ATMEga64L ATMEL Corporation, ATMEga64L Datasheet - Page 319
ATMEga64L
Manufacturer Part Number
ATMEga64L
Description
8-bit AVR Microcontroller with 64K Bytes In-System Programmable Flash
Manufacturer
ATMEL Corporation
Datasheet
1.ATMEGA64L.pdf
(363 pages)
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Table 131. 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
Notes:
2490G–AVR–03/04
Instruction
8f. Read Fuses and Lock Bits
9a. Enter Signature Byte Read
9b. Load Address Byte
9c. Read Signature Byte
10a. Enter Calibration Byte Read
10b. Load Address Byte
10c. Read Calibration Byte
1. This command sequence is not required if the seven MSB are correctly set by the previous command sequence (which is
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 291.
7. The bit mapping for Fuses High byte is listed in Table 119 on page 292.
8. The bit mapping for Fuses Low byte is listed in Table 120 on page 292.
9. The bit mapping for Lock bits byte is listed in Table 116 on page 290.
10. Address bits exceeding PCMSB and EEAMSB (Table 124 and Table 125) are don’t care.
normally the case).
TDI sequence
0111010_00000000
0111110_00000000
0110010_00000000
0110110_00000000
0110111_00000000
0100011_00001000
0000011_bbbbbbbb
0110010_00000000
0110011_00000000
0100011_00001000
0000011_bbbbbbbb
0110110_00000000
0110111_00000000
TDO sequence
xxxxxxx_xxxxxxxx
xxxxxxx_oooooooo
xxxxxxx_oooooooo
xxxxxxx_oooooooo
xxxxxxx_oooooooo
xxxxxxx_xxxxxxxx
xxxxxxx_xxxxxxxx
xxxxxxx_oooooooo
xxxxxxx_xxxxxxxx
xxxxxxx_xxxxxxxx
xxxxxxx_oooooooo
xxxxxxx_xxxxxxxx
xxxxxxx_xxxxxxxx
ATmega64(L)
Notes
(5)
Fuse Ext. byte
Fuse High byte
Fuse Low byte
Lock bits
319
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