Raspberry Pi Pinout

BCM 0 (HAT EEPROM i2c Data)

Alt0Alt1Alt2Alt3Alt4Alt5
I2C0 SDASMI SA5DPI CLKAVEOUT VCLKAVEIN VCLK
  • Physical pin 27
  • BCM pin 0
  • Wiring Pi pin 30

These pins are generally reserved for i2c communication with an EEPROM.

Connect those pins for auto configuration, if the board provides the feature (check the board description for details of EEPROM functionality).