The Performance Counter Data Write Register (PCDWR) writes initial values to the counters. To write all configured counters, the register should be written repeatedly. This register is a write-only register. Issuing a read request has no effect, and undefined data is read.
Because a counter can have more than 32 bits, depending on the configuration, the register might need to be written repeatedly to update all information for a particular counter, as described in Table 2.
Figure 1. Performance Counter Data Write Register
| Bits | Name | Description | Reset Value |
|---|---|---|---|
| 31:0 | Item | Counter value item to write into a counter | 0 |