PM5347 datasheet(40/302 Pages) PMC

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PM5347 S/UNI-PLUS

DATA SHEET

PMC-941033

ISSUE 6

SATURN USER NETWORK INTERFACE PLUS

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

Pin Name

Type

No.

Function

RSOC

Tristate

189

The receive start of cell (RSOC) signal marks the

start of cell on the RDAT[15:0] bus. When RSOC

is high, the first word of the cell structure is

present on the RDAT[15:0] bus. RSOC is updated

on the rising edge of RFCLK.

When the S/UNI-PLUS is configured for tristate

operation using the TSEN input, tristating of

output RSOC is control by input RRDENB.

RCA

Output

188

The receive cell available (RCA) signal indicates

when a cell is available in the receive FIFO. When

asserted, RCA indicates that the receive FIFO

has at least one cell available to be read. When

RCA is deasserted, the receive FIFO contains

only four words or is empty (as selected in the

RACP Interrupt Enable/Control register). RCA

default state can be selected in the S/UNI-PLUS

Master Control register. RCA is updated on the

rising edge of RFCLK. The active polarity of this

signal is programmable and defaults to active

high.

BUS8

Input

The bus width select (BUS8) input selects the

transmit and receive SCI-PHY interface types.

When BUS8 is tied high, the 8-bit wide SCI-PHY

interface is enabled. When BUS8 is tied low, the

16-bit wide SCI-PHY interface is selected.

TSEN

Input

The tristate enable (TSEN) signal allows tristate

control over outputs RDAT[15:0], RXPRTY[1:0]

and RSOC. When TSEN is high, the active low

receive read enable input, RRBENB controls

when outputs RDAT[15:0], RXPRTY[1:0] and

RSOC are driven. When TSEN is low, outputs

RDAT[15:0], RXPRTY[1:0] and RSOC are always

driven.

PM5347 Datasheet(PDF) 40 Page - PMC-Sierra, Inc

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