PM7346 datasheet(110/419 Pages) PMC

110 / 419 page

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 89

Bit

Type

Function

Default

Bit 7

R/W

8KREFO

Bit 6

R/W

DS27_53

Bit 5

R/W

TOCTA

Bit 4

R/W

FRMRONLY

Bit 3

R/W

LOOPT

Bit 2

R/W

LLOOP

Bit 1

R/W

DLOOP

Bit 0

R/W

PLOOP

PLOOP:

The PLOOP bit controls the DS3, E3, or J2 payload loopback. When a logic 0

is written to PLOOP, DS3, E3, or J2 payload loopback is disabled. When a

logic 1 is written to PLOOP, the DS3, E3, or J2 overhead bits are regenerated

and inserted into the received DS3, E3, or J2 stream and the resulting stream

is transmitted. Setting the PLOOP bit disables the effect of the TICLK bit in

the S/UNI-QJET Transmit Configuration register, thereby forcing flow-through

timing. The TFRM[1:0] and RFRM[1:0] bits in the S/UNI-QJET Transmit

Configuration and Receive Configuration registers, respectively, must be set

to the same value for PLOOP to work properly.

DLOOP:

The DLOOP bit controls the diagnostic loopback. When a logic 0 is written to

DLOOP, diagnostic loopback is disabled. When a logic 1 is written to DLOOP,

the transmit data stream is looped in the receive direction. The TFRM[1:0]

and RFRM[1:0] bits in the S/UNI-QJET Transmit Configuration and Receive

Configuration registers, respectively, must be set to the same value for

DLOOP to work properly. The DLOOP should not be set to a logic 1 when

either the PLOOP, LLOOP, or LOOPT bit is a logic 1. When in DS3, E3, or J2

modes, the TUNI register bit in the S/UNI-QJET Transmit Configuration

FRMR registers.

PM7346 Datasheet(PDF) 110 Page - PMC-Sierra, Inc

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