Reserved I2C devices addresses vary based on the module. Find G2C1 and G2H2 addresses in the tables below.

G2C1 Reserved I2C Device Addresses

AddressDeviceDescription
0x38PCAP Controller PCAP controller on touch screen flex cable (if installed).
0x3EGPIO Port ExpanderGPIO port expander attached to GPIO port on connector J8.
0x55PCAP Controller PCAP controller on touch screen flex cable (if installed) (alt.).
0x68RTCReal-time clock module.

G2H2 Reserved I2C Device Addresses

Bus AddressDeviceDescription
00x0ACODEC
00x1DTemp Sensor
00x38PCAP ControllerPCAP controller on touch screen flex cable (if installed).
00x3EGPIO Port ExpanderGPIO port expander attached to GPIO port on connector J8.
00x68RTCReal-time clock module.

NOTE: Bus 0 is an internal I2C bus. Bus 1 is available on connector J21 (full-stuff modules only).