PM7346 datasheet(199/419 Pages) PMC

199 / 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 178

Bit

Type

Function

Default

Bit 7

Unused

Bit 6

R/W

PYLD&JUST

Bit 5

R/W

CPERR

Bit 4

R/W

DFERR

Bit 3

R/W

DLCV

Bit 2

R/W

Reserved

Bit 1

R/W

TAIS

Bit 0

R/W

NATUSE

NATUSE:

The NATUSE bit determines the default value of the National Use bit inserted

into the G.751 E3 frame overhead. The value of the NATUSE bit is logically

ORed with the bit collected once per frame from the internal HDLC

transmitter (if TNETOP is set to logic 1). When TNETOP is logic 0, the

NATUSE bit controls the value of the National Use bit. When NATUSE is logic

1, the National Use bit (bit 12 in G.751) is forced to logic 1 regardless of the

bit input from the internal HDLC transmitter or the setting of TNETOP. When

NATUSE is logic 0, the National Use bit is set to the value sampled from the

internal HDLC transmitter if TNETOP is logic 0. Otherwise, the National Use

bit will be set to logic 0. If the E3 TRAN is configured for G.832 mode, this bit

is ignored.

TAIS:

The TAIS bit enables AIS signal transmission. When TAIS is logic 1, the all 1’s

AIS signal is transmitted. When TAIS is logic 0, the normal data is

transmitted.

Reserved:

The Reserved bit must be programmed to logic 0 for proper operation.

DLCV:

The DLCV bit selects whether a line code violation is generated for diagnostic

purposes. When DLCV changes from logic 0 to logic 1, single LCV is

generated; in HDB3, the LCV is generated by causing a bipolar violation

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