ATmega16 datasheet(284/315 Pages) ATMEL

284 / 315 page

284

ATmega16(L)

2466E–AVR–10/02

Poll for Fuse write complete using programming instruction 6d, or wait for t

WLRH

(refer to Table 112 on page 267).

Load data low byte using programming instructions 6e. A “0” will program the

fuse, a “1” will unprogram the fuse.

Write Fuse low byte using programming instruction 6f.

Poll for Fuse write complete using programming instruction 6g, or wait for t

WLRH

(refer to Table 112 on page 267).

Programming the Lock Bits

Enter JTAG instruction PROG_COMMANDS.

Enable Lock bit write using programming instruction 7a.

Load data using programming instructions 7b. A bit value of “0” will program the

corresponding Lock bit, a “1” will leave the Lock bit unchanged.

Write Lock bits using programming instruction 7c.

Poll for Lock bit write complete using programming instruction 7d, or wait for

tWLRH (refer to Table 112 on page 267).

Reading the Fuses and Lock

Bits

Enter JTAG instruction PROG_COMMANDS.

Enable Fuse/Lock bit read using programming instruction 8a.

To read all Fuses and Lock bits, use programming instruction 8e.

To only read Fuse high byte, use programming instruction 8b.

To only read Fuse low byte, use programming instruction 8c.

To only read Lock bits, use programming instruction 8d.

Reading the Signature Bytes

Enter JTAG instruction PROG_COMMANDS.

Enable Signature byte read using programming instruction 9a.

Load address $00 using programming instruction 9b.

Read first signature byte using programming instruction 9c.

Repeat steps 3 and 4 with address $01 and address $02 to read the second and

third signature bytes, respectively.

Reading the Calibration Byte

Enter JTAG instruction PROG_COMMANDS.

Enable Calibration byte read using programming instruction 10a.

Load address $00 using programming instruction 10b.

Read the calibration byte using programming instruction 10c.

ATMEGA16 Datasheet(PDF) 284 Page - ATMEL Corporation