PM5343STXC Datasheet, PDF (151/198 Pages) PMC-Sierra, Inc – SONET/SDH TRANSPORT OVERHEAD TRANSCEIVER TELECOM STANDARD PRODUCT

DATA SHEET
PMC-930303
Figure 6
A1
RXD+/-
RXC+/-
GRICLK/RICLK
ROUT[7:0]
PM5343 STXC
ISSUE 6
SONET/SDH TRANSPORT OVERHEAD TRANSCEIVER
- STS-3 Bit Serial Receive Frame Pattern and Data Alignment
A1
A1
A2
A2
A2
C1
C1
C1
A1 (F6H) A1 (F6H) A1 (F6H) A2 (28H)
The STS-3 Bit Serial Receive Frame Pulse and Data Alignment timing diagram
(Figure 6) illustrates the receive frame alignment for an STS-3 frame when the bit
serial interface is enabled (RSER=1). The STXC converts the bit serial STS-3
stream, RXD+/-, to byte serial format. Output GRICLK is a divide by eight of the
bit serial line clock, RSICLK, and must be externally connected to RICLK for
proper operation. The ROFP output is set high during the first SPE byte of the
first row of the SONET frame (immediately following the last Z0 byte), and may
be used by downstream circuitry for frame alignment. While the STXC is out-of-
frame, ROFP is updated based on the last frame alignment.
Figure 7 - STS-3 Byte Serial Receive Frame Pulse and Data Alignment
RICLK
RIFP (FPOS = 0)
RIFP (FPOS = 1)
RIN[7:0]
ROFP
ROUT[7:0]
A1 BYTE
(STS-1 #1 - STS-1 #3)
A2 BYTE
(STS-1 #1 - STS-1 #3)
C1 BYTE
(STS-1 #1 - STS-1 #3)
SPE
A1 BYTE
(STS-1 #1 - STS-1 #3)
A2 BYTE
(STS-1 #1 - STS-1 #3)
C1 BYTE
(STS-1 #1 - STS-1 #3)
SPE
The STS-3 Byte Serial Receive Frame Pulse and Data Alignment timing diagram
(Figure 7) illustrates the receive frame pulse input/output alignment for an
STS-3/STM-1 frame when the byte serial interface is enabled (RSER=0). The
FPOS bit in the Master Configuration Register controls the expected location of
the externally applied frame indication input, RIFP as indicated in the diagram.
The ROFP output is set high during the first SPE byte of the first row of the
SONET frame (immediately following the last Z0 byte), and may be used by
downstream circuitry for frame alignment. While the STXC is out-of-frame, ROFP
is updated based on the last frame alignment.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA INC., AND FOR ITS CUSTOMERS’ INTERNAL USE 137