PM5345 datasheet(83/196 Pages) PMC

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PM5345 S/UNI-155

DATA SHEET

PMC-930305

ISSUE 4

SATURN USER NETWORK INTERFACE

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

Bit

Type

Function

Default

Bit 7

R/W

PFERFE

Bit 6

PFERFV

Bit 5

R/W

TPFERF

Bit 4

Unused

Bit 3

Unused

Bit 2

R/W

LLE

Bit 1

R/W

DLE

Bit 0

R/W

LOOPT

This register controls the timing and high speed loopback features of the S/UNI.

LOOPT:

The LOOPT bit selects the source of timing for the transmit section of the

S/UNI. Loop time operation should only be activated while the bit serial

interface is selected. When LOOPT is a logic zero, the transmitter timing is

derived from inputs TXCI+ and TXCI- when the bit serial interface is selected

(TSER is tied high), or from the TCLK input when the byte serial interface is

selected (TSER is tied low).

When LOOPT is a logic one, and the bit serial interface is selected (TSER

and RSER are both tied high), the transmitter timing is derived from the

receiver, inputs RXCI+ and RXCI-. Loop timed operation is not supported

when the byte serial interface is selected (TSER and RSER are both tied

low). For byte serial operation, loop time operation should be performed in the

bit serial PMD.

DLE:

The DLE bit enables the S/UNI diagnostic loopback. Diagnostic loopback

may only be activated while the bit serial interface is selected. When DLE is a

logic one, the transmit STS-3c stream is connected to the receive stream.

The diagnostic loopback may be performed only when the bit serial interfaces

are selected.

PM5345 Datasheet(PDF) 83 Page - PMC-Sierra, Inc

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