The Performance Counter Control Register (PCCTRLR) is used to define the events that are counted by the configured performance counters. To define the events for all configured counters, the register should be written repeatedly for each of the counters. This register is a write-only register. Issuing a read request has no effect, and undefined data is read.
Every time the register is written, the selected counter is incremented. By using the Performance Counter Command Register, the selected counter can be reset to the first counter again. See the following figure and table.
Figure 1. Performance Counter Control Register
| Bits | Name | Description | Reset Value |
|---|---|---|---|
| 7:0 | Event | Performance counter event, according to Table 1. | 0 |