How to read and write PCF79XX chip by vvdi prog

Xhorse VVDI Prog

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Guide to read and write PCF7953 chip by vvdi prog and Pcf79xx adapter.

VVDI prog+ PCF79XX-Adapter-V2:

Function: Read and write PCF79XX chip models incl. PCF7941/ PCF7952/ PCF7953/ PCF7961/ PCF7922/ PCF7945


1). Currently PCF79XX chip support lock, unlock and read/write data.

2). RENEW function will be added in the coming days, it will load corresponding data and directly renew key, the detailed specific car model data will be released.

Two optional ways to read write PCF79XX chip:

1).Remove the chip and put it in the IC socket, select option “PCF79XX chip”

2). Connect wire to the circuit board, select option “PCF79XX adapter”

Note: If PCF79XX adapter option can’t recognize chip due to the affection of circuit board, just remove chip and put it in IC socket, then use option “PCF79XX chip” to operate.

VVDI PROG software interface introduction:

1).“EEPROM”: data storage space, it can read & write in protected status.

2).“EROM”: program memory space (equal to other chip’s FLASH space), it can read & write in unprotected status.

3).“Protected”: click “Protected” to lock chip and unable to read out chip data.

4).“Unprotected”: click “Unprotected” to unlock chip and able to read out chip data.

After unlock, the original data in the chip will be cleared.

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