Kontron SMARC-sA3874i Manual do Utilizador descarregar pdf (Página 42)

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User’s Guide

All five I2C busses originate in the multi-master capable I2C controllers within the TI Cortex A8 SoC. The only I2C

devices on the sA3874i 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

TI TPS65911C

PMU

U15

0x2D

0x5B

0x5A

General purpose usage

address

0x12

0x25

0x24

Voltage scaling address

On Semi NCT72

Thermal Sensor

U26

0x4C

0x99

0x98

2 temperatures can be

read:

CPU Thermal diode

+board ambient

Atmel AT24C02

EEPROM

U24

0x50

0xA1

0xA0

General purpose

parameter EEPROM

Serial number, etc in

PICMG EEEP format

Altera

5M240ZM100C5N

CPLD

U20

General purpose logic

As the name implies (PM == “Power Management), this I2C bus is used by low level software for system power

management. PMU regulator is attached to this bus and various voltage levels and options are continuously

modified over this interface. So – use care if accessing this interface.

1 2 ... 37 38 39 40 41 42 43 44 45 46 47 ... 79 80

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