9 RAM Read Data register, RRD

Reading this register allows data to be read from the trace memory. When the memory width is greater than the APB width (32-bit), multiple reads to the same location must be performed to get the complete memory dataword. The RRP register is incremented only after the last of the required number of read accesses to fetch one memory dataword completes. When the trace memory is empty, this register returns 0xFFFFFFFF. This value is chosen because it cannot be generated as part of trace data when the formatter is enabled.

The RRD register characteristics are:

Attributes
Offset

0x0010

Type

Read-only

Reset

0x--------

Width

32

The following figure shows the bit assignments.

Figure 9-365 RRD register bit assignments
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The following table shows the bit assignments.

Table 9-378 RRD register bit assignments

Bits Reset value Name Function
[31:0] UNKNOWN RRD

Returns the data read from trace memory.

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