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Chapter 2 Hardware Installation
Chapter 2
The SMBus (System Management Bus) connector is used to connect SMBus devices. It is a
multiple device bus that allows multiple chips to connect to the same bus and enable each one
to act as a master by initiating data transfer.
SMBus Connector
SMBus
1
2
5
10
9
Battery
COM (Serial) Ports
10
9
Battery
The serial ports are asynchronous communication ports with 16C550A-compatible UARTs that
can be used with modems, serial printers, remote display terminals, and other serial devices.
1
BMC COM 5
GND
BMC TXD5
BMC RXD5
3V3SB
COM Port C
from PCH’s IE
HSUart
1
GND
SPC IE LVC3 RX
SPC IE LVC3 TX
Pin
Pin Assignment
Pin
Pin Assignment
1
3V3 AUX
2
GND
3
SMB HOST STBY LVC3 SCL
4
SMB HOST STBY LVC3 SDA
5
PU PCH TLS ENABLE STRAP