PM4332 datasheet(39/446 Pages) PMC

39 / 446 page

PRELIMINARY

PM4332 TE-32

DATA SHEET

PMC-2011402

ISSUE 1

HIGH DENSITY 32 CHANNEL T1/E1/J1 FRAMER

PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR THE INTERNAL USE OF ITS CUSTOMERS

Pin Name

Type

No.

Function

LDC1FP

Input

AB6 Line Drop C1 Frame Pulse (LDC1FP). The

LDC1FP provides frame synchronization for

devices connected via an SBI interface. LDC1FP

is asserted, for one LREFCLK cycle, for the first

C1 byte of the SBI multiframe on the

LDDATA[7:0] bus. This signal occurs every

500

µS (i.e. every 9720 LREFCLK cycles).

LDC1FP is sampled on the rising edge of

LREFCLK.

LDV5

Input

Line Drop Bus V5 Byte (LDV5). The incoming

tributary V5 byte signal marks the various

tributary V5 bytes. LDV5 marks each tributary V5

byte on the LDDATA[7:0] bus when high.

LDV5 is sampled on the rising edge of

LREFCLK.

LDPL

Input

Line Drop Bus Tributary Payload Active

(LDPL). The tributary payload active signal

marks the bytes carrying the tributary payload

which have been identified by an external

payload processor. When this signal is available,

the internal pointer processor can be bypassed.

LDPL is only respected for asynchronously

mapped tributaries.

LDPL is high during each tributary payload byte

on the LDDATA[7:0] bus.

LDPL is sampled on the rising edge of

LREFCLK.

PM4332 Datasheet(PDF) 39 Page - PMC-Sierra, Inc

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