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Chapter 2 - Hardware Installation
29
LPC Connector
2
2
G2
I C
Ba
ttery
The Low Pin Count Interface was defined by Intel
®
Corporation to facilitate the industry’s tran-
sition towards legacy free systems. It allows the integration of low-bandwidth legacy I/O com-
ponents within the system, which are typically provided by a Super I/O controller. Furthermore,
it can be used to interface firmware hubs, Trusted Platform Module (TPM) devices and embed-
ded controller solutions. Data transfer on the LPC bus is implemented over a 4 bit serialized
data interface, which uses a 33MHz LPC bus clock. For more information about LPC bus refer
to the Intel
®
Low Pin Count Interface Specification Revision 1.1’. The table below indicates the
pin functions of the LPC connector.
▼ LPC Pin Assignment
Pin Assignment Pin Assignment
1 L_CLK 2 L_LAD1
3 L_RST# 4 L_LAD0
5 L_FRAME# 6 3.3V
7 L_LAD3 8 GND
9 L_LAD2 10 ---
11 SERIRQ 12 GND
13 5VSB 14 5V
▲ LPC Connector
13 14
1 2
External COM Port Module
The external COM port modules — EXT-RS232 and EXT-RS485 — are designed by DFI’s pro-
prietary technology, and support four additional COM ports per module. The EXT-RS232/RS485
card is connected to the motherboard via the LPC connector and secured by a standoff as il-
lustrated below.
Top View Bottom View
EXT Module
LPC Connector
Standoff
Standoff Screw
LPC Headers
COM Headers
Motherboard
Top View Bottom View
EXT Module
LPC Connector
Standoff
Standoff Screw
LPC Headers
COM Headers
Motherboard
Note:
The EXT-RS232/RS485 modules are optional peripherals that are not included in
the standard package. For more information, please contact DFI sales representa-
tives or visit go.dfi.com/EXT-RS232 , and go.dfi.com/EXT-RS485 .
► Internal I/O Ports