
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
57
13.8 Transmit Path AIS Insertion Signals
Pin Name
Type
Pin
No.
Function
TPAISFP
Input
G33
The active high
transmit path alarm indication frame
pulse
signal (
TPAISFP
) marks the first path AIS assertion
request for the transmit SONET/SDH streams on TPAIS[4:1].
TPAISFP is sampled on the rising edge of SYSCLK.
TPAIS[1]
TPAIS[2]
TPAIS[3]
TPAIS[4]
Input
H31
G32
L27
K28
The active high Transmit Path Alarm Indication signal
(TPAIS) controls the insertion of path AIS in the transmit
stream on a per STS (AU) basis. A high level on TPAIS
forces the insertion of the all ones pattern into the
corresponding SPE and the payload pointer bytes (H1, H2
and H3).
TPAIS is sampled on the rising edge of SYSCLK.
13.9 Microprocessor Interface Signals
Pin Name
Type
Pin
No.
Function
CSB
Input
B24
The
active low chip select
(CSB) signal is low during
SPECTRA-9953 register accesses.
Note that if CSB is not required (i.e. register accesses
controlled using the RDB and WRB signals only), CSB must
be connected to an inverted version of the RSTB input.
RDB
Input
A26
The
active low read enable
(RDB) signal is low during a
SPECTRA-9953 read access. The SPECTRA-9953 drives the
D[15:0] bus with the contents of the addressed register while
RDB and CSB are low.
The
active low write strobe
(WRB) signal is low during a
SPECTRA-9953 register write access. The D[15:0] bus
contents are clocked into the addressed register on the rising
WRB edge while CSB is low.
WRB
Input
B25
D[15]
D[14]
D[13]
D[12]
D[11]
D[10]
D[9]
D[8]
D[7]
D[6]
D[5]
D[4]
D[3]
D[2]
D[1]
D[0]
I/O
C34
D33
E32
F31
G30
H29
J28
K27
F32
G31
D34
E33
E34
F33
H30
J29
The
bi-directional data bus
, D[15:0], is used during
SPECTRA-9953 read and write accesses.