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A.2.1. ATB master interface signals

Trace output stream. This interface is present only in ETF configurations. Table A.2 shows the ATB master interface signals.

Table A.2. ATB master interface signals

Signal

Type

Description

ATVALIDM

Output

Valid signals in this cycle from the trace source

ATREADYM

Input

If there is valid data, that is, ATVALID HIGH, the data was accepted this cycle

ATIDM[6:0]

Output

Trace source ID

ATBYTESM[a]

Output

Number of valid bytes on ATDATA, minus one
ATDATAM[b]

Output

Trace data, LSB aligned

AFVALIDM

Input

Any data remaining in any buffers must be flushed

AFREADYM

Output

Data flush complete, AFVALID can be deasserted

[a] The width is dependent on the configured ATB width:

[1:0]

32-bit ATB.

[2:0]

64-bit ATB.

[3:0]

128-bit ATB.

[b] The width is dependent on the configured ATB width:

[31:0]

32-bit ATB

[63:0]

64-bit ATB

[127:0]

128-bit ATB


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