Kontron SMARC Evaluation Carrier - Manual (Page 58)

User’s Guide
58 www.kontron.com
15 I2C Buses and Devices
15.1 I2C Bus Summary
There are five I2C buses defined in the SMARC specification: PM (Power Management), LCD (Liquid Crystal Display),
GP (General Purpose), CAM (Camera) and HDMI. There are I2C devices on the Evaluation Carrier for four of these: the
PM, LCD, GP and CAM I2C buses, per the following table. There are no Evaluation Carrier board I2C devices on the ULP-
COM HDMI I2C bus. More details on the individual devices are given in the following sections. Items shown in the
shaded rows are not present on the Evaluation Carrier and are shown for illustration as to what else might appear on an
I2C bus scan.
I2C Device Summary Chart:
# Device Description Ref Des Address(7 bit) Address(8 bit) Notes
I2C_PM Bus
1 TI TCA9554 IO Expander U35 0x22 0x44 / 0x45 Power Enables (Outputs)
2 TI TCA9554 IO Expander U34 0x24 0x48 / 0x49 Power Status (Inputs)
3 Atmel AT24C32D EEPROM U37 0x57 0xAE / 0xAF
Should have PICMG EEP
data structure
4
BQ27510-G2 or
BQ34Z100
Fuel Gauge U8/U23 0x55 0xAA / 0xAB
5 TI TPS65911C PMU U7 0x2D 0x5A / 0x5B On Kontron’s SMARC
sAT30 Module. Other ULP-
COM Modules may have
different devices, at
different addresses,except
for the EEPROM which
should be the same
6 On Semi NCT72 Thermal Sensor U5 0x4C 0x98 / 0x99
7 Atmel AT24C32D EEPROM U9 0x50 0xA0 / 0xA1
8 TI TPS62361 Buck Regulator U8 0x60 0xC0 / 0xC1
I2C_LCD Bus
1 Atmel AT24HC02 EEPROM U29 0x55 0xAA / 0xAB For test
2 Atmel AT24HC02 EEPROM U1 0x50 0xA0 / 0xA1 On KLAS NEC board
I2C_GP Bus
1 AtmelAT24HC02 EEPROM U26 0x56 0xAC / 0xAD For test
2
STMicro
LIS302DL
Accelerometer U1 0x1C 0x38 / 0x39
3 TI TCA9554 IO Expander U44 0x20 0x40 / 0x41 GPIO readback / test
4 TI TCA9554 IO Expander U43 0x21 0x42 / 0x43
GPIO readback / test and