ATtiny261-ESSZ datasheet(186/227 Pages) ATMEL

186 / 227 page

186

7753C–AVR–07/09

ATtiny261/ATtiny461/ATtiny861

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.

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 22-8 on page

186.

Figure 22-8. Serial Programming Instruction example

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 22-15. Serial Programming Instruction Set (Continued)

Instruction/Operation

Instruction Format

Byte 1

Byte 2

Byte 3

Byte4

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

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