PM7346 datasheet(168/419 Pages) PMC

168 / 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 147

Bit

Type

Function

Default

Bit 7

R/W

AISPAT

Bit 6

R/W

FDET

Bit 5

R/W

MBDIS

Bit 4

R/W

M3O8

Bit 3

R/W

UNI

Bit 2

R/W

REFR

Bit 1

R/W

AISC

Bit 0

R/W

CBE

CBE:

The CBE bit enables the DS3 C-bit parity application. When a logic 1 is

written to CBE, C-bit parity mode is enabled. When a logic 0 is written to

CBE, the DS3 M23 format is selected. While the C-bit parity application is

enabled, C-bit parity error events, far end block errors are accumulated.

AISC:

The AISC bit controls the algorithm used to detect the alarm indication signal

(AIS). When a logic 1 is written to AISC, the algorithm checks that a framed

DS3 signal with all C-bits set to logic 0 is observed for a period of time before

declaring AIS. The payload contents are checked to the pattern selected by

the AISPAT bit. When a logic 0 is written to AISC, the AIS detection algorithm

is determined solely by the settings of AISPAT and AISONES register bits

(see bit mapping table in the Additional Configuration Register description).

REFR:

The REFR bit initiates a DS3 reframe. When a logic 1 is written to REFR, the

S/UNI-QJET is forced out-of-frame, and a new search for frame alignment is

initiated. Note that only a low to high transition of the REFR bit triggers

reframing; multiple write operations are required to ensure such a transition.

UNI:

The UNI bit configures the S/UNI-QJET to accept either dual-rail or single-rail

receive DS3 streams. When a logic 1 is written to UNI, the S/UNI-QJET

accepts a single-rail DS3 stream on RDATI. The S/UNI-QJET accumulates

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