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JTAG 20-pin header connector, P2
The JTAG connector on the module is keyed , as are the two connectors on the JTAG
adapter, which means there is only one way to attach ribbon cables to the module
and JTAG adapter. For details, see “JTAG adapter assembly” on page 16.
JTAG header connector, P2
Pin assignment
www.digiembedded.com
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Signal
3.3V
3.3V
TRST#
GND
TDI
GND
TMS
GND
TCK
GND
RTCK
GND
TDO
GND
DBSRST#
GND
N/A
GND
BISTEN#
GND
Description
ARM9 I/O supply
ARM9 I/O supply
Test mode reset
Ground
Test data in
Ground
Test mode select
Ground
Test clock
Ground
Returned test clock (ARM core only)
Ground
Test data out
Ground
System reset
Ground
N/A
Ground
ARM9 mode select:
? ? Debug
= Pull high: 220 ohms to pin 2 (3.3V)
? ? Boundary
scan / normal = Pull low: 220 ohms
to pin 20 (GND)
Ground
15
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