ATTINY22 データシートの表示（PDF） - Atmel Corporation

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ATTINY22

8-bit Microcontroller with 2K Bytes of In-System Programmable Flash

Atmel Corporation 

ATtiny22/22L

Table 17. Low-Voltage Serial Programming Instruction Set ATtiny22/L

Instruction Format

Instruction

Byte 1

Byte 2

Byte 3

Byte 4

Operation

Programming

Enable

1010 1100

0101 0011

xxxx xxxx

xxxx xxxx

Enable Serial Programming while

RESET is low.

Chip Erase

1010 1100

100x xxxx

xxxx xxxx

xxxx xxxx

Chip erase both Flash and

EEPROM memory arrays.

Read Program

Memory

0010 H000

0000 00aa

bbbb bbbb

oooo oooo

Read H (high or low) data o from

Program memory at word address

a:b.

Write Program

Memory

0100 H000

0000 00aa

bbbb bbbb

iiii iiii

Write H (high or low) data i to

Program memory at word address

a:b.

Read

EEPROM Memory

1010 0000

0000 0000

xbbb bbbb

oooo oooo

Read data o from EEPROM

memory at address b.

Write

EEPROM Memory

1100 0000

0000 0000

xbbb bbbb

iiii iiii

Write data i to EEPROM memory at

address b.

Read Lock and

Fuse Bits

0101 1000

xxxx xxxx

xxxx xxxx

12Sx xxxR

Read Lock and Fuse bits. ‘0’ =

programmed, ‘1’ = unprogrammed.

Write Lock Bits

1010 1100

1111 1211

xxxx xxxx

xxxx xxxx

Write Lock bits. Set bits 1,2 = ‘0’ to

program Lock bits.

Write RCEN Bit

1010 1100

1011 111R

xxxx xxxx

xxxx xxxx

Write RCEN Fuse. Set bit R = ‘0’ to

program, ‘1’ to unprogram.(1)

Read Signature

Bytes

0011 0000

xxxx xxxx

xxxx xxbb

oooo oooo

Read Signature byte o from

address b(2)

Note:

a = address high bits

b = address low bits

H = 0 - Low byte, 1- High byte

o = data out

i = data in

x = don’t care

1 = lock bit 1

2 = lock bit 2

R = RCEN Fuse

S = SPIEN Fuse

Notes: 1. When the state of the RCEN bit is changed, the device must be power cycled for the changes to have any effect.

2. The signature bytes are not readable in Lock mode 3, i.e. both Lock bits programmed.

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