Organization of the Board
MEN Mikro Elektronik GmbH
41
20BC50R00 E1 – 2015-09-07
4
Organization of the Board
4.1
SMBus Devices
The controller hub of the BC50R has two SMB controllers. The devices responsible
for board supervision and hardware control (SPD, BC) are connected to SMB0. The
devices related to information and board functions (e.g. EEPROMs, sensors, GPIO
controllers) are connected to SMB1.
Table 15.
SMBus address of EEPROM
Table 16.
SMBus devices
4.2
SMBus Overview
The PCI Express Mini Cards, the microSIM cards, the photocouplers, the GNSS
module and the binary inputs can all be controlled using the SMBus and two I/O
expanders.
Two I/O expanders and a system EEPROM are connected to the SMBus.
Address
Function
0xAC
EEPROM, includes system information e.g. serial
number and the date of production.
SMBus
8-Bit-Address
7-Bit-Address
Function
0
0xA0
0x50
SPD EEPROM
0
0xA2
0x51
SPD EEPROM for stacked memory
0
0x9A
0x4D
Board Controller (PIC)
0
0x64
0x32
External real-time clock ERTC
1
0xAE
0x57
Board information EEPROM with
thermal sensor
1
0x3E
0x1F
Thermal sensor of the EEPROM
1
0xE0
0x70
FPGA for SATA SGPIO
MEN offers a driver for accessing the SMBus. See
MEN’s website.
