CN107241141A - A kind of driving chip, optical module, the switching method of optical module and PON equipment - Google Patents
A kind of driving chip, optical module, the switching method of optical module and PON equipment Download PDFInfo
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- CN107241141A CN107241141A CN201710532703.2A CN201710532703A CN107241141A CN 107241141 A CN107241141 A CN 107241141A CN 201710532703 A CN201710532703 A CN 201710532703A CN 107241141 A CN107241141 A CN 107241141A
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- optical module
- register
- driving chip
- pretection switch
- laser driver
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/40—Transceivers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/03—Arrangements for fault recovery
- H04B10/032—Arrangements for fault recovery using working and protection systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q11/0067—Provisions for optical access or distribution networks, e.g. Gigabit Ethernet Passive Optical Network (GE-PON), ATM-based Passive Optical Network (A-PON), PON-Ring
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Abstract
The invention provides a kind of driving chip, optical module, the switching method of optical module and PON equipment, driving chip is applied in optical module, and driving chip includes：Register, laser driver and limiting amplifier；The output end of register is connected with the first input end of logic sum gate, and first port, the first port of limiting amplifier of the output end of logic sum gate respectively with laser driver are connected；The first pretection switch that register output is received enables signal, and to control the burst light of laser driver to enable as failure state, the output end for controlling limiting amplifier is closed mode so that optical module is in off working state；The second protection that the register output is received enables signal, and to control the burst light of laser driver to enable as working condition, the output end for controlling the limiting amplifier is working condition so that optical module is in running order；Wherein, the register-bit of the register is pre-configured with by I2C interfaces.
Description
Technical field
The invention belongs to the switching method of technical field of photo communication, more particularly to a kind of driving chip, optical module, optical module
And PON equipment.
Background technology
EPON (PON, Passive Optical Network) technology, can as new generation broadband access technology
It is low there is provided present and following broadband services demand can be met by property height, maintenance cost, using increasingly extensive.
But, it is contemplated that optical line terminal (OLT, optical line terminal) to ONT Optical Network Terminal (ONT,
Optical Network Terminal) between optical-fiber network laying and the cost of maintenance and time input it is high, and existing network application environment
Complexity, link failure will influence the normal experience of user and reduce the operating efficiency of user.Therefore, PON equipment needs protection
Switch function, from the optical link of failure is switched to standby optical link business can be kept to continue proper communication.
It is usually to be carried out using hardware controls pretection switch switch or software control pretection switch switch in the prior art
Switching.When being switched over using hardware controls pretection switch switch, pretection switch switch need to be introduced, with reference to complex programmable logic
Device (CPLD, Complex Programmable Logic Device), field programmable gate array (FPGA, Field
Programmable Gate Array) or single-chip microcomputer use, the default judgment mechanism of automatic detection, switch reversal switch.
It is of course also possible to use software control pretection switch switch, but also must by CPLD or FPGA or single-chip microcomputer or
The detecting of central processing unit (CPU, Central Processing Unit) judges signal, according to default judgment mechanism it is automatic or
Manual switching reversal switch.
But in such scheme, pretection switch switch is expensive, and because the hardware such as pretection switch switch and CPLD are set
Standby use, takes cloth plate suqare, adds equipment cost.Software program burning is needed to support these device works simultaneously
Make, be related to programming, debugging and verification, implementation complexity is big, adds manpower and time cost.
The content of the invention
The problem of existing for prior art, the embodiments of the invention provide a kind of driving chip, optical module, optical module
, for solving in the prior art during being communicated using PON equipment, there is optical link in switching method and PON equipment
Damage or failure causes communication disruption, it is necessary to when the optical link of failure is switched into standby optical link, the complexity of realization is larger,
Cause the increased technical problem of cost.
The present invention provides a kind of driving chip, and the driving chip is applied in optical module or two-way optical assembly in plate, institute
Stating driving chip includes：Register, laser driver and limiting amplifier；Wherein,
The output end of the register is connected with the first input end of logic sum gate, the output end difference of the logic sum gate
First port, the first port of the limiting amplifier with the laser driver are connected；
The register is used to export the first pretection switch enable signal received, to control the laser driver
It is failure state that the light that happens suddenly, which is enabled, and the output end for controlling the limiting amplifier is closed mode so that the optical module is in
Off working state；
The register is additionally operable to export the second protection enable signal received, to control the prominent of the laser driver
Luminous enable is working condition, and the output end for controlling the limiting amplifier is working condition so that the optical module is in work
Make state；Wherein, the register-bit of the register be by bus for connecting microcontroller and its ancillary equipment (I2C,
Inter-Integrated Circuit) interface is pre-configured with.
In such scheme, the driving chip also includes：Pretection switch port, makes for receiving first pretection switch
Can signal and second pretection switch enable signal.
In such scheme, the pretection switch port is connected with the second input of the logic sum gate.
In such scheme, the driving chip includes：Memory cell, the register is arranged in the memory cell,
The memory cell is connected with the I2C interfaces of the driving chip.
In such scheme, the first port of the laser driver includes：Burst enables control port.
In such scheme, the first port of the limiting amplifier includes：Amplitude limit enables control port.
In such scheme, it is default data signal that the pretection switch, which enables signal,.
The present invention also provides a kind of optical module, and the optical module includes any described driving chip as described above.
The present invention also provides a kind of switching method of optical module, and the optical module includes：Driving chip；The driving chip
Including：Laser driver and limiting amplifier；Methods described includes：
Receive the first pretection switch and enable signal；
It is failure state to enable signal to control the burst light of laser driver to enable using first pretection switch, and is controlled
The output end for making the limiting amplifier is closed mode so that the optical module is in off working state；
Receive the second pretection switch and enable signal；
It is working condition to enable signal to control the burst light of laser driver to enable using second pretection switch, and is controlled
The output end for making the limiting amplifier is working condition so that the optical module is in running order.
The present invention also provides a kind of passive optical network PON equipment, and the equipment includes processor and optical module, the optical mode
The driving chip of block includes：Register, laser driver and limiting amplifier；Wherein,
The output end of the register is connected with the first input end of logic sum gate, the output end difference of the logic sum gate
First port, the first port of the limiting amplifier with the laser driver are connected；
The register is used to export the first pretection switch enable signal received, to control the laser driver
It is failure state that the light that happens suddenly, which is enabled, and the output end for controlling the limiting amplifier is closed mode so that the optical module is in
Off working state；
The register is additionally operable to export the second protection enable signal received, to control the prominent of the laser driver
Luminous enable is working condition, and the output end for controlling the limiting amplifier is working condition so that the optical module is in work
Make state；Wherein, the register-bit of the register is connect by the bus I2C for connecting microcontroller and its ancillary equipment
What mouth was pre-configured with.
The invention provides a kind of driving chip, optical module, the switching method of optical module and PON equipment, the driving core
Piece is applied in optical module or two-way optical assembly in plate, and the driving chip includes：Register, laser driver and limited range enlargement
Device；Wherein, the output end of the register is connected with the first input end of logic sum gate, the output end difference of the logic sum gate
First port, the first port of the limiting amplifier with the laser driver are connected；The register connects for output
The first pretection switch received enables signal, to control the burst light of the laser driver to enable as failure state, controls institute
The output end for stating limiting amplifier is closed mode so that the optical module is in off working state；The register is additionally operable to
Export the second protection received and enable signal, to control the burst light of the laser driver to enable as working condition, control
The output end of the limiting amplifier is working condition so that the optical module is in running order；Wherein, the register
Register-bit is pre-configured with by I2C interfaces；If in this way, when key light module is in normal operating conditions, using receiving
The first pretection switch enable signal can allow standby optical module be in off working state；Equally when key light module to opposite equip.
Optical link when breaking down, utilize the first pretection switch for receiving to enable signal and configure posting for the key light module register
Storage position, makes key light module switch to off working state, and recover standby using the second pretection switch enable signal received
The register-bit of optical mode block register, can allow standby optical module to switch to working condition；So occur optical link damage lead
When causing communication disruption, without introducing any hardware device, one register-bit of standby optical module need to only be entered by I2C interfaces
Row is corresponding to be set, you can realize the switching of optical module, and failure optical link is switched into normal optical link, and switch speed is fast,
Implementation process is simple, also reduces time cost and financial cost.
Brief description of the drawings
Fig. 1 is the partial circuit diagram of driving chip provided in an embodiment of the present invention；
Fig. 2 is the schematic flow sheet of the driving method of optical module provided in an embodiment of the present invention.
Embodiment
In order to solve in the prior art during being communicated using PON equipment, optical link damage occur causes to lead to
Letter is interrupted, it is necessary to when the optical link of failure is switched into standby optical link, the complexity of realization is larger, causes the increased skill of cost
Art problem, the invention provides a kind of driving chip, optical module, the switching method of optical module and PON equipment, the driving chip
Apply in optical module or two-way optical assembly in plate, the driving chip includes：Register, laser driver and limited range enlargement
Device；Wherein, the output end of the register is connected with the first input end of logic sum gate, the output end difference of the logic sum gate
First port, the first port of the limiting amplifier with the laser driver are connected；The register output is received
The first pretection switch enable signal, to control the burst light of the laser driver to enable as failure state, control the limit
The output end of width amplifier is closed mode so that the optical module is in off working state；The register output is received
The second protection enable signal, to control the burst light of the laser driver to enable as working condition, control the amplitude limit to put
The output end of big device is working condition so that the optical module is in running order；Wherein, the register-bit of the register is
It is pre-configured with by I2C interfaces.
Technical scheme is described in further detail below by drawings and the specific embodiments.
Embodiment one
The present embodiment provides a kind of driving chip, applies in optical module or two-way optical assembly in plate (BOSA, Bi-
Directional Optical Sub-Assembly) on Board, as shown in figure 1, the driving chip includes：Register
1st, logic sum gate 2, laser driver 3 and limiting amplifier 4；
Wherein, the output end of the register 1 is connected with the first input end of logic sum gate 2, the logic sum gate 2 it is defeated
Go out first port, the first port of the limiting amplifier 4 of end respectively with the laser driver 3 to be connected；The register 1
Export the first pretection switch received and enable signal, BEN is enabled as failure shape using the burst light for controlling the laser driver 3
State, i.e., any burst light, which enables signal input, can not all drive laser driver 3；Even if the center processing of passive optical network equipment
Parallel series/staticizer interface of device CPU PON medium access control (MAC, Media Access Control)
(SerDes, SERializer/DESerializer) has differential signal to input TXIN+/- port, can not also make laser driver 3
Drive optical assembly light, and due to TXIN+/- between have the Ω terminal impedances of difference 100 termination, differential signal will not influenceed
Signal integrity.
Further, the first pretection switch enables signal and controls the output end of the limiting amplifier 4 simultaneously to close shape
State so that the optical module is in off working state.That is, even if limiting amplifier 4 receives the electric signal that optical assembly is detected
Into RXIN+/-, signal output part RXOUT+/- is also without signal output.
Here, the register 1 can also export the second protection received and enable signal, to control the Laser Driven
It is working condition that the burst light of device 3, which is enabled, and the output end for controlling the limiting amplifier 4 is working condition so that the optical mode
Block is in running order；Wherein, the first port of the laser driver 3 includes：Burst enables control port；The amplitude limit is put
The first port of big device 4 includes：Amplitude limit enables control port.
Wherein, the register-bit of the register 1 is pre-configured with by I2C interfaces；First pretection switch makes
It is default data signal that energy signal and the second pretection switch, which enable signal, and first pretection switch enables signal and second
Pretection switch enables signal difference, i.e., when it is high level that first pretection switch, which enables signal, the second pretection switch is enabled
Signal is just low level；When it is low level that first pretection switch, which enables signal, the second pretection switch enables signal and is just
High level.
It should be noted that because needing to configure the register-bit standby of register 1 using I2C interfaces, because
This, the driving chip also includes memory cell, and the register 1 is arranged in the memory cell, the memory cell with
The I2C interfaces of the driving chip are connected.The register-bit standby of register 1 is configured using I2C interfaces
When, because memory cell stores binary message, therefore can only to be configured to 0 or 1, i.e. register 1 defeated by the register-bit standby
It is low level or high level that the pretection switch gone out, which enables signal,.
Here, referring to Fig. 1, the driving chip also includes：Pretection switch port Standby-SW, for receiving described
One pretection switch enables signal and second pretection switch enables signal；The pretection switch port Standby-SW with it is described
Second input of logic sum gate 2 is connected.That is, the pretection switch of pretection switch port Standby-SW inputs enables letter
Number can with register 1 input pretection switch enable signal together with by logic sum gate 2, when one pretection switch of any of which
When enabling signal for default enable data signal, you can trigger protection switch function is enabled, and otherwise, pretection switch function does not make
Energy.
So, the register-bit of the pretection switch port of chip or I2C interfaces to standby optical module need to only be passed through
Set accordingly, be that can be achieved without using extra hardware circuits such as pretection switch switch, CPLD FPGA single-chip microcomputers
The pretection switch of optical module, is not take up cloth plate suqare, and cost is low, and without entering to programming devices such as CPLD FPGA single-chip microcomputers
Row programming burning, is realized simple；And the handover delay switched without pretection switch, no CPLD FPAG single-chip microcomputer etc. software
Calculation process is delayed, and shortens protection switch time.
Embodiment two
Corresponding to embodiment one, the present embodiment provides a kind of optical module, and the optical module is included described in embodiment one
Driving chip,
As shown in figure 1, the driving chip includes：Register 1, logic sum gate 2, laser driver 3 and limiting amplifier
4；
Wherein, the output end of the register 1 is connected with the first input end of logic sum gate 2, the logic sum gate 2 it is defeated
Go out first port, the first port of the limiting amplifier 4 of end respectively with the laser driver 3 to be connected；The register 1
Export the first pretection switch received and enable signal, BEN is enabled as failure shape using the burst light for controlling the laser driver 3
State, i.e., any burst light, which enables signal input, can not all drive laser driver 3；Even if the center processing of passive optical network equipment
Device CPU PON MAC SerDes interfaces have differential signal to input TXIN+/- port, laser driver 3 is driven light
Component light, and due to TXIN+/- between have the Ω terminal impedances of difference 100 termination, the signal for not influenceing differential signal is complete
Whole property.
Further, the first pretection switch enables signal and controls the output end of the limiting amplifier 4 simultaneously to close shape
State so that the optical module is in off working state.That is, even if limiting amplifier 4 receives the electric signal that optical assembly is detected
Into RXIN+/-, signal output part RXOUT+/- is also without signal output.
Here, the register 1 can also export the second protection received and enable signal, to control the Laser Driven
It is working condition that the burst light of device 3, which is enabled, and the output end for controlling the limiting amplifier 4 is working condition, described that can cause
Optical module is in running order；Wherein, the first port of the laser driver 3 includes：Burst enables control port；The limit
The first port of width amplifier 4 includes：Amplitude limit enables control port.
Wherein, the register-bit of the register 1 is pre-configured with by I2C interfaces；First pretection switch makes
It is default data signal that energy signal and the second pretection switch, which enable signal, and first pretection switch enables signal and second
Pretection switch enables signal difference, i.e., when it is high level that first pretection switch, which enables signal, the second pretection switch is enabled
Signal is just low level；When it is low level that first pretection switch, which enables signal, the second pretection switch enables signal and is just
High level.
It should be noted that because needing to configure the register-bit standby of register 1 using I2C interfaces, because
This, the driving chip also includes memory cell, and the register 1 is arranged in the memory cell, the memory cell with
The I2C interfaces of the driving chip are connected.The register-bit standby of register 1 is configured using I2C interfaces
When, because memory cell stores binary message, therefore can only to be configured to 0 or 1, i.e. register 1 defeated by the register-bit standby
It is low level or high level that the pretection switch gone out, which enables signal,.
Here, referring to Fig. 1, the driving chip also includes：Pretection switch port Standby-SW, for receiving described
One pretection switch enables signal and second pretection switch enables signal；The pretection switch port Standby-SW with it is described
Second input of logic sum gate 2 is connected.That is, the pretection switch of pretection switch port Standby-SW inputs enables letter
Number can with register 1 input pretection switch enable signal together with by logic sum gate 2, when one pretection switch of any of which
When enabling signal for default enable data signal, you can trigger protection switch function is enabled, and otherwise, pretection switch function does not make
Energy.
So, the register-bit of the pretection switch port of chip or I2C interfaces to standby optical module need to only be passed through
Set accordingly, be that can be achieved without using extra hardware circuits such as pretection switch switch, CPLD FPGA single-chip microcomputers
The pretection switch of optical module, is not take up cloth plate suqare, and cost is low, and without entering to programming devices such as CPLD FPGA single-chip microcomputers
Row programming burning, is realized simple；And the handover delay switched without pretection switch, no CPLD FPAG single-chip microcomputer etc. software
Calculation process is delayed, and shortens protection switch time.
Embodiment three
Corresponding to embodiment two, the present embodiment also provides a kind of switching method of optical module, as shown in Fig. 2 methods described
Including：
S101, receives the first pretection switch and enables signal；
In this step, receive first pretection switch using register and enable signal.Specifically, the register is defeated
Go out end with the first input end of logic sum gate to be connected, the output end of the logic sum gate respectively with the laser driver first
Port, the first port of the limiting amplifier are connected.Here, the driving chip also includes：Pretection switch port
Standby-SW, for receiving, first pretection switch enables signal and second pretection switch enables signal；It is described to protect
Protective switching port Standby-SW is connected with the second input of the logic sum gate.That is, pretection switch port
The first pretection switch that first pretection switch of Standby-SW inputs enables signal and can inputted with register enables signal one
Rise by logic sum gate, when one the first pretection switch of any of which enables signal for default enable data signal, you can
Trigger protection switch function is enabled.
Here, the first port of the laser driver includes：Burst enables control port；The of the limiting amplifier
Single port includes：Amplitude limit enables control port.
Wherein, the register-bit of the register is pre-configured with by I2C interfaces；First pretection switch is enabled
It is default data signal that signal and the second pretection switch, which enable signal, and first pretection switch enables signal and the second guarantor
Protective switching enables signal difference, i.e., when it is high level that first pretection switch, which enables signal, the second pretection switch enables letter
Number just be low level；When it is low level that first pretection switch, which enables signal, it is just height that the second pretection switch, which enables signal,
Level.
It should be noted that because needing to configure the register-bit standby of register using I2C interfaces, therefore,
The driving chip also includes memory cell, and the register is arranged in the memory cell, the memory cell with it is described
The I2C interfaces of driving chip are connected.When being configured using I2C interfaces to the register-bit standby of register, because
Memory cell stores binary message, therefore the register-bit standby can only be configured to 0 or 1, the i.e. guarantor of register output
It is low level or high level that protective switching, which enables signal,.
S102, enables signal using first pretection switch and controls the burst light of laser driver to enable for failure shape
State, and the output end of the limiting amplifier is controlled for closed mode；So that the optical module is in off working state；
After the first pretection switch enable signal is received, export the first pretection switch received and enable signal, to control
The burst light for making the laser driver enables BEN for failure state, i.e., any burst light, which enables signal input, can not all drive
Laser driver；Even if the CPU of PON equipment SerDes interfaces have differential signal input signal TXIN+/- port, it can not also make
Laser driver driving optical assembly light, and due to TXIN+/- between have the Ω terminal impedances of difference 100 termination, will not influence
The signal integrity of differential signal.
Further, the first pretection switch enables signal and controls the output end of the limiting amplifier simultaneously to close shape
State so that the optical module is in off working state.That is, even if limiting amplifier receives the electric signal entrance of optical assembly detection
RXIN+/-, signal output part RXOUT+/- also without signal output.
S103, receives the second pretection switch and enables signal；
When optical link breaks down, it is necessary to when standby optical module is switched into normal operating conditions, receive the second protection and fall
Change enable signal；Similarly, the register can receive the second pretection switch simultaneously with pretection switch port Standby-SW and make
Can signal, second that the second pretection switch enable signal that pretection switch port Standby-SW is inputted can be with register input
Pretection switch enables signal together by logic sum gate, when one the second pretection switch of any of which enable signal for it is default not
When enabling data signal, that is, close pretection switch function.
S104, it is work shape to enable signal to control the burst light of laser driver to enable using second pretection switch
State, and the output end of the limiting amplifier is controlled for working condition；So that the optical module is in running order.
In this step, it is work to enable signal to control the burst light of laser driver to enable using second pretection switch
State, and the output end of the limiting amplifier is controlled for working condition；So that the optical module is in running order.So that
Obtain standby optical module and enter normal operating conditions.
Example IV
When the optical module provided using embodiment two carries out optic communication, it is embodied as follows：
ONT Optical Network Terminal ONT the first optical module, the second optical module respectively with same optical line terminal OLT not ibid
Join mouth connection, or be directly connected with two OLT, wherein, first optical module enters normal operating conditions, the second optical module
For stand-by state.
When the first optical module to OLT communication links breaks down, to the Standby-SW ports of first optical module
Input the first pretection switch and enable signal, or, the register for causing the first optical module by I2C bus configuration registers is exported
First pretection switch enables signal so that the first optical module is in off working state；
Then, the second pretection switch enable signal is inputted to the Standby-SW ports of second optical module, or, lead to
Crossing I2C bus configuration registers causes the register of the second optical module to export the second pretection switch and enable signal so that the second light
Module is in running order；Such second optical module just switches to working condition from stand-by state；It should be noted that need to only lead to
The pretection switch port or I2C interfaces for crossing chip are set accordingly to a register-bit of standby optical module, switching
Time is not more than 50ms.
Embodiment five
The present embodiment provides a kind of PON equipment, and the PON equipment includes the optical module that processor and embodiment two are provided,
The optical module includes：First optical module and the second optical module；Wherein, the driving core of first optical module and the second optical module
Piece is identical, and first optical module is main optical module, and second optical module is standby optical module；By taking the first optical module as an example,
Referring to Fig. 1, the driving chip of first optical module includes：Register, laser driver and limiting amplifier；
Wherein, the output end of the register 1 is connected with the first input end of logic sum gate 2, the logic sum gate 2 it is defeated
Go out first port, the first port of the limiting amplifier 4 of end respectively with the laser driver 3 to be connected；The register 1
Export the first pretection switch received and enable signal, BEN is enabled as failure shape using the burst light for controlling the laser driver 3
State, i.e., any burst light, which enables signal input, can not all drive laser driver 3；Even if the central processor CPU of PON equipment
SerDes interfaces have differential signal input signal TXIN+/- port, the driving optical assembly of laser driver 3 is lighted,
And due to TXIN+/- between have the Ω terminal impedances of difference 100 termination, will not influence pretection switch enable signal integrality.
Further, the first pretection switch enables signal and controls the output end of the limiting amplifier 4 simultaneously to close shape
State so that the optical module is in off working state.That is, even if limiting amplifier 4 receives the electric signal that optical assembly is detected
Into RXIN+/-, signal output part RXOUT+/- is also without signal output.Such as, when the light of the first optical module to opposite equip.
When link is normal, then enables signal using the first pretection switch and control the second optical module to be in off working state.
Here, the register 1 can also export the second protection received and enable signal, to control the Laser Driven
It is working condition that the burst light of device 3, which is enabled, and the output end for controlling the limiting amplifier 4 is working condition, described that can cause
Optical module is in running order；Wherein, the first port of the laser driver 3 includes：Burst enables control port；The limit
The first port of width amplifier 4 includes：Amplitude limit enables control port.Such as, when the optical link of the first optical module to opposite equip.
During failure, then enable signal using the first pretection switch and control the first optical module to be in off working state, protected using second
Shield enables signal and controls the second optical module in running order, so that optical link is switched into the second optical module to opposite equip.
Optical link.
Wherein, the register-bit of the register 1 is pre-configured with by I2C interfaces；First pretection switch makes
It is default data signal that energy signal and the second pretection switch, which enable signal, and first pretection switch enables signal and second
Pretection switch enables signal difference, i.e., when it is high level that first pretection switch, which enables signal, the second pretection switch is enabled
Signal is just low level；When it is low level that first pretection switch, which enables signal, the second pretection switch enables signal and is just
High level.
It should be noted that because needing to configure the register-bit standby of register 1 using I2C interfaces, because
This, the driving chip also includes memory cell, and the register 1 is arranged in the memory cell, the memory cell with
The I2C interfaces of the driving chip are connected.The register-bit standby of register 1 is configured using I2C interfaces
When, because memory cell stores binary message, therefore can only to be configured to 0 or 1, i.e. register 1 defeated by the register-bit standby
It is low level or high level that the pretection switch gone out, which enables signal,.
Here, referring to Fig. 1, the driving chip also includes：Pretection switch port Standby-SW, for receiving described
One pretection switch enables signal and second pretection switch enables signal；The pretection switch port Standby-SW with it is described
Second input of logic sum gate 2 is connected.That is, the pretection switch of pretection switch port Standby-SW inputs enables letter
Number can with register 1 input pretection switch enable signal together with by logic sum gate 2, when one pretection switch of any of which
When enabling signal for default enable data signal, you can trigger protection switch function is enabled, and otherwise, pretection switch function does not make
Energy.
So, the register-bit of the pretection switch port of chip or I2C interfaces to standby optical module need to only be passed through
Set accordingly, be that can be achieved without using extra hardware circuits such as pretection switch switch, CPLD FPGA single-chip microcomputers
The pretection switch of optical module, is not take up cloth plate suqare, and cost is low, and without entering to programming devices such as CPLD FPGA single-chip microcomputers
Row programming burning, is realized simple；And the handover delay switched without pretection switch, no CPLD FPAG single-chip microcomputer etc. software
Calculation process is delayed, and shortens protection switch time.
What driving chip provided in an embodiment of the present invention, optical module, the switching method of optical module and PON equipment can be brought has
Beneficial effect is at least：
The invention provides a kind of driving chip, optical module, the switching method of optical module and PON equipment, the driving core
Piece is applied in optical module, and the driving chip includes：Register, laser driver and limiting amplifier；Wherein, the deposit
The output end of device is connected with the first input end of logic sum gate, the output end of the logic sum gate respectively with the laser driver
First port, the first port of the limiting amplifier be connected；The register falls for exporting the receive first protection
Enable signal is changed, to control the burst light of the laser driver to enable as failure state, it is pass to control the limiting amplifier
Closed state so that the optical module is in off working state；The register is additionally operable to export the second protection enable received
Signal, to control the burst light of the laser driver to enable as working condition, the output end for controlling the limiting amplifier is
Working condition so that the optical module is in running order；Wherein, the register-bit of the register is by micro- for connecting
What the bus I2C interfaces of controller and its ancillary equipment were pre-configured with；If in this way, key light module be in normal operating conditions when,
Enabling signal using the first pretection switch received can allow standby optical module to be in off working state；Equally work as key light module
During in failure, enable signal using the second pretection switch for receiving and recover the register-bit, can allow standby optical module
Switch to working condition；So occur link damage failure cause communication disruption when, without introducing any hardware device, such as
The extra hardware circuits such as pretection switch switch, CPLD FPGA single-chip microcomputers, are not take up cloth plate suqare, cost is low, without right
CPLD FPGA the programming device such as single-chip microcomputer be programmed burning, without complicated debugging is carried out, only need to pass through chip
Pretection switch port or I2C interfaces are set accordingly to a register-bit of standby optical module, you can realize optical mode
The switching of block, implementation process is simple, also reduces time cost and financial cost；And due to the switching switched without pretection switch
Time delay, no CPLD FPAG single-chip microcomputer etc. the delay of software calculation process, shorten protection switch time, improve response speed.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention, it is all
Any modifications, equivalent substitutions and improvements made within the spirit and principles in the present invention etc., should be included in the protection of the present invention
Within the scope of.
Claims (10)
1. a kind of driving chip, it is characterised in that the driving chip is applied in optical module or two-way optical assembly in plate, described
Driving chip includes：Register, laser driver and limiting amplifier；Wherein,
The output end of the register is connected with the first input end of logic sum gate, the output end of the logic sum gate respectively with institute
The first port of laser driver, the first port of the limiting amplifier is stated to be connected；
The register is used to export the first pretection switch enable signal received, to control the burst of the laser driver
It is failure state that light, which is enabled, and the output end for controlling the limiting amplifier is closed mode so that the optical module is in non-work
Make state；
The register is additionally operable to export the second protection enable signal received, to control the burst light of the laser driver
Enable as working condition, the output end for controlling the limiting amplifier is working condition so that the optical module is in work shape
State；Wherein, the register-bit of the register is pre- by the I2C EBIs for connecting microcontroller and its ancillary equipment
First configure.
2. driving chip as claimed in claim 1, it is characterised in that the driving chip also includes：Pretection switch port, is used
In receiving, first pretection switch enables signal and second pretection switch enables signal.
3. driving chip as claimed in claim 2, it is characterised in that the of the pretection switch port and the logic sum gate
Two inputs are connected.
4. driving chip as claimed in claim 1, it is characterised in that the driving chip includes：Memory cell, the deposit
Device is arranged in the memory cell, and the memory cell is connected with the I2C interfaces of the driving chip.
5. driving chip as claimed in claim 1, it is characterised in that the first port of the laser driver includes：Burst
Enable control port.
6. driving chip as claimed in claim 1, it is characterised in that the first port of the limiting amplifier includes：Amplitude limit
Enable control port.
7. driving chip as claimed in claim 1, it is characterised in that it is default numeral letter that the pretection switch, which enables signal,
Number.
8. a kind of optical module, it is characterised in that the optical module includes the driving chip as described in claim 1 to 7 is any.
9. a kind of switching method of optical module, it is characterised in that the optical module includes：Driving chip；The driving chip bag
Include：Laser driver and limiting amplifier；Methods described includes：
Receive the first pretection switch and enable signal；
It is failure state to enable signal to control the burst light of laser driver to enable using first pretection switch, and controls institute
The output end for stating limiting amplifier is closed mode so that the optical module is in off working state；
Receive the second pretection switch and enable signal；
It is working condition to enable signal to control the burst light of laser driver to enable using second pretection switch, and controls institute
The output end for stating limiting amplifier is working condition so that the optical module is in running order.
10. a kind of passive optical network PON equipment, it is characterised in that the equipment includes processor and optical module, the optical module
Driving chip include：Register, laser driver and limiting amplifier；Wherein,
The output end of the register is connected with the first input end of logic sum gate, the output end of the logic sum gate respectively with institute
The first port of laser driver, the first port of the limiting amplifier is stated to be connected；
The register is used to export the first pretection switch enable signal received, to control the burst of the laser driver
It is failure state that light, which is enabled, and the output end for controlling the limiting amplifier is closed mode so that the optical module is in non-work
Make state；
The register is additionally operable to export the second protection enable signal received, to control the burst light of the laser driver
Enable as working condition, the output end for controlling the limiting amplifier is working condition so that the optical module is in work shape
State；Wherein, the register-bit of the register is pre- by the bus I2C interfaces for connecting microcontroller and its ancillary equipment
First configure.
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| CN201710532703.2A CN107241141B (en) | 2017-07-03 | 2017-07-03 | Drive chip, optical module switching method and PON (passive optical network) equipment |
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| CN201710532703.2A CN107241141B (en) | 2017-07-03 | 2017-07-03 | Drive chip, optical module switching method and PON (passive optical network) equipment |
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| CN107786281A (en) * | 2017-11-03 | 2018-03-09 | 青岛海信宽带多媒体技术有限公司 | Optical module and its power consumption control method, device |
| CN109244812A (en) * | 2018-11-12 | 2019-01-18 | 深圳市亚派光电器件有限公司 | Laser drive circuit and optical module |
| CN110708121A (en) * | 2019-10-16 | 2020-01-17 | 青岛海信宽带多媒体技术有限公司 | Optical module and control method thereof |
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| CN103297142A (en) * | 2013-05-08 | 2013-09-11 | 青岛海信宽带多媒体技术有限公司 | Method based on FPGA for eliminating optical power overshoot and optical module |
| US20140321862A1 (en) * | 2013-04-26 | 2014-10-30 | Kabushiki Kaisha Toshiba | Photon detector and a photon detection method |
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| CN102546000A (en) * | 2012-01-18 | 2012-07-04 | 索尔思光电（成都）有限公司 | EPON OLT (Ethernet Passive Optical Network) OLT (Optical Line Terminal) energy-saving control method and system |
| US20140321862A1 (en) * | 2013-04-26 | 2014-10-30 | Kabushiki Kaisha Toshiba | Photon detector and a photon detection method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107786281A (en) * | 2017-11-03 | 2018-03-09 | 青岛海信宽带多媒体技术有限公司 | Optical module and its power consumption control method, device |
| CN109244812A (en) * | 2018-11-12 | 2019-01-18 | 深圳市亚派光电器件有限公司 | Laser drive circuit and optical module |
| CN109244812B (en) * | 2018-11-12 | 2024-06-18 | 深圳市亚派光电器件有限公司 | Laser driving circuit and optical module |
| CN110708121A (en) * | 2019-10-16 | 2020-01-17 | 青岛海信宽带多媒体技术有限公司 | Optical module and control method thereof |
| CN110708121B (en) * | 2019-10-16 | 2022-06-28 | 青岛海信宽带多媒体技术有限公司 | Optical module and control method thereof |
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| CN107241141B (en) | 2023-04-07 |
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