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fi
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Chapter 2 Hardware Installation
Chapter 2
LPC Connector
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 fuctions of the LPC connector.
LPC
2 1
1413
Note:
The system board used in the following illustrations may not resemble the actual one.
These illustrations are for reference only.
With DFI’s proprietary technology, CS100-Q370/C246/H310 supports two extension modules for
additional four COM ports. The EXT-RS232/RS485 card is connected to CS100-Q370/C246/H310
via the LPC connector. The illustrations below guide you how to connect the extension module to
the motherboard.
LPC
COM
Top View
LPC
EXT-RS485
Bottom View
DFI Motherboard
EXT-RS232/RS485
Additional 4 COM
Connecting the EXT-RS232/RS485 Card to the Motherboard
Pin
Function
Pin
Function
1
L_CLK
2
L_AD1
3
L_RST#
4
L_AD0
5
L_FRAME#
6
3V3
7
L_AD3
8
GND
9
L_AD2
10
---
11
INT_SERIRQ
12
GND
13
5VSB
14
5V
EXT-RS485
