PM5366 datasheet(50/267 Pages) PMC

50 / 267 page

PRELIMINARY

PM5366 TEMAP-84

DATASHEET

PMC-2010672

ISSUE 1

HIGH DENSITY 84/63 CHANNEL VT/TU MAPPER

AND M13 MULTIPLEXER

PROPRIETARY AND CONFIDENTIAL

Pin Name

Type

No.

Function

L77

Input

AA4 The Line 77.76 MHz select input determines the

expected frequency of LREFCLK. If L77 is low,

LREFCLK is expected to be 19.44 MHz. If L77 is high,

LREFCLK is expected to be 77.76 MHz and data is

driven and sampled every fourth cycle.

L77 must be held static.

LAC1

Input

W10 Line Add C1 Frame Pulse (LAC1). The Add bus

timing signal identifies the frame and multiframe

boundaries on the Add Data bus LADATA[7:0].

LAC1 is set high to mark the first C1 byte of the first

transport envelope frame of the 4 frame multiframe on

the LADATA[7:0] bus. LAC1 need not be presented on

every occurrence of the multiframe .

LAC1 is sampled on the rising edge of LREFCLK.

LAC1J1V1

Output AA11 Line Add Bus Composite Timing Signal

(LAC1J1V1). The Add bus composite timing signal

identifies the frame, payload and tributary multiframe

boundaries on the Line Add Data bus LADATA[7:0].

LAC1J1V1 pulses high with the Line Add Payload

Active signal LAPL set low to mark the first STS-1

(STM-0/AU3) identification byte or equivalently the

STM identification byte C1. Optionally the LAC1J1V1

signal pulses high with LAPL set high to mark the path

trace byte J1. Optionally the LAC1J1V1 signal pulses

high on the V1 byte to indicate tributary multiframe

boundaries.

In a system with multiple TEMAP-84s sharing the

same Line Add bus only one device should have

LAC1J1V1 connected. All devices must be configured

via the TXPTR[9:0] bits in the SONET/SDH Transmit

Pointer Configuration and TTMP Telecom Interface

Configuration registers for the same J1 location.

When L77 high, LAC1J1V1 is only valid (i.e. identifies

the first C1, J1 and V1 of the concatenated STM-4

data stream) if the LSTM[1:0] bits in the Master Bus

Configuration register (0x0006) are set to “00”.

LAC1J1V1 is updated on the rising edge of LREFCLK.

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