PM5363 TUPP+622
TUPP+622
DATASHEET
PMC-1981421
ISSUE 4
SONET/SDH TRIBUTARY UNIT PAYLOAD PROCESSOR FOR 622 MBIT/S
INTERFACES
Pin Name
IAIS[4]
Type
Pin
Function
No.
Input
Y8
The incoming tributary alarm indication signal #4
(IAIS[4]) marks tributaries on the incoming STM-
STM-1 #4 stream that are in AIS state when
pointer interpreter bypass is enabled (PIBYP bit
set high). When pointer interpreter bypass is
disabled (PIBYP bit set low), IAIS[4] is ignored.
Also, IAIS[4] is ignored when IPL[4] is low.
In incoming STM-1 (STS-3) interface mode
(IHSMODEB set high), IAIS[4] is set high when
the associated tributary on the ID[31:24] is in
AIS state and is set low when the associated
tributary is operating normally. IAIS[4] is
sampled on the rising edge of SCLK.
In incoming STM-4 (STS-12) interface mode
(IHSMODEB set low), IAIS[4] is unused and
must be strapped low.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
38
PMC [ PMC-SIERRA, INC ]
