PC4-PRESTO • CompactPCI
®
PlusIO • 4
th
Generation Intel
®
Core™-4xxx Processor
Local SMB Devices
The PC4-PRESTO contains devices that are attached to the System Management Bus (SMBus). These
are the SPD EEPROMs for the on-board memory or the possibly plugged SODIMM, a general purpose
serial EEPROM, a supply voltage/temperature controlling device and a set of board control and status
registers. Additional devices may be connected to the SMBus via the CompactPCI
®
Serial backplane
signals I
2
C_SCL (P1 B2) and I
2
C_SDA (P1 B3), or pins 29/30 of the mezzanine expansion connector
P-EXP.
Address
Description
0x58
Hardware Monitor/Memory Down Temperature Sensor (LM87)
0x5C
Board Control/Status
0xA0
SPD of On-board Memory
0xA4
SPD of SODIMM
0xAE
General Purpose EEPROM
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