GE Mini COM Express 10, Hardware Reference Manual

Page: 40 / 82

5.1.2 JTAG Connector
A 23-pin 0.3 mm (0.01 in) pitch flexible printed circuit receptacle provides access to the
board JTAG chain to allow programming of the FPGA, processor debug access, and
manufacturing board test. The mating cable is Molex series 15015.
5.1.2.1 Pin Assignments
JTAG Pin Assignments
Pin #
Signal
1 GND
2
BOARD_SEL#
3
APU_SEL#
4
SMB_CLK
5 GND
6
DBREQ#
7
SMB_DAT
8 DBRDY
9 GND
10 TDI
11
DBG_RESET#
12 TMS
13 GND
14
+1.8V_STBY
15 GND
16
+1.8V_STBY
17
DBG_PWRBTN#
18 TDO
19 GND
20 TRST#
21
APU_RST#
22 TCK
23 GND
TCK , TMS , TDI , TDO , and TRST# are the standard IEEE 1149.1 JTAG signals.
BOARD_SEL# and APU_SEL# are used to control insertion and removal of certain devices
within the JTAG chain. Refer to the section, Memory .
DBRDY , DBREQ# , APU_RST# , DBG_PWRBTN# , and DBG_RESET# are processor debug
signals.
SMB_CLK and SMB_DAT are wired to SMBus 0, which connects to the memory SPD
EEPROM.
40 GFK-2896 Mini COM Express Type 10 Module mCOM10-L1500
For public disclosure