ATtiny261A datasheet(183/292 Pages) ATMEL

Part #	ATtiny261A

Description	8-bit Microcontroller with 2/4/8K Bytes In-System Programmable Flash

PDF	292 Pages

Scroll/Zoom	100%

Manufacturer	ATMEL [ATMEL Corporation]

Direct Link	http://www.atmel.com

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183 / 292 page

183

8197A–AVR–10/09

ATtiny261A/461A/861A

Figure 18-8. Mapping Between BS1, BS2 and the Fuse and Lock Bits During Read

18.7.14

Reading the Signature Bytes

The algorithm for reading the Signature bytes is as follows (refer to “Programming the Flash” on

page 177 for details on Command and Address loading):

1. A: Load Command “0000 1000”.

2. B: Load Address Low Byte (0x00 - 0x02).

3. Set OE to “0”, and BS to “0”. The selected Signature byte can now be read at DATA.

4. Set OE to “1”.

18.7.15

Reading the Calibration Byte

The algorithm for reading the Calibration byte is as follows (refer to “Programming the Flash” on

page 177 for details on Command and Address loading):

1. A: Load Command “0000 1000”.

2. B: Load Address Low Byte, 0x00.

3. Set OE to “0”, and BS1 to “1”. The Calibration byte can now be read at DATA.

4. Set OE to “1”.

Lock Bits

BS2

Fuse High Byte

BS1

DATA

Fuse Low Byte

BS2

Extended Fuse Byte

ATtiny261A Datasheet(PDF) 183 Page - ATMEL Corporation