JP2003043116A - Method, device, and program for writing program data of jtag chain connection type - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten a program data writing time for speedup of a writing process of the program data. SOLUTION: In this data writing method of a JTAG chain connection type program, program data are written in a plurality of program data writable JTAG chains C1 to Cn, in which a plurality of target devices T11 -T1k to Tn1 -Tnm are connected in series. First of all, one JTAG chain Ci is specified from a plurality of JTAG chains C1-Cn. Inside the specified JTAG chain Ci, the target device Tij is specified. The program data are fed only to the specified JTAG chain Ci to be written in the specified target device Tij .

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a JTAG chain connection type program data writing method for writing program data to a target device in a JTAG chain.
TAG chain connection type program data writing device and J
The present invention relates to a TAG chain connection type program data writing program.

[0002]

2. Description of the Related Art FIG. 3 shows a conventional program data writing device.
50 is shown. The program data writing device 50 performs various processes
Installed in equipment such as measuring equipment, inspection equipment, production equipment, etc.
Has been. Target device T (T₁, T₂, ..., T
_i, ..., T_n) Is a program such as FPGA, ROM, RAM
This is a medium that can be written with RAM data, and
Input device and output device are connected and connected in series.
Is made. Then, the target device T on the starting end side
₁Input section and the target device T on the terminal side_nOutput
Part is connected to the control part 52, and the JTAG chain C
Are configured. Each target device is stored in the storage unit 53.
Su T₁, T₂, ..., T_i, ..., T_nShould be written in
Various program data is the target device T₁, T
₂, ..., T _i, ..., T_nPosition data (each target data
Case with subscript numbers 1, 2, ..., I, ..., N) of vice
Has been paid.

From the input device 54, for example, position data i
When writing of specific program data accompanied by is specified, the control unit 52 reads out the specified program data from the storage unit 53, and the JTAG chain C
Send to. The transmitted program data is transmitted clockwise from the target device T ₁ on the starting end side to the target device T _n on the terminating end side, and written in the target device T _i that matches the accompanying position data i. .

[0004]

[Problems to be Solved by the Invention] However, JTA
The G chain is usually configured by connecting several to several thousand target devices T ₁ , T ₂ , ..., T _i , ..., T _n in series. Therefore, in the above-described conventional program data writing device 51, for example, when writing the program data to the i-th target device T _i , the program data designated for writing is written from the starting end side target device T ₁ to i-. It must be transmitted in the _first target device T _i-1 . In particular, each target device T ₁ , T ₂ , ..., _Ti ,.
Since the transmission data is temporarily held by the register provided in T _n , the more target devices T ₁ , T ₂ , ..., T _i-1 pass through, the target device designated for writing. It takes a huge amount of time to reach T _i , which is a problem.

Therefore, in order to solve the above problems, it is an object of the present invention to shorten the program data writing time and speed up the program data writing process.

[0006]

Next, means for solving the above problems will be described with reference to FIGS. 1 and 2 corresponding to the embodiment.
Will be described with reference to. JTAG chain connection type program data writing method of the present invention, writable plurality of target devices program data _{(T 11 ~T 1k), (} T
_{21 to} T _2l ), ..., (T _{i1 to} T _in ), ..., (T _{n1 to} T _nm ).
A plurality of JTAG chains C ₁ and C that are connected in series
_A JTAG chain connection type program data writing method for writing the program data in ₂ , ..., C _i , ..., C _n , wherein the plurality of JTAG chains C ₁ ,
_{C 2, ..., C i,} ..., from the C _n, identifies one JTAG chain C _i, the specified JTAG chain C _i
The target device T _ij in the
The program data is transmitted only to the TAG chain C _i , and the program data is written to the specified target device T _ij .

According to another JTAG chain connection type program data writing method of the present invention, a plurality of target devices (T _{11 to} T _1k ), (T
_{21 to} T _2l ), ..., (T _{i1 to} T _in ), ..., (T _{n1 to} T _nm ).
, Are connected in series, and each has a unique address. A plurality of JTAG chains C ₁ , C ₂ , ..., C _i ,.
Data storage means for storing file data consisting of _n , the program data, position data of the target device to which the program data is to be written, and address data of the JTAG chain including the target device 2 is a JTAG chain connection type program data writing method using, and receiving a program data write request, reading file data including the write-requested program data from the data storage means 2, The address data in the read file data is used as the JTAG chains C ₁ and C.
_2, ..., C _i, ..., sent in parallel to the C _n, receives the address data the sent only when the address with the address data matches, connected to the JTAG chain C _i that the match, the The connected JTAG chain C based on the position data in the read file data
The target device T _ij in _i is specified, the program data requested to be written is transmitted only to the connected JTAG chain C _i , and the program data requested to be written is connected to the target device T _ij. It is characterized by writing in.

According to still another JTAG chain connection type program data writing method of the present invention, a plurality of target devices (T _{11 to} T _1k ), (T
_{21 to} T _2l ), ..., (T _{i1 to} T _in ), ..., (T _{n1 to} T _nm ).
, Are connected in series, and each has a unique address. A plurality of JTAG chains C ₁ , C ₂ , ..., C _i ,.
Data storage means for storing file data consisting of _n , the program data, position data of the target device to which the program data is to be written, and address data of the JTAG chain including the target device 2 is a JTAG chain connection type program data writing method using, and receiving a program data write request, reading file data including the write-requested program data from the data storage means 2, The address data in the read file data is used as the JTAG chains C ₁ and C.
_{2, ..., C i, ...} , sent in parallel to the C _n, JTAG chain C having an address matching the address data
_{When i} is specified, the target device T _ij in the specified JTAG chain C _i is specified based on the position data in the read file data, and the writing is performed only in the specified JTAG chain C _i . The write-requested program data is transmitted, and the write-requested program data is written to the specified target device T _ij .

Another JTAG chain connection type program data writing device of the present invention is a control means 6 and a plurality of target devices (T ₁₁₎ provided in parallel with the control means 6 and capable of writing program data. ~ T _1k ), (T ₂₁
-T _2l ), ..., (T _{i1 to} T _in ), ..., (T _{n1 to} T _nm ) are connected in series and each has a plurality of JTAG chains C ₁ , C ₂ , ..., C _i. , ..., C _n
A data storage means 2 for storing file data including the program data, the position data of the target device to which the program data is to be written, and the address data of the JTAG chain including the target device. The control means 6 receives the program data write request, reads the file data including the program data requested to be written from the data storage means 2, and the read means. Address data sending means for sending address data in the file data to the JTAG chains C ₁ , C ₂ , ..., C _i , ..., C _n in parallel, and receiving the sent address data, Only when the addresses match, the connecting means for connecting to the matching JTAG chain C _i. And a JTAG chain C _i having an address matching the address data is specified, the target device T _ij in the specified JTAG chain C _i is determined based on the position data in the read file data. And the identified JTAG
Writing means for sending the program data requested to be written only to the chain C _i and writing the program data requested to be written to the specified target device T _ij .

[0010] Yet another JTAG according to claim 5 of the present invention.
The chain-connection type program data writing device is provided with a control means 6 and a plurality of target devices (T ₁₁ to Tw) provided in parallel with the control means 6 and capable of writing program data.
T _1k ), (T _{21 to} T _2l ), ..., (T _{i1 to} T _in ) ,.
(T _{n1 to} T _nm ) are connected in series and each has a plurality of JTAG chains C ₁ , C ₂ ,
, C _i , ..., C _n , the program data, the position data of the target device that writes the program data, and the address data of the JTAG chain including the target device. And a data storage means 2 in which is stored. The control means 6 receives a write request for the program data and reads file data including the program data requested to be written from the data storage means 2. The reading means and the address data in the read file data are transferred to the respective JTAG chains C ₁ , C ₂ , ..., C.
Address data sending means for sending in parallel to _i , ..., C _n , and J having an address that matches the address data
When the TAG chain C _i is specified, the target device T _ij in the specified JTAG chain C _i is specified based on the position data in the read file data, and the specified JTAG chain C _i is set. Writing means for sending only the program data requested to be written and writing the program data requested to be written to the specified target device T _ij , and the JTAG chains C ₁ and C _{2 respectively.} , ..., C _i , ..., C _n are
It is characterized in that it comprises connection means 3 for receiving the address data sent from the control means 6 and connecting to the control means 6 only when the address data and the address match.

Another JTAG chain connection type program data writing device of the present invention is a plurality of target devices (T _{11 to} T _1k ), (T
_{21 to} T _2l ), ..., (T _{i1 to} T _in ), ..., (T _{n1 to} T _nm ).
, Are connected in series, and each has a unique address. A plurality of JTAG chains C ₁ , C ₂ , ..., C _i ,.
File data including control means 6 in which _n is parallel, the program data, the position data of the target device to which the program data is to be written, and the address data of the JTAG chain including the target device are stored. The data storage means 2 is stored, and the control means 6 receives a request for writing the program data, and reads out file data including the program data requested to be written from the data storage means 2. Means, and the address data in the read file data to each of the JTAG chains C ₁ ,
C _2, ..., C _i, ..., and the address data sending means for sending in parallel to the C _n, when identifying the JTAG chain C _i having an address matching the address data, the read file data The target device T _ij in the specified JTAG chain C _i is specified based on the position data, and the specified JTAG chain C _i is specified.
writing means for sending the program data requested to be written only to _i and writing the program data requested to be written to the specified target device T _ij .

A further JTAG chain connection type program data writing program of the present invention is a plurality of target devices (T ₁₁ to
T _1k ), (T _{21 to} T _2l ), ..., (T _{i1 to} T _in ) ,.
(T _n1 ~T _nm) multiple JTAG chains, which are connected in series _{C 1, C 2, ...,} C i, ..., the program data JTAG chain connection type program data write program for writing in C _n In the computer, the plurality of JTAG chains C ₁ , C ₂ , ...,
From C _i , ..., C _n , one JTAG chain C _i is specified, the target device T _ij in the specified JTAG chain C _i is specified, and the specified JTAG is specified.
The program data is transmitted only to the chain C _i ,
The program data is written into the specified target device T _ij .

Another JTAG chain connection type of the present invention
Program data writing program
Multiple target devices (T₁₁~
T_1k), (T_{twenty one}~ T_2l), ..., (T_i1~ T_in),…,
(T_n1~ T_nm) Are connected in series.
Multiple JTAG chains C with dresses₁, C₂，
…, C _i,,, C_nIn contrast, with the program data,
The target for writing the program data
Includes device location data and the target device
The address data of the JTAG chain that is stored and
Send the file data to
JTAG chain for writing to the target device
Connection-type program data writing program,
The computer receives the program data write request.
File containing the program data requested to be written
Reading means for reading data, and the read file data
Address data in the data of each JTAG chain
C₁, C₂,,, C_i,,, C_nTo send in parallel to
Data sending means, the sent address data
When the address data matches the address
Only the matching JTAG chain C_iConnect to connect with
Means and position in the read file data
Based on the data said JTAG chain C connected_i
Target device in_ijAnd specify the connected J
TAG chain C_iOnly the program requested to be written
The program data requested to be written.
The target device T specified above._ijWrite to
It functions as a writing means.

Still another JTAG chain connection type of the present invention
Program data writing program
Multiple target devices (T₁₁~
T_1k), (T_{twenty one}~ T_2l), ..., (T_i1~ T_in),…,
(T_n1~ T_nm) Are connected in series.
Multiple JTAG chains C with dresses₁, C₂，
…, C _i,,, C_nIn contrast, with the program data,
The target for writing the program data
Includes device location data and the target device
The address data of the JTAG chain that is stored and
Send the file data to
JTAG chain for writing to the target device
Connection-type program data writing program,
The computer receives the program data write request.
File containing the program data requested to be written
Reading means for reading data, and the read file data
Address data in the data of each JTAG chain
C₁, C₂,,, C_i,,, C_nTo send in parallel to
Response data transmission means and match with the address data
JTAG chain C with address_iIdentified
When the position data in the read file data
JTAG chain C specified above based on_iInside
Target device T_ijAnd the identified JTAG
Chain C_iOnly the program data requested to be written
The program data requested to be written
Target device T specified_ijWriters to write in
The feature is that it functions as a step.

[0015]

1 is a schematic block diagram showing an embodiment of a JTAG chain connection type program data writing device according to the present invention. JTAG chain connection type program data writing apparatus, a plurality of JTAG chain _{C 1, C 2, ...,} C i, ..., and C _n, the data storage unit 2
And a control means 6.

Each JTAG chain C ₁ , C ₂ , ...,
C _i, ..., C _n (hereinafter, sometimes simply referred to as "C" for short), a plurality of target devices (T ₁₁ ~
T _1k ), (T _{21 to} T _2l ), ..., (T _{i1 to} T _in ) ,.
(T _n1 through T _nm) (hereinafter, abbreviated sometimes simply referred to as "T" in) and the connection means 3, 3, ... and is configured is mounted on the processing board. The target device T is F
It is a medium in which program data can be written, such as PGA, ROM, RAM, and the input and output sections of adjacent target devices T, T are connected and connected in series.
Then, on each processing board, the input parts of the target devices T ₁₁ , T ₂₁ , ..., T _i1 , ..., T _n1 on the starting end side and the target devices T _1k ,, T _2l , ..., T _in … 、
The output part of T _nm is connected to each connection means 3, and the JTA
G chains C ₁ , C ₂ , ..., C _i , ..., C _n are configured.

Each connecting means 3 is composed of a decoding section 4 and a switch section 5. Each decoding unit 4 has a unique address. When address data is sent from the control means 6 which will be described later, the decoding unit 4 determines whether the address matches the address, and when it matches, sends a selection signal to the switch unit 5. Upon receiving the selection signal, the switch unit 5 closes the switch and connects the control means 6 and the JTAG chain.

Each JTAG chain C ₁ , C ₂ , ...,
C _i , ..., C _n are provided in parallel with the control means 6,
It is detachably attached to each slot of the JTAG chain connection type program data writing device 1. By mounting in each slot, the control means 6 and the decoding section 4 of each connection means 3 are connected by an address bus. Further, the control means 6 and the switch section 5 of each connection means 3 are connected by a data bus.

The data storage means 2 is composed of a ROM, a RAM, etc., and has file data stored therein. The file data is the program data to be written in the target device T, the position data of the target device T that attempts to write the program data, and the JTAG containing the target device T.
And the address data of the chain C, and the like.

The control means 6 is composed of a CPU and a storage unit such as a ROM and a RAM, and controls each unit, transfers data, performs various calculations, and temporarily stores data. An execution program for writing program data is stored in the storage unit. This execution program executes the function corresponding to each means described later by software processing.

The reading means receives a program data write request from the input device 7 and reads file data including the program data requested to be written from the data storage means 2.

The address data transmitting means stores the address data in the file data read by the reading means,
Each JTAG chain C ₁ , C ₂ , through the address bus,
,, C _i , ..., C _n are transmitted in parallel.

[0023] writing means, for example, an address when identifying the JTAG chain C _i having an address i that matches the data i, for example, the JTAG chain is specified based on the position data j of the read file data C _i The target device T _ij in JT identified
Program data requested to be written only to the AG chain C _i is transmitted via the data bus. Then, the program data requested to be written is written to the specified target device T _ij .

Next, the operation of this embodiment will be described. First, the operator operates the input device 7 to specify file data having program data to be written (ST11). Here, it is assumed that the file data having the program data accompanied by the address data i and the position data j is designated. The designated file data is read from the data storage means 2 by the reading means (ST12). The read file data is
By the address data sending means, each JTAG chain C
₁ , C ₂ , ..., C _i , ..., C _n (ST1
3).

Each JTAG chain C ₁ , C ₂ , ...,
The decoding unit 4 for C _i , ..., C _n determines whether or not the sent address data matches its own address (ST21). Then, no selection signal is sent from the decoding unit 4 that does not match to the switch unit 5, and the JTAG chains C ₁ , C ₂ , ..., C _i-1 , C _{i + 1} ,
, C _n and the control means 6 are not connected (ST21-N
O). On the other hand, only the decoding section 4 that matches the address data i sends a selection signal to the switch section 5 (ST21.
-YES). Upon receiving the selection signal, the switch section 5 connects the control means 6 and the JTAG chain C _i (ST).
22). The switch section 5 sends a connection confirmation signal to the control means 6.

Then, the connected JTAG chain C _i
Position data j in the read file data
The target device T _ij to be written is specified by the writing means. When the target device T _ij is specified, the read program data is sent to the target device T _ij via the data bus (ST1.
4). The program data is transmitted from the target device T _i1 on the starting side where the input section is connected to the switch section 5 to the target device T _in on the ending side where the output section is connected to the switch section 5. Then, upon reaching the target device T _ij identified and written to the target device T _ij. When the writing is completed, a completion signal is sent to the control means 6 (ST23).

When the program data is not written (ST15-NO), the process ends. When writing program data (ST15-YES), a file is designated.

In the above embodiment, a plurality of JTAGs are used.
Chain C₁, C₂,,, C_i,,, C_nSet in parallel
Address data to each JTAG chain C₁, C₂，
…, C _i,,, C_nSince they are sent in parallel to
JTAG chain C with the same data_iOnly prog
Ram data is transmitted. That is, the address data
Mismatched JTAG chain C₁, C₂,,, C_i-1，
C_{i + 1},,, C_nProgram data is not transmitted to
The transmission time is shortened by this amount and the program data is written.
It is possible to speed up the inclusion process.

In the above-described embodiment, the connecting means
3 is each JTAG chain C₁, C₂,,, C_i,,, C
_nAlthough the connection means 3 is provided in the control means 6
It may be possible to function as an execution program within.
In this case, JTAG chain C on each board₁, C₂，
…, C_i,,, C_nTarget device on the start side of
T ₁₁, T_{twenty one}, ..., T_i1, ..., T_n1Input part of is data bus
Is connected to the control means 6 via the
Vise T_1k,, T_2l, ..., T_in, ..., T_nmThe output section of
It will be connected to the control means 6 via the data bus.

[0030]

As described above, according to the present invention, the JTA
A JTA that includes multiple target G-chains and includes the target device to which the program data requested to be written should be written.
By specifying the G chain, the program data requested to be written is transmitted only within the specified JTAG chain and written to a predetermined target device. This makes it possible to shorten the program data writing time and speed up the program data writing process.

Further, by constructing a plurality of JTAG chains and providing them in parallel with the control means, each JT chain is
It has become possible to send in parallel to the AG chain. Further, since each JTAG chain is given a unique address and each program data is accompanied by the address data, it becomes possible to send the program data only to the JTAG chain having the address matching the address data. . As a result, the transmitted program data is not transmitted in the JTAG chain having an address where the address data does not match, the transmission time is shortened by this amount, and the program data write processing can be sped up. .

[Brief description of drawings]

FIG. 1 is a schematic block configuration diagram of a JTAG chain connection type program data writing device according to the present invention.

FIG. 2 is a flowchart of a JTAG chain connection type program data writing device according to the present invention.

FIG. 3 is a schematic block configuration diagram of a conventional JTAG chain connection type program data writing device.

[Explanation of symbols]

1. JTAG chain connection type program data writing device 2 ... data storage means 3 ... Connection means 6 ... Control means C (C₁, C₂,,, C_i,,, C_n) ... JTAG Choi
The T ((T₁₁~ T_1k), (T_{twenty one}~ T_2l), ..., (T_i1~ T
_in), ..., (T_n1~ T _nm))… Target device

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 2G132 AA08 AC14 AE11 AE23 AG02                       AL09                 5B003 AA05 AB05 AC06 AD03                 5B048 AA19 AA20 CC18 DD08                 5F038 DF04 DF05 DT05 DT10 DT18                       EZ10 EZ20

Claims (9)

[Claims] 1. A plurality of target devices (T _{11 to} T _1k ), (T _{21 to} T _2l ), capable of writing program data,
, (T _{i1 to} T _in ), ..., (T _{n1 to} T _nm ) are connected in series, a plurality of JTAG chains (C ₁ , C ₂ , ..., C)
_i , ..., C _n ) is a JTAG chain connection type program data writing method for writing the program data in _i , ..., C _n ), wherein one JTAG chain (C _i ) is specified from among the plurality of JTAG chains, A JTAG characterized by specifying a target device (T _ij ) in the specified JTAG chain, transmitting the program data only to the specified JTAG chain, and writing the program data to the specified target device. Chain connection type program data writing method. 2. A plurality of data writeable programs
Target device (T₁₁~ T_1k), (T_{twenty one}~ T_2l),
…, (T_i1~ T_in), ..., (T_n1~ T_nm) Are connected in series
Multiple JTAs, each with its own unique address
G chain (C ₁, C₂,,, C_i,,, C_n)When, Write the program data and the program data
Position data of the target device to be used,
Of the JTAG chain that includes the target device
File data consisting of address data and
Data storage means (2)
A method for writing program data connected to a computer, When the program data write request is received, the write request
File data including the programmed program data
Read from the data storage means, The address data in the read file data is
Note: Send to each JTAG chain in parallel, Upon receiving the sent address data,
Only when the address and the address match.
AG chain (C_i), Based on the position data in the read file data
The target device in the connected JTAG chain.
Vise (T_ij) Is specified and the connected JTAG chain is identified.
The program data requested to be written to only
The write-requested program data
To write to a specified target device
TAG chain connection type program data writing method. 3. A plurality of programs capable of writing program data
Target device (T₁₁~ T_1k), (T_{twenty one}~ T_2l),
…, (T_i1~ T_in), ..., (T_n1~ T_nm) Are connected in series
Multiple JTAs, each with its own unique address
G chain (C ₁, C₂,,, C_i,,, C_n)When, Write the program data and the program data
Position data of the target device to be used,
Of the JTAG chain that includes the target device
File data consisting of address data and
Data storage means (2)
A method for writing program data connected to a computer, When the program data write request is received, the write request
File data including the programmed program data
Read from the data storage means, The address data in the read file data is
Note: Send to each JTAG chain in parallel, JTA having an address that matches the address data
G chain (C_i) Is specified,
The above is specified based on the position data in the file data
Target device (T_ij)
Specify and write only to the specified JTAG chain
Send the requested program data, and
The program data that has been
JTAG chain connection characterized by writing on a chair
Type program data writing method. 4. A control means (6) and a plurality of target devices (T _{11 to} T _1k ) provided in parallel with the control means and capable of writing program data,
(T _{21 to} T _2l ), ..., (T _{i1 to} T _in ), ..., (T _{n1 to} T
_nm ) are connected in series, and each has a plurality of JTAG chains (C ₁ , C ₂ , ..., C _i ,
, C _n ), the program data, the position data of the target device to which the program data is to be written, and the address data of the JTAG chain including the target device. The data storage means (2) for storing the program data, and the control means receives the write request for the program data, and reads the file data including the program data requested to be written from the data storage means, Address data sending means for sending the address data in the read file data to each JTAG chain in parallel, and receiving the sent address data, and matching the address data and the address only when the addresses match. JTA
Connection means for connecting to the G chain (C _i ), and a JTA having an address that matches the address data
When the G chain is specified, the specified JTA is determined based on the position data in the read file data.
Identify the target device (T _ij ) in the G chain,
Writing means for sending the program data requested to be written only to the specified JTAG chain and writing the program data requested to be written to the specified target device. JTA
G chain connection type program data writing device. 5. A control means (6) and a plurality of target devices (T _{11 to} T _1k ) provided in parallel with the control means and capable of writing program data,
(T _{21 to} T _2l ), ..., (T _{i1 to} T _in ), ..., (T _{n1 to} T
_nm ) are connected in series, and each has a plurality of JTAG chains (C ₁ , C ₂ , ..., C _i ,
, C _n ), the program data, the position data of the target device to which the program data is to be written, and the address data of the JTAG chain including the target device. And a read-out means for receiving from the data storage means 2 file data including the program data requested to be written, the control means receiving the program data write request. Address data sending means for sending address data in the read file data to each JTAG chain in parallel, and a JTA having an address matching the address data.
When the G chain (C _i ) is specified, the target device (T _ij ) in the specified JTAG chain is specified based on the position data in the read file data, and the specified JTAG chain is added. Writing means for sending only the program data requested to be written and writing the program data requested to be written to the specified target device, wherein each JTAG chain is sent from the control means. A JTAG chain connection type program data writing device, comprising: a connection means (3) for connecting the control means only when the received address data is matched with the address data. 6. A plurality of programs capable of writing program data.
Target device (T₁₁~ T_1k), (T_{twenty one}~ T_2l),
…, (T_i1~ T_in), ..., (T_n1~ T_nm) Are connected in series
Multiple JTAs, each with its own unique address
G chain (C ₁, C₂,,, C_i,,, C_n) Are parallel
Possible control means (6), Write the program data and the program data
Position data of the target device to be used,
Of the JTAG chain that includes the target device
File data consisting of address data and
The data storage means (2) The control means is When the program data write request is received, the write request
File data including the programmed program data
Reading means for reading from the data storage means 2, The address data in the read file data is
Address data sent in parallel to each JTAG chain
Sending means, JTA having an address that matches the address data
G chain (C_i) Is specified,
The above is specified based on the position data in the file data
Target device (T_ij)
Specify and write only to the specified JTAG chain
Send the requested program data, and
The program data that has been
Writing means for writing on the chair,
JTAG chain connection type program data writing device. 7. A plurality of target devices (T _{11 to} T _1k ), (T _{21 to} T _2l ), capable of writing program data,
, (T _{i1 to} T _in ), ..., (T _{n1 to} T _nm ) are connected in series, a plurality of JTAG chains (C ₁ , C ₂ , ..., C)
_i , ..., C _n ) is a JTAG chain connection type program data writing program for writing the program data in a computer, and a JTAG chain (C _i ) is selected from among the plurality of JTAG chains. Specifying the target device (T _ij ) in the specified JTAG chain, sending the program data only to the specified JTAG chain, and writing the program data to the specified target device. A JTAG chain connection type program data writing program characterized by: 8. A plurality of data writeable programs
Target device (T₁₁~ T_1k), (T_{twenty one}~ T_2l),
…, (T_i1~ T_in), ..., (T_n1~ T_nm) Are connected in series
Multiple JTAs, each with its own unique address
G chain (C ₁, C₂,,, C_i,,, C_n) To
Write the program data and the program data.
Position data of the target device to be embedded
And the JTAG check containing the target device.
File data consisting of
And outputs the program data to the target device
JTAG chain connection type program device for writing to
Data writing program, Computer, When the program data write request is received, the write request
The file data including the stored program data
Read-out means, The address data in the read file data is
Address data sent in parallel to each JTAG chain
Delivery means, Upon receiving the sent address data,
Only when the address and the address match.
AG chain (C_i) Connecting means, and Based on the position data in the read file data
The target device in the connected JTAG chain.
Vise (T_ij) Is specified and the connected JTAG chain
The program data requested to be written to only
The program data requested to be written,
As a writing means to write to the target device
JTAG chain connection type program device for functioning
Data writing program. 9. A plurality of data writeable programs.
Target device (T₁₁~ T_1k), (T_{twenty one}~ T_2l),
…, (T_i1~ T_in), ..., (T_n1~ T_nm) Are connected in series
Multiple JTAs, each with its own unique address
G chain (C ₁, C₂,,, C_i,,, C_n) To
Write the program data and the program data.
Position data of the target device to be embedded
And the JTAG check containing the target device.
File data consisting of
And outputs the program data to the target device
JTAG chain connection type program device for writing to
Data writing program, Computer, When the program data write request is received, the write request
The file data including the stored program data
Read-out means, The address data in the read file data is
Address data sent in parallel to each JTAG chain
Sending means, and JTA having an address that matches the address data
G chain (C_i) Is specified,
The above is specified based on the position data in the file data
Target device (T_ij)
Specify and write only to the specified JTAG chain
Send the requested program data, and
The program data that has been
JT for functioning as a writing means for writing on a chair
AG chain connection type program data writing program.