RELEASED
PM73123 AAL1GATOR-8
DATASHEET
PMC-2000097
ISSUE 2
8 LINK CES/DBCES AAL1 SAR
JTAG/TEST Signals(5)
Pin Name Type
Pin No. Function
TCLK
Input
B3
The test clock signal provides timing for
test operations tat can be carried out
using the JTAG test access port.
TMS
Input
A3
The test mode select signal controls the
test operations that can be carried out
using the JTAG test access port.
Maintain TMS tied high when not using
JTAG logic.
Internal
Pull-up
TDI
Input
C4
The test data input signal is JTAG serial
input data
Internal
Pull-up
TDO
Output B5
The test data output signal is JTAG
serial output data.
SCAN_ENB
Input
A14
An active low signal which, in SCAN
mode, is used to shift data. This signal
should be tied high for normal operation.
Internal
Pull-up
SCAN_MODEB Input
Internal
Pull-up
W3
When tied low enable SCAN mode.
This signal should be tied high for
normal operation.
TRSTB
Schmitt Y19
Trigger
Input
The active low test reset signal is an
asynchronous reset for the JTAG
circuitry.
Internal
Pull-up
If JTAG logic will be used, one option is
to connect TRSTB to the RSTB input,
and keep TMS tied high while RSTB is
high; this maintains the JTAG logic in
reset during normal operation.
If JTAG logic will not be used, use the
option described above, or simply
ground TRSTB.
RESERVED_O
UT
AB20
W22
Not used, leave unconnected
RESERVED_IN
Not used, tie to ground.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
60
PMC [ PMC-SIERRA, INC ]
