PM7346 datasheet(63/419 Pages) PMC

63 / 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 42

Pin Name

Type

Pin No.

Function

TPRTY

Input

G19

Transmit bus parity (TPRTY). The transmit

parity (TPRTY) signal indicates the parity

of the TDAT[15:0] or TDAT[7:0] bus. If

configured for the 8-bit bus (via the ATM8

input pin), then parity is calculated over

TDAT[7:0]. If configured for the 16-bit bus,

then parity is calculated over TDAT[15:0].

A parity error is indicated by a status bit

and a maskable interrupt. Cells with parity

errors are inserted in the transmit stream,

so the TPRTY input may be unused.

Odd or even parity selection is made using

the TPTYP register bit. TPRTY is sampled

on the rising edge of TFCLK and is

considered valid only when TENB is

simultaneously asserted and the

S/UNI-QJET has been selected via the

TADR[4:0] and PHY_ADR[2:0] inputs.

TSOC

Input

G20

Transmit Start of Cell (TSOC). The

transmit start of cell (TSOC) signal marks

the start of cell on the TDAT bus. When

TSOC is high, the first word of the cell

structure is present on the TDAT bus. It is

not necessary for TSOC to be present for

each cell. An interrupt may be generated

if TSOC is high during any word other than

the first word of the cell structure. TSOC is

sampled on the rising edge of TFCLK and

is considered valid only when TENB is

simultaneously asserted and the

S/UNI-QJET has been selected via the

TADR[4:2] and PHY_ADR[2:0] inputs.

PM7346 Datasheet(PDF) 63 Page - PMC-Sierra, Inc

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