Express-HLE
Page 33
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40-pin Pin Description on the COM Express Module
Pin Interface Signal
Remark
Pin Interface
Signal
Remark
1
VCC_SPI_IN
SPI Power Input from flash tool
to module. HW need add MOS
FET to switch SPI power for SPI
ROM
21
TXD6
2 GND
22
RXD6
3 SPI_BIOS_CS0#
23
FUMD0
4 SPI_BIOS_CS1#
24
RESET_IN#
5 SPI_BIOS_MISO
25
DATA
6 SPI_BIOS_MOSI
26
CLK
7
SPI
Program
interface
SPI_BIOS_CLK
27
OCD0A
Include a jumper to connect
OCD0A via 1K0 pull-up to
3.3V_BMC
8
3V3_LPC
System power 3.3V provide from
COM module
28
BMC Program
interface
(continued)
OCD0B
Include a jumper to connect
OCD0A via 1K0 pull-up to
3.3V_BMC
9 GND
29
PWRBTN#
10 BIOS_DIS0
30
SYS_RESET#
11 RST#
31
CB_RESET#
12 CLK33_LPC
32
CB_PWROK
13 LPC_FRAME#
33
SUS_S3#
14 LPC_AD3
34
SUS_S4#
15 LPC_AD2
35
Test points
SUS_S5#
16
LPC_AD1
always power 3.3V provide from
COM module
36
POSTWDT_DIS# Connect to Jumper for
Debug
17
LPC Bus
LPC_AD0
37
SEL_BIOS
Connect to Jumper for
Debug
18
3.3V_BMC
always power 3.3V provide from
COM module
38
BIOS_MODE
Connect to Jumper for
Debug
19
3.3V_BMC
always power 3.3V provide from
COM module
39
BMC Debug
signals
BMC_STATUS
20
BMC
Program
interface
GND
40
Reserved
Note:
The pin description on the debug module is the inverse of that on the COM Express module.
