Kontron SMARC-sAT30 User Manual
Page 42
User’s Guide
42
All five I2C busses originate in the multi-master capable I2 controllers within the T30 SoC. The only I2C devices on the
sAT30 Module are on the I2C PM bus. Those devices and their address details are listed in the following table:
#
Device
Description
Ref Des
Address
(7 bit)
Address
(8 bit)
Notes
Read
Write
I2C_PM Bus
1
TI TPS65911C
PMU
U7
0x2D
0x5B
0x5A
General purpose usage
address
0x12
0x25
0x24
Voltage scaling address
2
On Semi NCT72
Thermal Sensor
U5
0x4C
0x99
0x98
2 temperatures can be
read:
CPU Thermal diode +board
ambient
3
Atmel AT24C32D
EEPROM
U9
0x50
0xA1
0xA0
General purpose
parameter EEPROM
Serial number, etc in
PICMG EEEP format
4
TI TPS62361
Buck Regulator
U8
0x60
0xC1
0xC0
CPU Core Voltage
Regulator
As the name implies (PM == “Power Management), this I2C bus is used by low level software for system power
management. Two of the Module power regulators are attached to this bus and various voltage levels and options are
continuously modified over this interface. So – use care if accessing this interface.