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LPC Connector
LPC
The Low Pin Count Interface was defined by Intel
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.
Pin
Assignment
L_CLK
1
L_RST#
3
L_FRAME#
5
L_AD3
7
L_AD2
9
INT_SERIRQ
11
5VDU
13
Chapter 2 Hardware Installation
Chapter 2
14 13
2 1
Corporation to facilitate the industry's tran-
®
Pin
Assignment
L_AD1
2
L_AD0
4
3V3
6
GND
8
10
---
12
GND
5V
14
Connecting the EXT-RS232/RS485 Card to the Motherboard
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.
Note:
The system board used in the following illustrations may not resemble the actual one.
These illustrations are for reference only.
28
Top View
LPC
COM
Bottom View
LPC
EXT-RS485
EXT-RS485
DFI Motherboard
EXT-RS232/RS485
Additional 4 COM
www.dfi .com
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