Read & Write PCF79XX by Iprog+ & VVDI Prog

There are two solutions to read and write PCF79xx: Iprog+ clone + PCF79XX SD-card adapter or Xhorse VVDI Prog programmer + PCF79XX Adapter


  1. Iprog+ clone + PCF79XX SD-card adapter

Read Write Pcf79 001





Read and write the above PCF79XX chip through MSDA, MSCL lines.


Example: Read PCF79XX eeprom by iprog + pcf79xx adapter


  1. VVDI Prog  + PCF79XX Adapter

Read Write Pcf79 002









PCF79XX chip functions:



√Read data

√Write data


VVDI-Prog PCF79XX options instruction:

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.

Read Write Pcf79 003


How to read & write PCF79XX chip with VVDI Pro + PCF79XX Adapter?

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

Read Write Pcf79 004


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

Read Write Pcf79 005