Datasheet

285

2466T–AVR–07/10

ATmega16(L)

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 105 on page 260

7. The bit mapping for Fuses Low byte is listed in Table 106 on page 261

8. The bit mapping for Lock bits byte is listed in Table 103 on page 259

9. Address bits exceeding PCMSB and EEAMSB (Table 107 and Table 108) 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 117. 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