Long time ago I got an XTW100 Mini Programmer and because it came without documentation I began by analyzing the hardware which resulted in tracing of its schematic. This is yet another cheap Chinese serial programmer for I2C and SPI memory chips based on STM32 microcontroller. Last time I managed to break its firmware by attempting to read it from the microcontroller. However, I got a new programmer and I’m ready to do some tests with it.
This time I will stay away from the programming port to avoid firmware damage. I will therefore focus solely on using it for the intended purpose: reading and writing memory ICs. I got myself two chips, the I2C EEPROM 24C02 and the SPI flash memory which will be used for tests. I talked about the software utility which you can use with this programmer in a previous post.