PM5352 datasheet(37/77 Pages) PMC

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PM5352 S/UNI STAR

DATA SHEET

PMC-1990421

ISSUE 2

SATURN USER NETWORK INTERFACE 155 (STAR)

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

Pin Name

Type

No.

Function

REOP

Output

(POS)

L23

POS-PHY Receive End Of Packet (REOP).

The REOP signal marks the end of packet on the

RDAT[15:0] bus. When the RXFP-50 is selected,

REOP is set high to mark the last word of the

packet presented on the RDAT[15:0] bus. During

this same cycle RMOD is used to indicate if the last

word has 1 or 2 bytes. It is legal to set RSOP high

at the same time REOP is high. This provides

support for one or two bytes packets, as indicated

by the value of RMOD. REOP is only used in POS

mode.

REOP is tristated when RENB is deasserted. REOP

is also tristated when either the null-PHY address

(0x7H) or an address not matching the address

space is latched from the RADR[2:0] inputs when

RENB is high.

REOP is updated on the rising edge of RFCLK.

RERR

Output

(POS)

L22

POS-PHY Receive Error (RERR).

The RERR signal indicates that the current packet

is aborted. RERR can only be asserted during the

last word transfer, at the same time REOP is

asserted. RERR is only used in POS mode.

RERR is tristated when RENB is deasserted. RERR

is also tristated when either the null-PHY address

(0x7H) or an address not matching the address

space is latched from the RADR[2:0] inputs when

RENB is high.

RERR is updated on the rising edge of RFCLK.

PM5352 Datasheet(PDF) 37 Page - PMC-Sierra, Inc

PM5352 Datasheet(HTML) 37 Page - PMC-Sierra, Inc

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