ATMEGA32A_1 Datasheet, PDF (290/352 Pages) ATMEL Corporation – 8-bit Microcontroller with 32K Bytes In-System Programmable Flash

Figure 26-15. 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
7c. Write Lock Bits
0110011_00000000
xxxxxxx_xxxxxxxx
(1)
0110001_00000000
xxxxxxx_xxxxxxxx
0110011_00000000
xxxxxxx_xxxxxxxx
0110011_00000000
xxxxxxx_xxxxxxxx
7d. Poll for Lock Bit Write complete
0110011_00000000
xxxxxox_xxxxxxxx
(2)
8a. Enter Fuse/Lock Bit Read
8b. Read Fuse High Byte⁽⁶⁾
8c. Read Fuse Low Byte⁽⁷⁾
8d. Read Lock Bits⁽⁸⁾
0100011_00000100
0111110_00000000
0111111_00000000
0110010_00000000
0110011_00000000
0110110_00000000
0110111_00000000
xxxxxxx_xxxxxxxx
xxxxxxx_xxxxxxxx
xxxxxxx_oooooooo
xxxxxxx_xxxxxxxx
xxxxxxx_oooooooo
xxxxxxx_xxxxxxxx
(5)
xxxxxxx_xxoooooo
8e. Read Fuses and Lock Bits
0111110_00000000
0110010_00000000
0110110_00000000
0110111_00000000
xxxxxxx_xxxxxxxx
xxxxxxx_oooooooo
xxxxxxx_oooooooo
xxxxxxx_oooooooo
(5)
fuse high byte
fuse low byte
lock bits
9a. Enter Signature Byte Read
0100011_00001000
xxxxxxx_xxxxxxxx
9b. Load Address Byte
0000011_bbbbbbbb
xxxxxxx_xxxxxxxx
9c. Read Signature Byte
0110010_00000000
0110011_00000000
xxxxxxx_xxxxxxxx
xxxxxxx_oooooooo
10a. Enter Calibration Byte Read
0100011_00001000
xxxxxxx_xxxxxxxx
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
xxxxxxx_xxxxxxxx
0110011_00000000
xxxxxxx_xxxxxxxx
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 267
7. The bit mapping for fuses low byte is listed in Table 26-4 on page 268
8. The bit mapping for Lock bits byte is listed in Table 26-1 on page 266
9. Address bits exceeding PCMSB and EEAMSB (Table 26-5 and Table 26-6) are don’t care
290 ATmega32A
8155B–AVR–07/09