User Guide

FIRST INTERNATIONAL COMPUTER,
INC.
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26
4.10 SMBus Devices
The SMBus is a two-wire interface through which the system can communicate
with power-related chips. The BIOS should initialize the SMBus devices during
POST.
4.10.1 Ich4 SMBus Connection Devices
SMBus Device Host/Slave Addre
ss
BIOS Need to Initialization
SO-DIMM Slave A0h/A
2h
Memory Auto Sizing (SPD).
CY28346
CLK Generator
Slave D2h Program the desired clock
frequency (Pin23 output
24MHz, Pin22 output 48MHz)
4.10.2 PMU 08 SMBus Connection Devices
SMBus Device Host/Slave Addre
ss
A7 ~
A1
BIOS Need to Initialization
PMU08 Master 10h Enable PS01 decode interface
MAX6690 (Thermal
sensor)
Slave 9Ch Program the desired
temperature range
Battery (1
st
Battery) Slave A8h No Need
4.11 Resource Allocation
4.11.1 I/O Map
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