal, and enter programming state；And to The Logic control module feeds back main output signal, and the main output signal is used to indicate the main programming mould Whether block programs success；The redundancy programming module, suitable for receiving the redundant input signal, and enter programming state；With And redundant output signal is fed back to the Logic control module, the redundant output signal is described for indicating Whether redundancy programming module programs success.
- 2. electric erasable fuse system as claimed in claim 1, it is characterised in that the main programming module bag Efuse array elements are included, the redundancy programming module includes Efuse array elements, and the main programming Module is identical with redundancy programming module.
- 3. electric erasable fuse system as claimed in claim 1, it is characterised in that the main programming module bag Programming unit is included, the programming unit is suitable to enter programming state after the primary input signal is received；The main programming module also includes：The second reading unit being connected with the programming unit, second reading unit is suitable to, described After programming unit terminates programming, the state of the programming unit is read；The second judging unit being connected with second reading unit, second judging unit are suitable to receive The state of second reading unit read, and judge whether the programming unit programs success；The output unit being connected with second judging unit, the output unit are suitable to the logic control The main output signal of module feedback processed.
- 4. electrically programmable fuse system as claimed in claim 3, it is characterised in that the main programming module is also Including：The first reading unit being connected with the programming unit, first reading unit are suitable to, received To after the primary input signal, the state of the programming unit is read；The first judging unit being connected with first reading unit and output unit, described first judges Unit is suitable to the state for receiving first reading unit read, and judges whether the programming unit enters Went programming, when carrying out terminating the operation to main programming module during programming, when not carrying out programming, The programming unit enters programming state.
- 5. electrically programmable fuse system as claimed in claim 1, it is characterised in that the redundancy programming module Including redundancy programming unit, the redundancy programming unit is suitable to, and receiving, redundant input signal is laggard Enter programming state；The redundancy programming module also includes：The redundancy reading unit being connected with the redundancy programming unit, the redundancy reading unit are suitable in institute State after redundancy programming unit terminates programming, read the state of the redundancy programming unit；The redundancy determination unit being connected with the redundancy reading unit, the redundancy programming unit are suitable to receive The state of the redundancy reading unit read, and judge whether the redundancy programming unit programs success；The redundancy output unit being connected with the redundancy determination unit, the redundancy output unit are suitable to institute State Logic control module feedback redundant output signal.
- 6. electric erasable fuse system as claimed in claim 1, it is characterised in that the main programming module is also It is suitable to：Receive the row compiling address that the Logic control module provides.
- 7. electric erasable fuse system as claimed in claim 6, it is characterised in that the main programming module is also It is suitable to：Each row of row program address corresponding to row compiling address are operated successively, to obtain Know whether all row program address of the main programming module in row compiling address program success.
- 8. electric erasable fuse system as claimed in claim 1, it is characterised in that the main output signal mark Show main programming module to program successfully, or, the redundant output signal sign redundancy programming module is When programming successfully, the programmed result sign electric erasable fuse system of output programs successfully.
- 9. electric erasable fuse system as claimed in claim 1, it is characterised in that the programming control signal Including：Actual program time and programming data.
- 10. electric erasable fuse system as claimed in claim 1, it is characterised in that the Logic control module It is further adapted for, exports outer logo signal, the outer logo signal is suitable to identify the main programming module Programming state and redundancy programming module programming state；The Logic control module is further adapted for, defeated Go out handshake, the handshake is suitable to whether mark electric erasable fuse system is in programming state.
- A kind of 11. method of testing of electrically programmable fuse system, it is characterised in that including：Receive programming control signal；The primary input signal of control main programming module operation, the master are produced according to the programming control signal Programming module enters programming state；The main output signal of the main programming module feedback is received, and judges whether the main programming module is compiled Cheng Chenggong, the main output signal are used to indicate whether the main programming module programs success；When detecting the main programming module programming success, programmed result is exported；When detecting the main programming module programming failure, the superfluous of control redundancy programming module operation is produced Remaining input signal, the redundancy programming module enter programming state；The redundant output signal of the redundancy programming module feedback is received, and exports programmed result, wherein, The redundant output signal is used to indicate whether the redundancy programming module programs success, the programmed result For indicating whether the electric erasable fuse system programs success.
- 12. method of testing as claimed in claim 11, it is characterised in that enter in the main programming module and program Before state, the operation that the primary input signal controls the main programming module to carry out also includes：The main programming module enters reading state, reads the state of the main programming module, and judges institute State whether main programming module carried out programming；When detecting that the main programming module carried out programming, terminate the operation to the main programming module；When detecting that the main programming module did not carried out programming, the main programming module is set to enter programming State.
- 13. method of testing as claimed in claim 12, it is characterised in that terminate to program in the main programming module After state, judge whether the main programming module programs successfully before, read the shape of the main programming module State；The state of main programming module based on the reading, the master for obtaining the main programming module feedback are defeated Go out signal.
- 14. method of testing as claimed in claim 11, it is characterised in that the redundancy programming module is terminating to compile After journey state, the state of the redundancy programming module, and the programming mould of the redundancy based on the reading are read The state of block, obtain the redundant output signal of the redundancy programming module feedback.
- 15. method of testing as claimed in claim 11, it is characterised in that the main output signal indicates the master When programming module is programmed successfully, or, the redundant output signal indicates the redundancy programming module and compiled During Cheng Chenggong, the programmed result indicates the electric erasable fuse system and programmed successfully.
- 16. method of testing as claimed in claim 11, it is characterised in that the programming control signal includes row and compiled Translate address；The operation that the primary input signal controls the main programming unit to carry out includes, and is compiled to specifying The operation of journey address, the specified program address compiles the n-th row program address of address for row, described The operation for specifying program address is included：The main programming module is set to enter programming state in the specified program address；In the main programming mould Block judges the main programming module in the specified volume after the specified program address terminates programming state Whether journey address programs success；When detecting that the main programming module programs successfully in the specified program address, output programming knot Fruit；When detecting the main programming module in the specified program address program fail, the main programming The main output signal of module feedback is suitable to make redundancy programming module receive redundant input signal, the redundancy Programming module enters programming state in the specified program address.
- 17. method of testing as claimed in claim 16, it is characterised in that methods described also includes：Judge whether the n-th row program address is Nth column program address, and N is the maximum of program address Row；Work as n<During N, control the main programming module to compile the (n+1)th row programming of address to the row and carry out The operation of described pair of specified program address；As n=N, the main programming module is controlled to terminate the operation to row compiling address.
- 18. method of testing as claimed in claim 11, it is characterised in that the primary input signal and redundancy are defeated Enter signal to be provided by Logic control module, and the main output signal and redundant output signal are fed back to Logic control module；The Logic control module is based on the main output signal or redundant output signal is defeated Go out programmed result.
- 19. method of testing as claimed in claim 11, it is characterised in that the programming control signal also includes outer Portion programs enable signal, and the external programming enable signal is become the first two clock of high level by low level Cycle is acknowledging time, and the acknowledging time is suitable to avoid entering by mistake through programming state；The external programming 3rd rising edge clock of enable signal, the actual program time is inputted by the programming control signal, The actual program time is main programming module or the programming time of redundancy programming module reality；Described 4th rising edge clock of external programming enable signal, compiled by the programming control signal line of input Translate address；In the 5th rising edge clock of the external programming enable signal, controlled by the programming Signal processed inputs programming data.
- 20. method of testing as claimed in claim 11, it is characterised in that also include：Outer logo signal is exported, The outer logo signal is suitable to programming and the volume of redundancy programming module for identifying the main programming module Journey.
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| CN108665934A (en) * | 2017-04-01 | 2018-10-16 | 中芯国际集成电路制造(上海)有限公司 | The device and method that EFUSE is programmed |
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