9.5.1 Control A
| Name: | CTRLA |
| Offset: | 0x00 |
| Reset: | 0x00 |
| Property: | Configuration Change Protection |
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
| CMD[2:0] | |||||||||
| Access | R/W | R/W | R/W | ||||||
| Reset | 0 | 0 | 0 | ||||||
Bits 2:0 – CMD[2:0] Command
| Value | Name | Description |
|---|---|---|
| 0x0 | - | No command |
| 0x1 | WP | Write page buffer to memory (NVMCTRL.ADDR selects which memory) |
| 0x2 | ER | Erase page (NVMCTRL.ADDR selects which memory) |
| 0x3 | ERWP | Erase and write page (NVMCTRL.ADDR selects which memory) |
| 0x4 | PBC | Page buffer clear |
| 0x5 | CHER | Chip erase: erase Flash and EEPROM (unless EESAVE in FUSE.SYSCFG is '1') |
| 0x6 | EEER | EEPROM Erase |
| 0x7 | WFU | Write fuse (only accessible through UPDI) |