PCF PROG

Useful tool with PCF7941, PCF7953, PCF7945, PCF7952 and other similar MCU's support, used in car keys and tire pressure sensors.

PCFprog allows reading and programming of PCF79xx based MCU's widely used in vehicle keys and tire pressure sensors. With the help of this tool you can renew used SmartKeys with PCF7941, PCF7953, PCF7945, PCF7952 and similar PCF79xx MCUs, as well as use it for more advanced features: moving ID to other address, changing ID and other interesting things.

PCF Prog has really small dimensions (52x34x14mm) and connects it to the computer with a USB type B cable.
The outputs of the programmer is basic 5-pin "gold pin" connector. The set does not include a USB cable, test leads or instruction.
The basic functions are easy to use and shouldn't cause any problem;More advanced operations require a bit of transponders knowledge.

Sample screenshots of PCF-Prog software:

PCF PROG - PCF7941, PCF7953, PCF7945, PCF7952 and similar PCF79xx MCUs PROGRAMMER

PCFprog - Useful tool for PCF79xx MCU's programming & unlock used car keys

Basic step by step guide for renew used vehicle key with PCFprog programmer:

☛ Disassemble the key and remove battery;
☛ Connect a power supply from programmer to the key;
☛ Connect MSDA and MSCL from programmer to the key (if MCU will not wake up, you need to connect WUP line also);
☛ Start software, select "SETTINGS" and choose proper EEPROM size (EEPROM size you can check it in key file folder);
☛ Select proper KEY MCU type (PCF7945/52/53 or PCF7941/61);
☛ Execute "ERASE" function. Software should respond DONE->SUCCESS;
☛ Select "EEPROM", "FILE LOAD", choose EEPROM file, push WRITE. Software should respond EEPROM WRITE:FINISHED;
☛ Select "EROM", "FILE LOAD", choose EPROM file, push write function. Software should respond EEPROM WRITE:FINISHED;
☛ Select "CHIP" and utilise "Protect" function. If procedure executed correctly software should respond DONE->SUCCESS.

Summary

We use PCF Prog from a long time without any problems. Programmer works similar (and often more effective) than more expensive devices for programming PCF79xx MCU's & renew used automotive keys. However, with PCFprog will not get big support, instructions etc. So, if you are a beginner, consider simpler and "automatic" tools with full support.