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
OD[16]
OD[17]
OD[18]
OD[19]
OD[20]
OD[21]
OD[22]
OD[23]
Output M22 The outgoing data bus (OD[23:16]) carries the
STM-1 #3 SONET/SDH frame data in byte serial
M21
N23
format.
In outgoing STM-1 (STS-3) interface mode
N21
N20
P23
P22
P21
(OHSMODEB set high), OD[23] is the most
significant bit, corresponding to bit 1 of each
serial word, the bit transmitted first. OD[16] is
the least significant bit, corresponding to bit 8 of
each serial word, the last bit transmitted.
OD[23:16] is set to all-zeros at transport
overhead bytes, except for the A1 and A2
framing bytes and the H1 and H2 pointer bytes.
Pointer offset is determined by the STP
Outgoing Pointer MSB and LSB registers. The
OD[23:16] bus is updated on the rising edge of
SCLK.
In outgoing STM-4 (STS-12) interface mode
(OHSMODEB set low), the OD[23:16] bus is
unused and all bus signals are invalid.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
53
PMC [ PMC-SIERRA, INC ]
