PM7346 datasheet(56/419 Pages) PMC

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PM7346 S/UNI-QJET

DATASHEET

PMC-960835

ISSUE 6

SATURN QUAD USER NETWORK INTERFACE FOR J2, E3, T3

PMC-SIERRA, INC. PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA INC., AND ITS CUSTOMERS’ INTERNAL USE 35

Pin Name

Type

Pin No.

Function

ROHFP[4]

ROHFP[3]

ROHFP[2]

ROHFP[1]

Output

Receive DS3/E3/J2 Overhead Frame

Position (ROHFP[4:1]). ROHFP[4:1]

locates the individual overhead bits in the

received overhead data stream, ROH[4:1].

ROHFP[4:1] is high during the X1

overhead bit position in the ROH[4:1]

stream when processing a DS3 stream.

ROHFP[4:1] is high during the first bit of

the FA1 byte when processing a G.832 E3

stream. ROHFP[4:1] is high during the

RAI overhead bit position when processing

a G.751 E3 stream. ROHFP[4:1] is high

during the first bit in Timeslot 97 in the first

frame of the 4-frame multiframe when

processing a J2 stream. ROHFP[4:1] is

updated on the falling edge of

ROHCLK[4:1].

ROH[4]

ROH[3]

ROH[2]

ROH[1]

Output

Receive DS3/E3/J2 Overhead Data

(ROH[4:1]). ROH[4:1] contains the

overhead bits (C, F, X, P, and M) extracted

from the received DS3 stream; ROH[4:1]

contains the overhead bytes (FA1, FA2,

EM, TR, MA, NR, and GC) extracted from

the received G.832 E3 stream; ROH[4:1]

contains the overhead bits (RAI, National

Use, Stuff Indication, and Stuff

Opportunity) extracted from the received

G.751 E3 stream; ROH[4:1] contains the

overhead bits (Framing, X1-3, A, M, E1-5)

extracted from the received J2 stream.

ROH[4:1] is updated on the falling edge of

ROHCLK[4:1].

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