Microchip Technology megaAVR 0 Series Manual page 70

8.5.1 Control A
Name: CTRLA
Offset: 0x00
Reset: 0x00
Property: Configuration Change Protection
Bit 7
Access
Reset
Bits 2:0 – CMD[2:0] Command
Write this bit field to issue a command. The Configuration Change Protection key for self-programming
(SPM) has to be written within four instructions before this write.
Value Name
0x0 -
0x1 WP
0x2 ER
0x3 ERWP Erase and write page (NVMCTRL.ADDR selects which memory)
0x4 PBC
0x5 CHER Chip erase: erase Flash and EEPROM (unless EESAVE in FUSE.SYSCFG is '1')
0x6 EEER
0x7 WFU
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2018 Microchip Technology Inc.
6 5
Description
No command
Write page buffer to memory (NVMCTRL.ADDR selects which memory)
Erase page (NVMCTRL.ADDR selects which memory)
Page buffer clear
EEPROM Erase
Write fuse (only accessible through UPDI)
Nonvolatile Memory Controller (NVMCTRL)
4 3
Datasheet Preliminary
®
megaAVR 0-Series
2 1
CMD[2:0]
R/W R/W
0 0
DS40002015A-page 70
0
R/W
0