There are at least two hardware versions of the module, the original using a 1Mbit SPI flash ST M45PE10 [[Media:STM45PE10.pdf]] and a newer version which I had using a very tiny chip labeled "5A32" and I think "8936" but it might be "B936". Note the circle in this image shows a 10k resistor from pin 5 WP to GND, which the ST M45PE10 datasheet indicates will write-protect the first 64K. If you would like to disable this protection, remove the resistor and solder pin 5 to pin 6 VCC. | There are at least two hardware versions of the module, the original using a 1Mbit SPI flash ST M45PE10 [[Media:STM45PE10.pdf]] and a newer version which I had using a very tiny chip labeled "5A32" and I think "8936" but it might be "B936". Note the circle in this image shows a 10k resistor from pin 5 WP to GND, which the ST M45PE10 datasheet indicates will write-protect the first 64K. If you would like to disable this protection, remove the resistor and solder pin 5 to pin 6 VCC. |