PM7344 datasheet(186/293 Pages) PMC

186 / 293 page

PM7344 S/UNI-MPH

DATA SHEET

PMC-950449

ISSUE 6

MULTI-PHY USER NETWORK INTERFACE

PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE

170

Registers 059H, 159H, 259H and 359H: XPDE Interrupt Enable/Status

Bit

Type

Function

Default

Bit 7

R/W

STUFE

Bit 6

R/W

STUFF

Bit 5

STUFI

Bit 4

PDV

Bit 3

Z16DI

Bit 2

PDVI

Bit 1

R/W

Z16DE

Bit 0

R/W

PDVE

These registers are used to enforce a minimum pulse density in the transmit

stream when the T1 format is enabled.

STUFE:

The STUFE bit enables the occurrence of pulse stuffing to generate an

interrupt on INTB. When STUFE is set to logic 1, an interrupt is generated on

the occurrence of a bit stuff. When STUFE is a logic 0, bit stuffing

occurrences do not generate an interrupt on INTB.

STUFF:

The STUFF bit enables pulse stuffing to occur upon detection of a violation of

the pulse density rule. Bit stuffing is performed in such a way that the

resulting data stream no longer violates the pulse density rule. When STUFF

is set to logic 1, bit stuffing is enabled and the STUFI bit indicates the

occurrence of bit stuffs. When STUFF is a logic 0, bit stuffing is disabled and

the PDVI bit indicates an occurance of a pulse density violation. Also, when

STUFF is a logic 0, transmit data passes through XPDE unaltered.

STUFI:

The STUFI bit is valid when pulse stuffing is active. This bit indicates when a

bit stuff occurred to eliminate a pulse density violation. When pulse stuffing is

active, PDVI remains logic 0, indicating that the stuffing has removed the

density violation. The STUFI bit is reset to logic 0 once this register is read.

PM7344 Datasheet(PDF) 186 Page - PMC-Sierra, Inc

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