CN107817993A - A kind of vehicle-mounted MCU application circuits using external house dog - Google Patents
A kind of vehicle-mounted MCU application circuits using external house dog Download PDFInfo
- Publication number
- CN107817993A CN107817993A CN201711294916.2A CN201711294916A CN107817993A CN 107817993 A CN107817993 A CN 107817993A CN 201711294916 A CN201711294916 A CN 201711294916A CN 107817993 A CN107817993 A CN 107817993A
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- acc
- house dog
- mcu module
- resistance
- electric capacity
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- 238000001514 detection method Methods 0.000 claims abstract description 14
- 230000007958 sleep Effects 0.000 claims abstract description 6
- 230000000087 stabilizing effect Effects 0.000 claims description 17
- 230000001960 triggered effect Effects 0.000 claims description 7
- 230000005611 electricity Effects 0.000 claims description 6
- 230000007704 transition Effects 0.000 claims description 6
- 230000005059 dormancy Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/44—Arrangements for executing specific programs
- G06F9/4401—Bootstrapping
- G06F9/4418—Suspend and resume; Hibernate and awake
Abstract
The invention discloses a kind of vehicle-mounted MCU application circuits using external house dog, including：MCU module, ACC state detection circuits, watchdog reset circuit；ACC state detection circuits can detect ACC power state signals, and be signally attached to watchdog reset circuit and MCU module；Watchdog reset circuit includes house dog, and WatchDog Timer is provided with house dog；MCU module possesses sleep mode；The watchdog reset circuit controls enabling or closing for WatchDog Timer according to ACC power state signals, and the MCU module into park mode or exits park mode according to the selection of ACC power state signals；When WatchDog Timer enables and MCU module is in park mode, watchdog reset MCU module makes it exit park mode.MCU application circuits provided by the invention, small using quiescent current in the environment of external house dog, is realized, and ensure reliably wake up MCU module in ACC electric power startings.
Description
Technical field
The present invention relates to a kind of vehicle electronic circuit, more particularly to a kind of vehicle-mounted MCU application circuits using external house dog.
Background technology
In automobile MCU application circuits, due to the MCU module of built-in house dog, its reliability is relatively low, thus general use
External house dog strengthens the reliability of MCU system.But external house dog is used alone on automobile and there are problems that：
(1) when automobile closes ACC power supplys, feeding dog or MCU using MCU timer interruptions, sleep mode does not feed hello the dog mode such as dog so that
The quiescent current of automobile is larger, storage battery power shortage, shortens the life-span of battery；(2) MCU enters park mode after closing ACC power supplys,
When being again turned on ACC power supplys, have certain probability and the phenomenon that MCU wakes up failure occur, have influence on the normal use of automobile circuit,
Jeopardize traffic safety.
The content of the invention
It is an object of the invention to provide a kind of vehicle-mounted MCU application circuits using external house dog, ACC can be effectively reduced
Circuit static electric current during power-off, and MCU can reliably be waken up when ACC electric power startings.
To achieve the above object, technical scheme is as follows：
A kind of vehicle-mounted MCU application circuits using external house dog, including：MCU module, ACC state detection circuits, guard the gate
Dog reset circuit；ACC state detection circuits can detect ACC power supply status, export ACC power state signals, and be signally attached to
Watchdog reset circuit and MCU module；Watchdog reset circuit includes house dog, and WatchDog Timer is provided with house dog；
MCU module possesses sleep mode；The watchdog reset circuit controls opening for WatchDog Timer according to ACC power state signals
With or close, the MCU module selects to enter or exits park mode according to ACC power state signals；Work as WatchDog Timer
Enable and when MCU module is in park mode, watchdog reset MCU module makes it exit park mode.
In a certain embodiment：Also include voltage stabilizing power supplying circuit, the voltage stabilizing power supplying circuit includes power supply voltage stabilizing chip and electricity
Hold C100, electric capacity C101, resistance R100, electric capacity R101, the model BD3572YHFP-M of power supply voltage stabilizing chip；
1 pin of power supply voltage stabilizing chip draws two connection ends, wherein a connection end is connected to normal electrical input, another connection
End is grounded through electric capacity C100, and 3 pin ground connection, 4 pin draw two connection ends, wherein a connection end is grounded through resistance R101, Ling Yilian
Connect end through resistance R100 with 5 pin to be connected, and draw output end of pressure-stabilizing, output end of pressure-stabilizing output 5V voltages.
In a certain embodiment：ACC state detection circuits include triode Q300, resistance R300, resistance R301, resistance
R302, resistance R303, electric capacity C300；
Triode Q300 base stage is connected to ACC inputs, resistance R303 and resistance R301 company through resistance R303, R301
Contact lead connection electric capacity C300 one end, electric capacity C300 other end ground connection, the company of resistance R303 and triode Q300 base stage
Contact lead is connected to resistance R302 one end, resistance R302 other end ground connection；
Triode Q300 grounded emitter, its colelctor electrode draw ACC_DET output ends, and the colelctor electrode is also through resistance R300
It is connected to above-mentioned output end of pressure-stabilizing；
When ACC power-offs, ACC_DET output ends output high level, when ACC electric power startings, ACC_DET output ends
Export low level.
In a certain embodiment：MCU module has external interrupt end RA2/INT, the RA2/INT ends and the ACC_DET
Output end is connected and receives from it the ACC power state signals；When ACC power-offs, MCU module enters park mode,
When ACC electric power startings, MCU module can exit park mode.
In a certain embodiment：Watchdog reset circuit also include triple gate, resistance R200, electric capacity C200, electric capacity C201,
Electric capacity C202；The model 74LVC1G125 of triple gate, the model TPS3828-50 of house dog；The OUT terminal of triple gate is with seeing
The WDI pins of door dog are connected；The OE ends of triple gate are connected to the ACC_DET output ends, and receive from it the ACC power supplys shape
State signal controls the output of its OUT terminal to control the OE ends of triple gate whether to enable；
When ACC electric power startings, OE ends low level is effective, and the output of normal " 0 " or " 1 " is presented in triple gate OUT terminal；When
During ACC power-offs, OE ends high level is effective, and high-impedance state is presented in triple gate OUT terminal.
In a certain embodiment：Two connection ends are drawn at the IN ends of triple gate, wherein a connection end is grounded through resistance R200,
The other end is connected to the RA5 ends of MCU module, for receiving the feeding-dog signal of MCU module.
In a certain embodiment：When the output of normal " 0 " or " 1 " is presented in triple gate OUT terminal, WDI pins normally receive
Its output signal, WatchDog Timer are activated；When high-impedance state is presented in triple gate OUT terminal, WDI pins are hanging, house dog timing
Device is closed；
The WatchDog Timer can be triggered by the positive transition on WDI pins or negative saltus step, the positive transition or negative saltus step by
The feeding-dog signal is formed；If timer is not triggered in time-out time, the RESET pins of house dog are effective.
In a certain embodiment：The RESET ends of MCU module are connected with the RESET pins of house dog, pass through house dog
The RESET signal that RESET pins are sent resets MCU module.
In a certain embodiment：When ACC electric power startings, and when MCU module occur and can not exit park mode phenomenon, guard the gate
The RESET pins of dog are effective, realize that the watchdog reset MCU module makes it exit park mode.
In a certain embodiment：The VCC ends of the triple gate connect the output end of pressure-stabilizing, and tie point therebetween also draws
Line is connected to electric capacity C200 one end, electric capacity C200 other end ground connection, the GND ends ground connection of triple gate；
The VDD pins of the house dog connect the output end of pressure-stabilizing, and tie point also lead therebetween is connected to electric capacity
C201 one end, electric capacity C201 other end ground connection, the GND pin ground connection of house dog；It is defeated that house dog also includes a hand-reset
Enter pin MR, when MR pins are low level, its RESET pin is effective；
The vdd terminal of the MCU module connects the output end of pressure-stabilizing, and tie point also lead therebetween is connected to electric capacity
C202 one end, electric capacity C202 other end ground connection, its VSS end is also grounded.
Whether the present invention opens using ACC state detection circuits detection ACC power supplys, and according to the same time control of ACC power supply status
The output of triple gate processed and the resting state of MCU module；So that when ACC power-offs, WatchDog Timer is closed and MCU
Module enters dormancy, effectively reduces circuit static electric current, protects automobile storage battery；And when ACC electric power startings, house dog timing
Device is opened, and when MCU module can not be waken up, is effectively waken up by watchdog reset function MCU module, is improved
Automobile circuit reliability.
Brief description of the drawings
Fig. 1 shows the structure of voltage stabilizing power supplying circuit；
Fig. 2 shows MCU module, ACC state detection circuits, the structure and annexation of watchdog reset circuit；
Fig. 3 is the enlarged diagram of part A in Fig. 2；
Fig. 4 is the enlarged diagram of part B in Fig. 2.
Embodiment
It refer to Fig. 1-4, a kind of vehicle-mounted MCU application circuits using external house dog, including：MCU module U202, voltage stabilizing
Power supply circuit, ACC state detection circuits, watchdog reset circuit.
Voltage stabilizing power supplying circuit includes power supply voltage stabilizing chip U100 and supporting peripheral components, including electric capacity C100, C101, electricity
Hinder R100, R101.Voltage stabilizing chip U100 1 pin draws two connection ends, wherein a connection end is connected to normal electrical input, it is another
Connection end is grounded through electric capacity C100, and 4 pin draw two connection ends, wherein a connection end is grounded through resistance R101, another connection end
It is connected through resistance R100 with 5 pin, and draws output end of pressure-stabilizing, the 3 pin ground connection of voltage stabilizing chip.Preferably, power supply voltage stabilizing chip
U100 uses BD3572YHFP-M model chips, and the output end of pressure-stabilizing stably exports 5V voltages.
ACC state detection circuits include triode Q300, resistance R300, resistance R301, resistance R302, resistance R303, electricity
Hold C300.Triode Q300 base stage is connected to ACC inputs, resistance R303 and resistance R301 company through resistance R303, R301
Contact lead connection electric capacity C300 one end, electric capacity C300 other end ground connection, the company of resistance R303 and triode Q300 base stage
Contact lead is connected to resistance R302 one end, resistance R302 other end ground connection；Triode Q300 grounded emitter, it collects
Electrode draws ACC_DET output ends, and the colelctor electrode is connected to above-mentioned output end of pressure-stabilizing through resistance R300 in addition.The ACC_DET
Output end is connected with MCU module U202 external interrupt end RA2/INT, for providing ACC power supply status letter to MCU module U202
Number.
Triode Q300 turn-on condition is determined by input voltage ACC and resistance R301, resistance R302, resistance R303 resistances
It is fixed.When ACC output voltages are 12V, by setting resistance R301, R302, R303 resistance, make ACC output voltages in 7.5V-
During 8.5V, triode Q300 conductings；When ACC output voltages are 24V, by setting resistance R301, R302, R303 resistance, make
ACC output voltages are in 17V-18V, triode Q300 conductings.ACC_DET output ends output high electricity when triode Q300 is not turned on
It is flat, ACC_DET outputs low level when triode Q300 is turned on.
Watchdog reset circuit includes triple gate U200, house dog U201, resistance R200, electric capacity C200, C201, C202.
The model of triple gate can be 74LVC1G125, the model TPS3828-50 of house dog.Triple gate U200 OE ends make for control
Energy end, it is connected to above-mentioned ACC_DET output ends, and whether the signal control OE ends that triple gate U200 exports according to it enable, and enter
And control the break-make of gate circuit.
In particular circuit configurations, triple gate U200 VCC ends connect the output end of pressure-stabilizing, and tie point therebetween also draws
Line is connected to electric capacity C200 one end, electric capacity C200 other end ground connection；Triple gate U200 GND ends are also grounded.In addition, tri-state
Two connection ends are drawn at door U200 IN ends, wherein a connection end is grounded through resistance R200, the other end is connected to MCU module U202
RA5 ends, for receiving the feeding-dog signal of MCU module；Its OUT terminal is connected above-mentioned to transmit with house dog U201 WDI pins
Feeding-dog signal.When OE ends low level is effective, the output of normal " 0 " or " 1 " is presented in triple gate OUT terminal；When OE ends high level
When effective, triple gate OUT terminal is in high-impedance state.
WatchDog Timer is provided with house dog U201, can be triggered by the positive transition on WDI pins or negative saltus step, the positive jump
Become or negative saltus step is formed by the feeding-dog signal after triple gate is transmitted to WDI pins, and when WDI pins are hanging, house dog
Timer is closed.If timer is not triggered in time-out time (time-out time about 1.6S), house dog U201 RESET
Pin is changed into effective, and keeps about 200mS, while WatchDog Timer is also initialized.In addition, house dog U201
VDD pins connect the output end of pressure-stabilizing, and tie point also lead therebetween is connected to electric capacity C201 one end, electric capacity C201's
The other end is grounded, and its GND pin is also grounded.House dog U201 also includes a hand-reset input pin MR, when MR pins are
During low level, its RESET pin is effective.
MCU module U202 possesses for one and has sleep mode and can be called out by its external interrupt end RA2/INT external interrupt
Awake single-chip microcomputer, its vdd terminal connect the output end of pressure-stabilizing, and tie point also lead therebetween is connected to the one of electric capacity C202
End, electric capacity C202 other end ground connection, its VSS end is also grounded.MCU module U202 RESET ends and house dog U201 RESET
Pin is connected, and the RESET signal sent by house dog U201 RESET pins can reset MCU module U202.
Operation principle of the invention introduced below：
When ACC power-offs, the triode Q300 of ACC state detection circuits is not turned on, and now ACC_DET output ends are defeated
Go out high level.MCU module U202 RA2/INT ends receive the output signal of ACC_DET output ends, and use timing issuer
Formula, when inquiring RA2/INT ends and maintaining the high level of certain time length (duration may generally be 20-100mS), MCU module
U202 judges ACC_DET output ends output high level, and enters park mode.
It is connected in addition, ACC_DET output ends enable with triple gate U200 OE ends again, when ACC_DET output ends are high electricity
When putting down, and then making OE ends high level effective, triple gate OUT terminal is in high-impedance state, and the WDI pins equivalent to house dog U201 hang
Sky, WatchDog Timer are closed, so that whole MCU application circuits enter the method for operation of low quiescent current.
When ACC power supply openings, the triode Q300 conductings of ACC state detection circuits, now ACC_DET output ends output
Low level.
Generally, MCU module U202 RA2/INT terminations receive the low level of ACC_DET output ends, and outer interruption is called out
Wake up, so as to which MCU module U202 exits park mode, and MCU module U202 RA5 ends timing output feeds dog to house dog U201
Signal, the square wave that it is about 500mS in the cycle that the signal, which can be,.Meanwhile triple gate U200 OE ends are that low level is effective, triple gate
The output of normal " 0 " or " 1 " is presented in OUT terminal, and WDI pins can normally receive its output signal, and WatchDog Timer is activated,
And the timer by the positive transition of WDI pins or negative saltus step in time-out time internal trigger so that house dog enters normal use shape
State.The output of " 0 " or " 1 " of the triple gate U200, and the feeding-dog signal of 500mS square waves ensure that feeding dog is not timed-out,
House dog can enter normal operating condition.
If in said process, MCU module U202 is waken up failure, then RA5 ends can not export hello the dog letter of 500mS square waves
Number, WatchDog Timer is not triggered but after being activated in time-out time, and the RESET pins of watchdog circuit are effective, MCU module
U202 is reset, and then it is exited park mode and be waken up, and enhances the reliability of vehicle-mounted MCU application circuits.
Claims (10)
- A kind of 1. vehicle-mounted MCU application circuits using external house dog, it is characterised in that including：MCU module, ACC state-detections Circuit, triple gate, watchdog reset circuit；ACC state detection circuits can detect ACC power supply status, export ACC power state signals, and be signally attached to house dog and answer Position circuit and MCU module；Watchdog reset circuit includes house dog, and WatchDog Timer is provided with house dog；MCU module has Standby sleep mode；The watchdog reset circuit is controlled, directly or indirectly enabling or closing for WatchDog Timer according to ACC power state signals Close, the MCU module selects to enter or exit park mode according to ACC power state signals；When WatchDog Timer enables and MCU module is in park mode, watchdog reset MCU module makes it exit dormancy mould Formula.
- A kind of 2. vehicle-mounted MCU application circuits using external house dog as claimed in claim 1, it is characterised in that：Also include Voltage stabilizing power supplying circuit, the voltage stabilizing power supplying circuit include power supply voltage stabilizing chip and electric capacity C100, electric capacity C101, resistance R100, electric capacity R101, the model BD3572YHFP-M of power supply voltage stabilizing chip；1 pin of power supply voltage stabilizing chip draws two connection ends, wherein a connection end is connected to normal electrical input, another connection end warp Electric capacity C100 is grounded, and 3 pin ground connection, 4 pin draw two connection ends, wherein a connection end is grounded through resistance R101, another connection end It is connected through resistance R100 with 5 pin, and draws output end of pressure-stabilizing, output end of pressure-stabilizing output 5V voltages.
- A kind of 3. vehicle-mounted MCU application circuits using external house dog as claimed in claim 2, it is characterised in that：ACC states Detecting circuit includes triode Q300, resistance R300, resistance R301, resistance R302, resistance R303, electric capacity C300；Triode Q300 base stage is connected to ACC inputs, resistance R303 and resistance R301 tie point through resistance R303, R301 Lead connection electric capacity C300 one end, electric capacity C300 other end ground connection, the tie point of resistance R303 and triode Q300 base stage Lead is connected to resistance R302 one end, resistance R302 other end ground connection；Triode Q300 grounded emitter, its colelctor electrode draw ACC_DET output ends, and the colelctor electrode is also through resistance R300 connections To above-mentioned output end of pressure-stabilizing；When ACC power-offs, ACC_DET output ends output high level, when ACC electric power startings, the output of ACC_DET output ends Low level.
- A kind of 4. vehicle-mounted MCU application circuits using external house dog as claimed in claim 3, it is characterised in that：MCU module With external interrupt end RA2/INT, the RA2/INT ends are connected with the ACC_DET output ends and receive from it the ACC power supplys Status signal；When ACC power-offs, MCU module enters park mode, and when ACC electric power startings, MCU module can exit not Sleep mode.
- A kind of 5. vehicle-mounted MCU application circuits using external house dog as claimed in claim 4, it is characterised in that：House dog Reset circuit also includes triple gate, resistance R200, electric capacity C200, electric capacity C201, electric capacity C202；The model of triple gate 74LVC1G125, the model TPS3828-50 of house dog；The OUT terminal of triple gate is connected with the WDI pins of house dog；Triple gate OE ends be connected to the ACC_DET output ends, and receive from it the ACC power state signals to control the OE ends of triple gate Whether enable, and then control the output of its OUT terminal；When ACC electric power startings, OE ends low level is effective, and the output of normal " 0 " or " 1 " is presented in triple gate OUT terminal；Work as ACC During power-off, OE ends high level is effective, and high-impedance state is presented in triple gate OUT terminal.
- A kind of 6. vehicle-mounted MCU application circuits using external house dog as claimed in claim 5, it is characterised in that：Triple gate IN ends draw two connection ends, wherein a connection end is grounded through resistance R200, the other end is connected to the RA5 ends of MCU module, uses In the feeding-dog signal for receiving MCU module.
- A kind of 7. vehicle-mounted MCU application circuits using external house dog as claimed in claim 6, it is characterised in that：When the output of normal " 0 " or " 1 " is presented in triple gate OUT terminal, WDI pins normally receive its output signal, and house dog is fixed When device be activated；When high-impedance state is presented in triple gate OUT terminal, WDI pins are hanging, and WatchDog Timer is closed；The WatchDog Timer can be triggered by the positive transition on WDI pins or negative saltus step, and the positive transition or negative saltus step are by described Feeding-dog signal is formed；If timer is not triggered in time-out time, the RESET pins of house dog are effective.
- A kind of 8. vehicle-mounted MCU application circuits using external house dog as claimed in claim 7, it is characterised in that：MCU module RESET ends be connected with the RESET pins of house dog, the RESET signal sent by the RESET pins of house dog resets MCU Module.
- A kind of 9. vehicle-mounted MCU application circuits using external house dog as claimed in claim 8, it is characterised in that：When ACC electricity Source is opened, and when MCU module occur and can not exit park mode phenomenon, the RESET pins of house dog are effective, guarded the gate described in realization Dog, which resets MCU module, makes it exit park mode.
- A kind of 10. vehicle-mounted MCU application circuits using external house dog as claimed in claim 9, it is characterised in that：The VCC ends of the triple gate connect the output end of pressure-stabilizing, and tie point also lead therebetween is connected to electric capacity C200's One end, electric capacity C200 other end ground connection, the GND ends ground connection of triple gate；The VDD pins of the house dog connect the output end of pressure-stabilizing, and tie point also lead therebetween is connected to electric capacity C201 One end, electric capacity C201 the other end ground connection, house dog GND pin ground connection；House dog also includes hand-reset input and drawn Pin MR, when MR pins are low level, its RESET pin is effective；The vdd terminal of the MCU module connects the output end of pressure-stabilizing, and tie point also lead therebetween is connected to electric capacity C202's One end, electric capacity C202 other end ground connection, its VSS end is also grounded.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711294916.2A CN107817993A (en) | 2017-12-08 | 2017-12-08 | A kind of vehicle-mounted MCU application circuits using external house dog |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711294916.2A CN107817993A (en) | 2017-12-08 | 2017-12-08 | A kind of vehicle-mounted MCU application circuits using external house dog |
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| CN107817993A true CN107817993A (en) | 2018-03-20 |
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| CN201711294916.2A Pending CN107817993A (en) | 2017-12-08 | 2017-12-08 | A kind of vehicle-mounted MCU application circuits using external house dog |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108490227A (en) * | 2018-06-26 | 2018-09-04 | 重庆力华科技有限责任公司 | A kind of vehicle mounted multimedia product test circuit of control line superposition communication test instruction |
| CN113162602A (en) * | 2021-04-17 | 2021-07-23 | 青岛京先仪表有限公司 | Low-cost watchdog circuit design realized by using gate circuit |
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| CN101281414A (en) * | 2007-04-07 | 2008-10-08 | 深圳迈瑞生物医疗电子股份有限公司 | Controllable watchdog replacement system |
| CN204926065U (en) * | 2015-06-29 | 2015-12-30 | 厦门四信通信科技有限公司 | Trouble self -resuming device under CPU system degree of depth park mode |
| CN207488987U (en) * | 2017-12-08 | 2018-06-12 | 厦门微普电子科技有限公司 | A kind of vehicle-mounted MCU application circuits using external house dog |
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2017
- 2017-12-08 CN CN201711294916.2A patent/CN107817993A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101281414A (en) * | 2007-04-07 | 2008-10-08 | 深圳迈瑞生物医疗电子股份有限公司 | Controllable watchdog replacement system |
| CN204926065U (en) * | 2015-06-29 | 2015-12-30 | 厦门四信通信科技有限公司 | Trouble self -resuming device under CPU system degree of depth park mode |
| CN207488987U (en) * | 2017-12-08 | 2018-06-12 | 厦门微普电子科技有限公司 | A kind of vehicle-mounted MCU application circuits using external house dog |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108490227A (en) * | 2018-06-26 | 2018-09-04 | 重庆力华科技有限责任公司 | A kind of vehicle mounted multimedia product test circuit of control line superposition communication test instruction |
| CN108490227B (en) * | 2018-06-26 | 2023-09-05 | 重庆力华科技有限责任公司 | Vehicle-mounted multimedia product test circuit with control line overlapped with communication test instruction |
| CN113162602A (en) * | 2021-04-17 | 2021-07-23 | 青岛京先仪表有限公司 | Low-cost watchdog circuit design realized by using gate circuit |
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Effective date of registration: 20210902 Address after: 361000 No. 39, houshantou Road, Guankou Town, Jimei District, Xiamen City, Fujian Province Applicant after: CHINA AUTOMOBILE CUSTOMER AUTO PARTS (XIAMEN) Co.,Ltd. Address before: 361000 room 217, Qida fashion building, No. 16, Longshan Middle Road, Siming District, Xiamen City, Fujian Province Applicant before: XIAMEN MICROPERFECT TECHNOLOGY Co.,Ltd. |