PM5352 datasheet(28/77 Pages) PMC

28 / 77 page

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

TEOP

Input

(POS)

C18

POS-PHY Transmit End of Packet (TEOP).

The active high TEOP signal marks the end of a

packet on the TDAT[15:0] bus. When TEOP is

high, the last word of the packet is present on the

TDAT[15:0] data bus and TMOD indicates how

many bytes this last word is composed of. It is legal

to set TSOP high at the same time TEOP is high.

This provides support for one or two byte packets,

as indicated by the value of TMOD.

TEOP is considered valid only when TENB is

simultaneously asserted and the S/UNI-STAR is

selected via TADR[2:0].

TEOP is sampled on the rising edge of TFCLK.

TERR

Input

(POS)

D17

POS-PHY Transmit Error (TERR).

The transmit error indicator (TERR) is used to

indicate that the current packet must be aborted.

TERR should only be asserted during the last word

transfer of a packet. Packets marked with TERR will

be appended with the abort sequence (0x7D-0x7E)

when transmission.

TERR is considered valid only when TENB is

simultaneously asserted and the S/UNI-STAR is

selected via TADR[2:0].

TERR is sampled on the rising edge of TFCLK.

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