PM7346 datasheet(123/419 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 102

logic 0, assertion of the OOF indication does not cause transmission of a

FERF/RAI.

Note that for the RAI to be automatically transmitted when in J2 format, the

FEAC[5:0] bits in the XBOC Code register must all be set to logic 1. If the

XBOC FEAC code is to be transmitted in J2 mode, LOSEN, OOFEN, AISEN,

and LCDEN should all be set to logic 0.

RBLEN:

The RBLEN bit enables the receive RED alarm (persistent out of frame)

indication to automatically generate a FERF indication in the DS3 transmit

stream, or a BIP8 error detection in the E3 G.832 Framer to generate a FEBE

indication in the E3 G.832 transmit stream, or an LOF to generate a RLOF

indication (A-bit) in the J2 transmit stream. When the E3 G.751 framer is

selected, this bit has no effect. When RBLEN is logic 1 and TFRM[1:0] is 00

binary and RFRM[1:0] is 00 binary, assertion of the RED indication by the

framer causes a FERF to be transmitted by DS3_TRAN for the duration of the

RED assertion. Also, for DS3 frame format, the OOFEN bit is internally

forced to logic 0 when RBLEN is logic 1. When RBLEN is logic 0, assertion of

the RED indication does not cause transmission of a FERF. When RBLEN is

logic 1 and TFRM[1:0] is 01 binary and RFRM[1:0] is 01 binary, any BIP8

error indication by the E3 G.832 framer causes a FEBE to be generated by

the E3 G.832 TRAN. When RBLEN is logic 0, BIP8 errors detected by the E3

framer do not cause FEBEs to be generated by the E3_TRAN. When RBLEN

is logic 1 and TFRM[1:0] is 10 binary and RFRM[1:0] is 10 binary, any LOF

error indication by the J2 framer causes the RLOF bit (also known as the A

bit) to be set in the J2 transmit stream. When RBLEN is logic 0, LOF errors

detected by the J2 framer do not cause the RLOF bit to be set in the transmit

stream.

AISEN:

The AISEN bit enables the receive alarm indication signal to automatically

generate a FERF indication (RAI in G.751 or J2 mode) in the transmit stream.

This bit operates regardless of framer selected (DS3, E3, or J2). When

AISEN is logic 1, assertion of the AIS indication (physical AIS for J2) by the

framer causes a FERF/RAI to be transmitted by TRAN for the duration of the

AIS assertion. When AISEN is logic 0, assertion of the AIS indication does

not cause transmission of a FERF/RAI.

Note that for the RAI to be automatically transmitted when in J2 format, the

FEAC[5:0] bits in the XBOC Code register must all be set to logic 1. If the

XBOC FEAC code is to be transmitted in J2 mode, LOSEN, OOFEN, AISEN,

and LCDEN should all be set to logic 0.

PM7346 Datasheet(PDF) 123 Page - PMC-Sierra, Inc

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