SPRUJ64 September 2022
The AM64x processor is identified by its version and serial number, which are stored in the onboard EEPROM. The Board ID memory is configured to respond to address 0x51. AT24C512C-MAHM-T from Microchip is used, and is interfaced to the I2C0 port of the SOC. The I2C address of the EEPROM can be modified by driving the A0, A1, A2 pins to LOW. The write-protect input, when connected to GND, allows normal write operations. When the WP pin is connected directly to VCC, all write operations to the protected memory are inhibited. If the pin is left floating, the WP pin will be internally pulled down to GND. WP is connected through GND through a 10k resistor.