Reading the fuses and lock bits, Reading the signature bytes, Reading the calibration byte – Rainbow Electronics ATmega162V User Manual
Page 262: Atmega162/v
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ATmega162/V
2513E–AVR–09/03
Reading the Fuses and Lock
Bits
1.
Enter JTAG instruction PROG_COMMANDS.
2.
Enable Fuse/Lock bit read using programming instruction 8a.
3.
To read all Fuses and Lock bits, use programming instruction 8f.
To only read Fuse Extended byte, use programming instruction 8b.
To only read Fuse High byte, use programming instruction 8c.
To only read Fuse Low byte, use programming instruction 8d.
To only read Lock bits, use programming instruction 8e.
Reading the Signature Bytes
1.
Enter JTAG instruction PROG_COMMANDS.
2.
Enable Signature byte read using programming instruction 9a.
3.
Load address 0x00 using programming instruction 9b.
4.
Read first signature byte using programming instruction 9c.
5.
Repeat steps 3 and 4 with address 0x01 and address 0x02 to read the second
and third signature bytes, respectively.
Reading the Calibration Byte
1.
Enter JTAG instruction PROG_COMMANDS.
2.
Enable Calibration byte read using programming instruction 10a.
3.
Load address 0x00 using programming instruction 10b.
4.
Read the calibration byte using programming instruction 10c.