COMe-mAL10 – User Guide, Rev. 1.3
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4.6.
System Management (SM) Bus
The 8-bit SMBus address uses the LSB (Bit 0) for the direction of the device.
Bit0 = 0 defines the write address
Bit0 = 1 defines the read address
The 8-bit address listed below shows the write address for all devices. The7-bit SMBus address shows the device
address without bit0.
Table 23: SMBus Address
8-bit
Address
7-bit
Address
Device
Comment
SMBus
5Ch
2Eh
HWM NCT7802Y
Do not use under any circumstances
SMB
A0h
50h
SPD DDR Channel 1 (SO-DIMM)
SMB
A4h
52h
SPD DDR Channel 2 (SO-DIMM)
SMB
30h
18h
SO-DIMM Thermal Sensor
If available on the used memory-module
SMB
34h
1Ah
SO-DIMM Thermal Sensor channel 2
If available on the used memory-module
SMB
