PM5362TUPP-PLUS
DATA SHEET
PMC-951010
ISSUE 6
SONET/SDH TRIBUTARY UNIT PAYLOAD PROCESSOR / PERFORMANCE MONITOR
Pin Name Type
Pin
Function
No.
LPL
Output 140
The locked mode payload active signal (LPL)
identifies synchronous payload envelope bytes
on the outgoing stream. LPL is only active in
locked mode (OJ1EN register bit set low). LPL
is held low in floating mode (OJ1EN set high). If
locked mode is enabled (OJ1EN set low), LPL is
set high to mark synchronous payload envelop
bytes and set low to mark transport overhead
bytes. LPL is updated on the rising edge of
SCLK in outgoing byte interface mode
(OBMODE set high) or on the rising edge of
NSCLK in outgoing nibble interface mode
(OBMODE set low).
POHCK
Output 126
The tributary path overhead clock signal
(POHCK) provides timing to sample the
extracted tributary path overhead stream and
the receive alarm port. POHCK is nominally
9.72 MHz clock signals. The POH[3:1],
POHEN[3:1], POHFP[3:1] and RAD outputs are
updated on the falling edge of POHCK.
POH[3]
POH[2]
POH[1]
Output 76
109
The tributary path overhead signals (POH[3:1])
contains the tributary path overhead bytes (V5,
J2, Z6 and Z7) extracted from the ID[7:0] bus.
POH[3], POH[2] and POH[1] contain the
135
tributary path overhead bytes from STS-1 #1, #2
and #3, respectively. In AU4 mode, POH[3],
POH[2] and POH[1] contain the tributary path
overhead bytes from TUG3 #1, #2 and #3,
respectively. All four tributary overhead bytes of
each tributary is shifted out once per payload
frame. The corresponding POHEN signal is set
high to identify overhead bytes that are
presented for the first time. Each POH signal is
updated on the falling edge of POHCK.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
32
PMC [ PMC-SIERRA, INC ]
