PM7347 datasheet(93/341 Pages) PMC

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S/UNI®-JET Data Sheet

Released

Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use

Document ID: PMC-1990267, Issue 3

RBLEN

The RBLEN bit enables: the receive RED alarm (persistent OOF) 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 one, 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 zero when RBLEN is logic one. When RBLEN is logic zero, assertion of the

RED indication does not cause transmission of a FERF.

When RBLEN is logic one, 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 zero, BIP8 errors detected by the E3 framer do not cause

FEBEs to be generated by the E3_TRAN.

When RBLEN is logic one, 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 zero, 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 RAI 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 one, 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 zero, assertion of the AIS indication does not cause

transmission of a FERF/RAI.

Note: 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 one. If the XBOC FEAC code is to be

transmitted in J2 mode, LOSEN, OOFEN, AISEN, and LCDEN should all be set to logic

zero.

PM7347 データシート(PDF) 93 Page - PMC-Sierra, Inc