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Chapter 2 Hardware Installation
Chapter 2
LPC Connector
LPC
2
1
14
13
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.
Pin
Assignment
Pin
Assignment
1
CLK
2
LAD1
3
RST#
4
LAD0
5
FRAME#
6
3V3
7
LAD3
8
GND
9
LAD2
10
---
11
INT_SERIRQ
12
GND
13
5VSB
14
5V
2
10
9
1
1
Battery
19
2
10
9
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, KD632-C236/Q170 supports two extension modules for ad
-
ditional four COM ports. The EXT-RS232/RS485 card is connected to KD632-C236/Q170 via the
LPC connector. The illustrations below guide you how to connect the extension module to the
carrier board.
Connecting the EXT-RS232/RS485 Card to the Motherboard
LPC
COM
Top View
LPC
EXT-RS485
Bottom View
DFI Motherboard
EXT-RS232/RS485
Additional 4 COM
EXT-RS485
