ATmega324P datasheet(314/377 Pages) ATMEL

314 / 377 page

314

7674F–AVR–09/09

ATmega164P/324P/644P

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 25-11 on page

314.

Figure 25-11. Serial Programming Instruction example

Byte 1

Byte 2

Byte 3

Byte 4

Adr LSB

Bit 15 B

Serial Programming Instruction

Program Memory/

EEPROM Memory

Page 0

Page 1

Page 2

Page N-1

Page Buffer

Write Program Memory Page/

Write EEPROM Memory Page

Load Program Memory Page (High/Low Byte)/

Load EEPROM Memory Page (page access)

Byte 1

Byte 2

Byte 3

Byte 4

Bit 15 B

Adr MSB

Page Offset

Page Number

Adr M

Adrr L

LSB

ATmega324P 데이터시트(PDF) 314 Page - ATMEL Corporation

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