ATmega8 Atmel Corporation, ATmega8 Datasheet - Page 233

• Manufacturer Part Number: ATmega8
• Manufacturer: Atmel Corporation

Specifications of ATmega8

• Flash (kbytes): 8 Kbytes
• Pin Count: 32
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 12
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 23
• Ext Interrupts: 2
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Twi (i2c): 1
• Uart: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 1
• Eeprom (bytes): 512
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 2.7 to 5.5
• Operating Voltage (vcc): 2.7 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 3
• Output Compare Channels: 3
• Input Capture Channels: 1
• Pwm Channels: 3
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

Table 98. Serial Programming Instruction Set
Note:
2486Z–AVR–02/11
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
Byte 4
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 215
Write Lock Bits. Set bits = “0” to
program Lock Bits. See
on page 215
Read Signature Byte o at address
b
Set bits = “0” to program, “1” to
unprogram. See
page 217
Set bits = “0” to program, “1” to
unprogram. See
page 216
Read Fuse Bits. “0” = programmed,
“1” = unprogrammed. See
88 on page 217
Read Fuse high bits. “0” = pro-
grammed, “1” = unprogrammed.
See
details
Read Calibration Byte
Table 87 on page 216
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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