PM5347 datasheet(140/302 Pages) PMC

140 / 302 page

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

124

Bit

Type

Function

Default

Bit 7

Unused

Bit 6

R/W

RRAMACC

Bit 5

R/W

Reserved

Bit 4

R/W

Reserved

Bit 3

R/W

PER5

Bit 2

R/W

TNULL

Bit 1

R/W

NOSYNC

Bit 0

R/W

LEN16

This register controls the receive and transmit portions of the SSTB.

LEN16:

The LEN16 bit selects the length of the section trace message to be 16 bytes

or 64 bytes. When LEN16 is a logic one, a 16 byte section trace message is

selected. When LEN16 is a logic zero, a 64 byte section trace message is

selected.

NOSYNC:

The NOSYNC bit disables the writing of the section trace message into the

trace buffer to be synchronized to the content of the message. When LEN16

is a logic one and NOSYNC is a logic zero, the receive section trace message

byte with its most significant bit set will be written to the first location in the

buffer. When LEN16 and NOSYNC are logic zero, the byte after the carriage

return/linefeed (CR/LF) sequence will be written to the first location in the

buffer. When NOSYNC is a logic one, synchronization is disabled, and the

section trace message buffer behaves as a circular buffer.

TNULL:

The TNULL bit controls the insertion of an all-zero section trace identifier

message in the transmit stream. When TNULL is a logic one, the contents of

the transmit buffer is ignored and all-zeros bytes are inserted. When TNULL

is a logic zero, the contents of the transmit section trace buffer is sent to

TSOP for insertion into the J0 transmit section overhead byte. TNULL should

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