ATmega16A datasheet(287/352 Pages) ATMEL

287 / 352 page

287

8154B–AVR–07/09

ATmega16A

Notes:

1. This command sequence is not required if the seven MSB are correctly set by the previous command sequence (which is

normally the case).

2. Repeat until o = “1”.

3. Set bits to “0” to program the corresponding fuse, “1” to unprogram the fuse.

4. Set bits to “0” to program the corresponding lock bit, “1” to leave the lock bit unchanged.

5. “0” = programmed, “1” = unprogrammed.

6. The bit mapping for Fuses High byte is listed in Table 26-3 on page 265

7. The bit mapping for Fuses Low byte is listed in Table 26-4 on page 266

8. The bit mapping for Lock bits byte is listed in Table 26-1 on page 264

9. Address bits exceeding PCMSB and EEAMSB (Table 26-5 and Table 26-6) are don’t care

10b. Load Address Byte

0000011_bbbbbbbb

xxxxxxx_xxxxxxxx

10c. Read Calibration Byte

0110110_00000000

0110111_00000000

xxxxxxx_xxxxxxxx

xxxxxxx_oooooooo

11a. Load No Operation Command

0100011_00000000

0110011_00000000

xxxxxxx_xxxxxxxx

Table 26-14. JTAG Programming Instruction Set (Continued)

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

Instruction

TDI sequence

TDO sequence

Notes

ATmega16A Datasheet(PDF) 287 Page - ATMEL Corporation