PM7347 datasheet(222/341 Pages) PMC

222 / 341 page

S/UNI®-JET Data Sheet

Released

Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use

222

Document ID: PMC-1990267, Issue 3

Bit

Type

Function

Default

Bit 7

R/W

ZEROEN

Bit 6

R/W

RRAMACC

Bit 5

R/W

RTIUIE

Bit 4

R/W

RTIMIE

Bit 3

R/W

PER5

Bit 2

R/W

TNULL

Bit 1

R/W

NOSYNC

Bit 0

R/W

Reserved

The reserved bit should be set to logic zero for proper operation.NOSYNC

The NOSYNC bit disables synchronization to the Trail Trace message. When NOSYNC is set

high, synchronization is disabled and the bytes of the Trail Trace message are captured by the

TTB in a circular buffer. When NOSYNC is set low, the TTB synchronizes to the byte with

the most significant bit set high and places that byte in the first location in the capture buffer

page.

TNULL

The transmit null (TNULL) bit controls the insertion of all-zeros into the outgoing Trail Trace

message. The null insertion should be used when microprocessor accesses that change the

outgoing trail trace message are being performed. When TNULL is set high, an all-zeros byte

is inserted to the transmit stream. When this bit is set low, the contents of the transmit trace

buffer are sent.

PER5

The receive trace identifier persistency bit (PER5) controls the number of times that

persistency check is made in order to accept the received message. When this bit is set high,

five identical message required in order to accept the message. When this bit set low, three

unchanged consecutive messages are required.

RTIMIE

The receive trace identifier mismatch interrupt enable (RTIMIE) controls the activation of the

interrupt output when comparison between the accepted trace identifier message and the

expected trace identifier message changes state from match to mismatch and vice versa.

When RTIMIE is set high, changes in match state will activate the interrupt output. When

RTIMIE set low, trail trace message match state changes will not affect INTB.

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