Jtag Interface - Huawei ME909 Series Hardware Manual

HUAWEI ME909 Series LTE LGA Module
Hardware Guide

3.10 JTAG Interface

The ME909 module provides Joint Test Action Group (JTAG) interface. Table 3-12
shows the signals on the JTAG interface. It is recommended that route out the 9 pins
as test points on the DTE for tracing and debugging.
Table 3-12 Signals on the JTAG interface
Pin
No.
30
36
42
72
87
93
14
47
32
Issue V0.3 (2013-05-21)
Pin Name
JTAG_TMS
JTAG_TRST_N
JTAG_TCK
JTAG_TDO
JTAG_TDI
JTAG_RTCK
PS_HOLD
JTAG_SRST_N
VCC_EXT1
It is recommended that customer route out the JTAG pins on the DTE board as test points for
debugging.
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Copyright © Huawei Technologies Co., Ltd.
Description of the Application Interfaces
I/O Description
I JTAG test mode
selection
I JTAG test reset
I JTAG test clock
O JTAG test data
output
I JTAG test serial
data input
O JTAG test clock
return signal
I Power supply hold
signal to PMU
JTAG reset for
I
debugging
Pin for output
P power supply with
1.8 V
DC Characteristics (V)
Min. Typ. Max.
–0.3
1.8 2.1
–0.3
1.8 2.1
–0.3
1.8 2.1
–0.3
1.8 2.1
–0.3
1.8 2.1
–0.3
1.8 2.1
–0.3
1.8 2.1
–0.3
1.8 2.1
1.75 1.8 1.85
37