Datasheet
ATmega48PA/88PA/168PA [DATASHEET]
9223F–AVR–04/14
266
28.8.3 Serial Programming Instruction set
Table 28-17 on page 266 and Figure 28-8 on page 267 describes the Instruction set.
Table 28-17. Serial Programming Instruction Set (Hexadecimal values)
Instruction/Operation
Instruction Format
Byte 1 Byte 2 Byte 3 Byte4
Programming enable $AC $53 $00 $00
Chip erase (program memory/EEPROM) $AC $80 $00 $00
Poll RDY/BSY $F0 $00 $00 data byte out
Load Instructions
Load extended address byte
(1)
$4D $00 Extended adr $00
Load program memory page, high byte $48 $00 adr LSB high data byte in
Load program memory page, low byte $40 $00 adr LSB low data byte in
Load EEPROM memory page (page access) $C1 $00 0000 000aa data byte in
Read Instructions
Read program memory, high byte $28 adr MSB adr LSB high data byte out
Read program memory, low byte $20 adr MSB adr LSB low data byte out
Read EEPROM memory $A0 0000 00aa aaaa aaaa data byte out
Read lock bits $58 $00 $00 data byte out
Read signature byte $30 $00 0000 000aa data byte out
Read fuse bits $50 $00 $00 data byte out
Read fuse high bits $58 $08 $00 data byte out
Read extended fuse bits $50 $08 $00 data byte out
Read calibration byte $38 $00 $00 data byte out
Write Instructions
(6)
Write program memory page $4C adr MSB
(8)
adr LSB
(8)
$00
Write EEPROM memory $C0 0000 00aa aaaa aaaa data byte in
Write EEPROM memory page (page access) $C2 0000 00aa aaaa aa00 $00
Write lock bits $AC $E0 $00 data byte in
Write fuse bits $AC $A0 $00 data byte in
Write fuse high bits $AC $A8 $00 data byte in
Write extended fuse bits $AC $A4 $00 data byte in
Notes: 1. Not all instructions are applicable for all parts.
2. a = address.
3. Bits are programmed ‘0’, unprogrammed ‘1’.
4. To ensure future compatibility, unused fuses and lock bits should be unprogrammed (‘1’).
5. Refer to the corresponding section for fuse and lock bits, calibration and signature bytes and page size.
6. Instructions accessing program memory use a word address. This address may be random within the page range.
7. See http://www.atmel.com/avr for Application Notes regarding programming and programmers.
8. WORDS