PM7347 datasheet(225/341 Pages) PMC

225 / 341 page

S/UNI®-JET Data Sheet

Released

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

225

Document ID: PMC-1990267, Issue 3

Bit

Type

Function

Default

Bit 7

R/W

RWB

Bit 6

R/W

A[6]

Bit 5

R/W

A[5]

Bit 4

R/W

A[4]

Bit 3

R/W

A[3]

Bit 2

R/W

A[2]

Bit 1

R/W

A[1]

Bit 0

R/W

A[0]

A[6:0]

The indirect read address bits (A[6:0]) indexes into the trail trace identifier buffers. When

RRAMACC is set high, decimal addresses 0 to 63 reference the receive capture page while

addresses 64 to 127 reference the receive expected page. The receive capture page contains

the identifier bytes extracted from the receive G.832 E3 stream. The receive expected page

contains the expected trace identifier message downloaded from the microprocessor. When

RRAMACC is set low, decimal addresses 0 to 63 reference the transmit message buffer

which contains the identifier message to be inserted in the TR bytes of the G.832 E3 transmit

stream. In this case A[6] is a don't care (for example, address 0 and address 64 are indexes to

the same location in the buffer). Note: Only the first 16 addresses need to be written with the

trail trace message to be transmitted.

RWB

The access control bit (RWB) selects between an indirect read or write access to the static

page of the trail trace message buffer. Writing to this indirect address register initiates an

external microprocessor access to the static page of the trail trace message buffer. When

RWB is set high, a read access is initiated. The data read is available upon completion of the

access in the TTB Indirect Data Register. When RWB is set low, a write access is initiated.

The data in the TTB Indirect Data Register will be written to the addressed location in the

static page.

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