ATMEGA8L ATMEL [ATMEL Corporation], ATMEGA8L Datasheet - Page 235

• Manufacturer Part Number: ATMEGA8L
• Description: 8-bit AVR with 8K Bytes In-System Programmable Flash
• Manufacturer: ATMEL [ATMEL Corporation]

Table 98. Serial Programming Instruction Set
Note:
2486M–AVR–12/03
Instruction
Programming Enable
Chip Erase
Read Program Memory
Load Program Memory
Page
Write Program Memory
Page
Read EEPROM Memory
Write EEPROM Memory
Read Lock Bits
Write Lock Bits
Read Signature Byte
Write Fuse Bits
Write Fuse High Bits
Read Fuse Bits
Read Fuse High Bits
Read Calibration Byte
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
1010 1100
1010 1100
0010 H000
0100 H000
0100 1100
1010 0000
1100 0000
0101 1000
1010 1100
0011 0000
1010 1100
1010 1100
0101 0000
0101 1000
0011 1000
Byte 1
0101 0011
100x xxxx
0000 aaaa
0000 xxxx
0000 aaaa
00xx xxxa
00xx xxxa
0000 0000
111x xxxx
00xx xxxx
1010 0000
1010 1000
0000 0000
0000 1000
00xx xxxx
Byte 2
Instruction Format
xxxx xxxx
xxxx xxxx
bbbb bbbb
xxxb bbbb
bbbx xxxx
bbbb bbbb
bbbb bbbb
xxxx xxxx
xxxx xxxx
xxxx xxbb
xxxx xxxx
xxxx xxxx
xxxx xxxx
xxxx xxxx
0000 00bb
Byte 3
xxxx xxxx
xxxx xxxx
oooo oooo
iiii iiii
xxxx xxxx
oooo oooo
iiii iiii
xxoo oooo
11ii iiii
oooo oooo
iiii iiii
iiii iiii
oooo oooo
oooo oooo
oooo oooo
Byte4
Operation
Enable Serial Programming after
RESET goes low.
Chip Erase EEPROM and Flash.
Read H (high or low) data o from
Program memory at word address
a:b.
Write H (high or low) data i to
Program memory page at word
address b. Data Low byte must be
loaded before Data High byte is
applied within the same address.
Write Program memory Page at
address a:b.
Read data o from EEPROM
memory at address a:b.
Write data i to EEPROM memory at
address a:b.
Read Lock Bits. “0” = programmed,
“1” = unprogrammed. See
85 on page 219
Write Lock Bits. Set bits = “0” to
program Lock Bits. See
on page 219
Read Signature Byte o at address
b.
Set bits = “0” to program, “1” to
unprogram. See
page 221
Set bits = “0” to program, “1” to
unprogram. See
page 220
Read Fuse Bits. “0” = programmed,
“1” = unprogrammed. See
88 on page 221
Read Fuse high bits. “0” = pro-
grammed, “1” = unprogrammed.
See
details.
Read Calibration Byte
Table 87 on page 220
ATmega8(L)
for details.
for details.
for details.
Table 88 on
Table 87 on
for details.
for details.
Table 85
Table
Table
for
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