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SMBus Connector
Battery
9
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.
Pin
Pin Assignment
3V3 AUX
1
3
SMB HOST STBY LVC3 SCL
PU PCH TLS ENABLE STRAP
5
Chapter 2 Hardware Installation
Chapter 2
SMBus
2
1
5
Pin
Pin Assignment
GND
2
SMB HOST STBY LVC3 SDA
4
COM (Serial) Ports
Battery
BMC COM 5
GND
BMC TXD5
BMC RXD5
1
3V3SB
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.
25
COM Port C
from PCH's IE
SPC IE LVC3 RX
HSUart
GND
SPC IE LVC3 TX
1
9
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