40-Pin Debug Connector; Table 2: 40-Pin Debug Connector Pin Definition - ADLINK Technology COM Express cExpress-BT2 User Manual

4.2.

40-pin Debug Connector

FPC Connector Type: FCI 59GF Flex 10042867
Pin Orientation
1
40-pin Debug Connector Pin Definition on the COM Express Module
Pin Interface Signal
1 SPI VCC_SPI_IN
Program
interface
2 GND
3 SPI_BIOS_C
S0#
4 SPI_BIOS_C
S1#
5 SPI_BIOS_M
ISO
6 SPI_BIOS_M
OSI
7 SPI_BIOS_C
LK
8 LPC Bus 3V3_LPC
9 GND
10 BIOS_DIS0
11 RST#
12 CLK33_LPC
13 LPC_FRAME
#
14 LPC_AD3
15 LPC_AD2
16 LPC_AD1
17 LPC_AD0
18 BMC 3.3V_BMC
Program
interface
19 3.3V_BMC
20 GND
Note: The pin definition on the debug module is the inverse of that on the COM Express module.
28
40
Remark
SPI Power Input from flash
tool to module. HW need add
MOS FET to switch SPI power
for SPI ROM
System power 3.3V provide
from COM module
always power 3.3V provide
from COM module
always power 3.3V provide
from COM module
always power 3.3V provide
from COM module

Table 2: 40-pin Debug Connector Pin Definition

Pin Interface Signal
21 BMC TXD6
Program
interface
(cont'd)
22 RXD6
23 FUMD0
24 RESET_IN#
25 DATA
26 CLK
27 OCD0A
28 OCD0B
29 Test points PWRBTN#
30 SYS_RESET#
31 CB_RESET#
32 CB_PWROK
33 SUS_S3#
34 SUS_S4#
35 SUS_S5#
36 BMC POSTWDT_DI
Debug S#
signals
37 SEL_BIOS
38 BIOS_MODE
39 BMC_STATUS
40 Reserved
Remark
Include a jumper to
connect OCD0A via 1K0
pull-up to 3.3V_BMC
Include a jumper to
connect OCD0A via 1K0
pull-up to 3.3V_BMC
Connect to Jumper for
Debug
Connect to Jumper for
Debug
Connect to Jumper for
Debug
Module Interfaces