
PM5317 SPECTRA-9953 Telecom Standard Product Data Sheet
Release
Proprietary and Confidential to PMC-Sierra, Inc., and for its customers’ internal use.
Document No.: PMC-2000741, Issue 5
58
Pin Name
Type
Pin
No.
Function
A[14]/TRS
Input
D27
The
test register select signal
(TRS) selects between normal
and test mode register accesses. TRS is high during test
mode register accesses, and is low during normal mode
register accesses.
A[13]
A[12]
A[11]
A[10]
A[9]
A[8]
A[7]
A[6]
A[5]
A[4]
A[3]
A[2]
A[1]
A[0]
Input
B28
C27
D26
C28
A29
A30
B29
A31
B30
C29
D28
D29
A32
B31
The
address bus
(A[14:0]) selects specific registers during
SPECTRA-9953 register accesses.
RSTB
Schmidt
TTL Input
B22
The
active low reset
(RSTB) signal provides an
asynchronous SPECTRA-9953 reset. RSTB is a Schmidt
triggered input with an integral pull-up resistor.
ALE
Input
A24
The
address latch enable
(ALE) is an active-high signal and
latches the address bus A[14:0] when low. When ALE is high,
the internal address latches are transparent. It allows the
SPECTRA-9953 to interface to a multiplexed address/data
bus. The ALE input has an integral pull up resistor.
INTB
OD Output
B23
The
active low interrupt
(INTB) is set low when a SPECTRA-
9953 enabled interrupt source is active. The SPECTRA-9953
may be enabled to report many alarms or events via interrupts.
INTB is tri-stated when the interrupt is acknowledged via the
appropriate register access. INTB is an open drain output.
13.10 JTAG Test Access Port (TAP) Signals
Pin Name
Type
Pin
No.
Function
TCK
Input
B18
The
test clock
(TCK) signal provides timing for test
operations that can be carried out using the IEEE P1149.1
test access port.
An external pull-up is required on TCK.
The
test mode select
(TMS) signal controls the test
operations that can be carried out using the IEEE P1149.1
test access port. TMS is sampled on the rising edge of TCK.
TMS has an integral pull up resistor.
TMS
Input
B19
TDI
Input
A19
When the SPECTRA-9953 is configured for JTAG operation,
the
test data input
(TDI) signal carries test data into the
SPECTRA-9953 via the IEEE P1149.1 test access port. TDI
is sampled on the rising edge of TCK.
TDI has an integral pull up resistor.