PM7344 datasheet(94/293 Pages) PMC

94 / 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

Registers 004H, 104H, 204H and 304H: Transmit Interface Configuration

Bit

Type

Function

Default

Bit 7

R/W

TOCTA

Bit 6

R/W

TOHINV

Bit 5

R/W

TDNINV

Bit 4

R/W

TDPINV

Bit 3

R/W

TUNI

Bit 2

R/W

TFALL

Bit 1

R/W

TRISE

Bit 0

R/W

TRZ

These registers enable the Transmit Interface to generate the required digital

output waveform format.

TOCTA:

The TOCTA bit configures the interface to octet-align the transmit cell stream

to the transmission overhead. This bit has no effect when T1, E1 or J2

formats are selected, since octet alignment is specified for these formats.

When the arbitrary format is selected and TOCTA is set to logic 1, the ATM

cell octets are aligned to the arbitrary transmission format overhead

boundaries (as delineated by the TOHI input). The number of TCLKI periods

between transmission format overhead bit positions must be divisible by 8.

When TOCTA is set to logic 0, no octet alignment is performed, and there is

no restriction on the number of TCLKI periods between transmission format

overhead bit positions.

TOHINV:

The TOHINV bit enables the Transmit Interface to internally invert the signal

on the TFPI/TOHI multifunction pin, changing its active polarity. When

TOHINV is set to logic 1, the TFPI/TOHI input is active low. When TOHINV is

set to logic 0, the TFPI/TOHI input is active high.

TDPINV,TDNINV:

The TDPINV and TDNINV bits enable the Transmit Interface to logically invert

the signals output on the TDP/TDD[x] and TDN/TOHO[x] multifunction pins,

respectively. When TDPINV is set to logic 1, the TDP/TDD[x] output is

inverted. When TDPINV is set to logic 0, the TDP/TDD[x] output is not

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