PM5363 TUPP+622
TUPP+622
DATASHEET
PMC-1981421
ISSUE 4
SONET/SDH TRIBUTARY UNIT PAYLOAD PROCESSOR FOR 622 MBIT/S
INTERFACES
Pin Name
Type
Pin
No.
Function
POHFP[10] Output AA8 The tributary path overhead frame pulse
(POHFP[12:10]) signals may be used to locate
POHFP[11]
POHFP[12]
AB9
AA10
the individual path overhead bits of each
tributary for the corresponding STS-1 (TUG3) in
the incoming STM-1 #4 stream. Each POHFP
signal is set high to mark bit 1 (the most
significant bit) of the V5 byte of the first tributary.
POHFP[10], POHFP[11] and POHFP[12] identify
frame boundaries of the tributary path overhead
bytes from STS-1 (AU3) #1, #2 and #3,
respectively. In AU4 mode, POHFP[10],
POHFP[11] and POHFP[12] identify frame
boundaries of TUG3 #1, #2 and #3, respectively.
Each POHFP signal is updated on the falling
edge of POHCK.
POHEN[1]
POHEN[2]
POHEN[3]
Output L3
The tributary path overhead enable
(POHEN[3:1]) signals may be used to identify
tributary path overhead bytes that are being
presented on the corresponding POH stream of
STM-1 #1 for the first time. Each POHEN signal
is set high when a fresh overhead byte is
available on the corresponding POH stream.
POHEN is set low when the tributary path
overhead byte available on the corresponding
POH stream has already been shifted out in a
previous frame. POHEN[1], POHEN[2] and
POHEN[3] identify the status of tributary path
overhead bytes from STS-1 (AU3) #1, #2 and
#3, respectively. In AU4 mode, POHEN[1],
POHEN[2] and POHEN[3] identify the status of
tributary path overhead bytes from TUG3 #1, #2
and #3, respectively. Each POHEN signal is
updated on the falling edge of POHCK.
M2
P3
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
77
PMC [ PMC-SIERRA, INC ]
