ATmega328P datasheet(311/448 Pages) ATMEL

311 / 448 page

311

8161D–AVR–10/09

ATmega48PA/88PA/168PA/328P

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 correspondig 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 htt://www.atmel.com/avr for Application Notes regarding programming and programmers.

If the LSB in RDY/BSY data byte out is ‘1’, a programming operation is still pending. Wait until

this bit returns ‘0’ before the next instruction is carried out.

Within the same page, the low data byte must be loaded prior to the high data byte.

After data is loaded to the page buffer, program the EEPROM page, see Figure 27-8 on page

312.

Write Instructions(6)

Write Program Memory Page

$4C

adr MSB

adr LSB

$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

Table 27-19. Serial Programming Instruction Set (Hexadecimal values) (Continued)

Instruction/Operation

Instruction Format

Byte 1

Byte 2

Byte 3

Byte4

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