PM5313 datasheet(61/646 Pages) PMC

61 / 646 page

PRODUCTION

PMC-Sierra, Inc.

PM5313 SPECTRA-622

DATASHEET

PMC-1981162

ISSUE 6

SONET/SDH PAYLOAD EXTRACTOR/ALIGNER FOR 622 MBIT/S

PROPRIETARY AND CONFIDENTIAL

Pin Name

Type

No.

Function

TPL

Output

AK7

The transmit payload output (TPL) is an active high

signal that indicates when the transmit data bus

TD[7:0] is carrying a payload byte. It is set high

during path overhead and payload bytes and low

during transport overhead bytes. TPL is set high

during the H3 byte to indicate a negative pointer

justification event and set low during the byte

following H3 to indicate a positive pointer

justification event.

TPL is updated on the rising edge of TCLK.

TC1J1V1/

Output

AJ8

The transmit composite timing signal (TC1J1V1)

indicates the frame, payload and tributary

multiframe boundaries on the transmit data bus

TD[7:0] when the TC1J1V1EN bit in the SPECTRA-

622 Transmit Telecom Bus Configuration register is

set high. TC1J1V1 pulses high with the transmit

payload active signal (TPL) set low to mark the first

STS-1 (STM-0/AU3) identification byte (C1).

TC1J1V1 pulses high with TPL set high to mark the

path trace byte(s) (J1). Optionally, the TC1J1V1

signal pulses high on the V1 byte(s) to indicate

tributary multiframe boundaries.

TC1J1V1 is updated on the rising edge of TCLK.

TFPO

Output

The transmit frame pulse output (TFPO) is an

active-high signal marking the frame alignment on

the serial stream TXD+/- or parallel transmit data

TD[7:0] when the TC1J1V1EN bit in the SPECTRA-

622 Transmit Telecom Bus Configuration register is

set low. In parallel mode, TFPO is set high for a

single TCLK period during the first SPE

(synchronous payload envelope) byte after the

J0/Z0 bytes on TD[7:0]. In serial mode, it will rising

15 bits (+/- 3 bits) before the first byte of the SPE

on TXD.

TFPO is updated on the rising edge of TCLK.

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