cExpress-EL User’s Guide
PICMG COM.0 R3.0
Page 32
Copyright © 2021 ADLINK Technology, Inc.
4.3.7
LPC Bus
Name
Pin #
Description
I/O
PU / PD
Comment
LPC_AD0
LPC_AD1
LPC_AD2
LPC_AD3
B4
B5
B6
B7
LPC multiplexed address, command and data bus
I/O 3.3V
LPC_FRAME#
B3
LPC frame indicates the start of an LPC cycle
O 3.3V
LPC_DRQ0#
LPC_DRQ1#
B8
B9
LPC serial DMA request
I 3.3V
Not connected
LPC_SERIRQ
A50
LPC serial interrupt
I/O 3.3V
PU 8.2K 3.3V
LPC_CLK
B10
LPC clock output –33MHz nominal
O 3.3V
The LPC_CLK frequency is 24 MHz on this product
Note
: eSPI (in place of LPC) is BOM option supported by project basis