26
Connector Pinouts on Module
4.2. 40-pin Debug Connector
FPC Connector Type:
Molex 502790-4091
Pin Orientation
1
40
40-pin Debug Connector Pin Definition on the COM Express Module
Pin Interface
Signal
Remark
Pin
Interface
Signal
Remark
40
VCC_SPI_I
N
20
TXD6
39
GND
19
RXD6
38
SPI_BIOS_
CS0#
18
FUMD0
37
SPI_BIOS_
CS1#
PU 10k 3.3VSB
17
RESET_IN#
PU 10k 3.3VSB
36
SPI_BIOS_
MISO
16
DATA
PU 2.2k 3.3VSB
Equivalent
35
SPI_BIOS_
MOSI
15
CLK
PU 2.2k 3.3VSB
Equivalent
34
SPI
Program
interface
SPI_BIOS_
CLK
14
OCD0A
33 3V3_LPC
13
BMC
Program
interface
(cont’d)
OCD0B
32
GND
12
PWRBTN#
PU 10k 3.3VSB
31
BIOS_DIS0
PU 10k 3.3VSB
11
SYS_RESET
#
PU 10k 3.3VSB
30
RST#
10
CB_RESET#
PU 1k 3.3VSB
29
CLK33_LP
C
9
CB_PWROK
28
LPC_FRAM
E#
8
SUS_S3#
27
LPC_AD3
7
SUS_S4#
26
LPC_AD2
6
Test
points
SUS_S5#
25
LPC_AD1
5
POSTWDT_D
IS#
PU 100k 3.3VSB
24
LPC Bus
LPC_AD0
4
SEL_BIOS
23
3.3V_BMC
3
BIOS_MODE
22
3.3V_BMC
2
BMC
Debug
signals
BMC_STATU
S
21
BMC
Program
interface
GND
1 Reserved
Tied to GND through
0ohm resistor
Table 2: 40-pin Debug Connector Pin Definition
Note:
The pin definition on the debug module is the inverse of that on the COM Express module.
