PMC-Sierra, Inc.
PM5356
S/UNI-622-MAX
DATASHEET
S/UNI-622-MAX
PMC-1980589
ISSUE 5
SATURN USER NETWORK INTERFACE (622-MAX)
Pin Name
Type
Pin
No.
Function
RSTB
Input
B10
The active-low reset (RSTB) signal provides an asynchronous
S/UNI-622-MAX reset. RSTB is a Schmitt triggered input with
an integral pull-up resistor.
CSB must be held high when RSTB is low in order to properly
reset this chip.
ALE
Input
A10
C14
The address latch enable (ALE) is active-high and latches the
address bus A[8:0] when low. When ALE is high, the internal
address latches are transparent. It allows the S/UNI-622-MAX
to interface to a multiplexed address/data bus. ALE has an
integral pull-up resistor.
INTB
Output
The active-low interrupt (INTB) signal is set low when a S/UNI-
622-MAX interrupt source is active and that source is
unmasked. The S/UNI-622-MAX may be enabled to report
many alarms or events via interrupts.
Examples of interrupt sources are loss of signal (LOS), loss of
frame (LOF), line AIS, line remote defect indication (LRDI)
detect, loss of pointer (LOP), path AIS, path remote defect
indication and others.
INTB is tri-stated when the all enabled interrupt sources are
acknowledged via an appropriate register access. INTB is an
open drain output.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
31
PMC [ PMC-SIERRA, INC ]
