User Guide • SC5-FESTIVAL • CompactPCI
®
Serial CPU Board
Local SMB/I
2
C Devices
The SC5-FESTIVAL 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 containing board configuration data, the supply voltage/temperature controlling device
NCT7491, a set of board control and status registers as well as two general purpose, non-volatile
electronic jumpers. Additional devices may be connected to the different I
2
C controllers of the CM238
via the
CompactPCI
®
Serial backplane signals I
2
C_SCL (P1 B2) and I
2
C_SDA (P1 C2) or the mezzanine
expansion connectors P-HSE2 or P-EXP.
Controller
Address
Description
SMBus
0x2C
Hardware Monitor/Memory Down Temperature Sensor (7491)
SMBus
0x2E
Board Control/Status
SMBus
0x2F
Non-volatile Electronic Jumper
SMBus
0x50
0x36/0x37
SPD EEPROM of On-board Memory 4KBit
EEPROM Select Bank 0/1
SMBus
0x52
0x36/0x37
SPD EEPROM of SODIMM 4KBit
EEPROM Select Bank 0/1
SMBus
0x57
General Purpose EEPROM 2KBit
I2C[0]
1)
P-HSE2 (Pins A22/A23), P-EXP (Pins 29/30)
I2C[1]
1)
Serial Backplane Connector P1 (Pins B2/C2)
1)
Address depends on devices attached
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