Lpc Connector - DFI SU171 User Manual

LPC Connector

The Low Pin Count Interface was defi ned by Intel
towards legacy free systems. It allows the integration of low-bandwidth legacy I/O components
within the system, which are typically provided by a Super I/O controller. Furthermore, it can be
used to interface fi rmware hubs, Trusted Platform Module (TPM) devices and embedded control-
ler solutions. Data transfer on the LPC bus is implemented over a 4 bit serialized data interface,
which uses a 24MHz LPC bus clock. For more information about LPC bus refer to the Intel
Pin Count Interface Specifi cation Revision 1.1'. The table below indicates the pin fuctions of the
LPC connector.
Pins Pin Assignment
1
CLK_24M
3
RST#
5
FRAME#
7
LAD3
9
LAD2
11
SERIRQ
13
5VSB
Chapter 2 Hardware Installation
Chapter 2
LPC Connector
13 1
14 2
® Corporation to facilitate the industry's transition
Low
®
Pins Pin Assignment
2
LAD1
4
LAD0
6
VCC3
8
GND
10
-
12
GND
14
5V
Connecting the EXT-RS232/RS485 Card to the Motherboard
With DFI's proprietary technology, SU171/SU173 supports two extension modules for additional
four COM ports. The EXT-RS232/RS485 card is connected to SU171/SU173 via the LPC connec-
tor. The illustrations below guide you how to connect the extension module to the motherboard.
Note:
The motherboard used in the following illustrations does not resemble the actual one.
These illustrations are for reference only.
28
Top View
LPC
COM
Bottom View
LPC
EXT-RS485
EXT-RS485
DFI Carrier Board
EXT-RS232/RS485
Additional 4 COM
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