Rainbow Electronics ATmega128L - Manual (Page 304)

304
ATmega128(L)
2467B–09/01
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 extended byte is listed in
Table 118 on page 280
7. The bit mapping for fuses high byte is listed in
Table 119 on page 281
8. The bit mapping for fuses low byte is listed in
Table 120 on page 281
9. The bit mapping for lock-bits byte is listed in
Table 116 on page 279
10. Address bits exceeding PCMSB and EEAMSB ( Table 124 and Table 125) are don’t care
8f. Read Fuses and Lock Bits 0111010_00000000
0111110_00000000
0110010_00000000
0110110_00000000
0110111_00000000
xxxxxxx_xxxxxxxx
xxxxxxx_oooooooo
xxxxxxx_oooooooo
xxxxxxx_oooooooo
xxxxxxx_oooooooo
(5)
fuse ext. byte
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
0110011_00000000
xxxxxxx_xxxxxxxx
xxxxxxx_xxxxxxxx
Table 132. JTAG Programming Instruction (Continued)
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