ATmega8 Atmel Corporation, ATmega8 Datasheet - Page 23

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ATmega8

Manufacturer Part Number
ATmega8
Description
Manufacturer
Atmel Corporation
Datasheets

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

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Changes from Rev.
2486H-09/02 to
Rev. 2486I-12/02
Changes from Rev.
2486G-09/02 to
Rev. 2486H-09/02
Changes from Rev.
2486F-07/02 to
Rev. 2486G-09/02
Changes from Rev.
2486E-06/02 to
Rev. 2486F-07/02
Changes from Rev.
2486D-03/02 to
Rev. 2486E-06/02
Changes from Rev.
2486C-03/02 to
Rev. 2486D-03/02
2486ZS–AVR–02/11
1. Added errata for Rev D, E, and F on
1. Changed the Endurance on the Flash to 10,000 Write/Erase Cycles.
1. Updated
1. Changes in
2. Addition of OCS2 in
3. The following tables have been updated:
4. Changes in
5. Corrected Errors in Cross References.
1. Updated Some Preliminary Test Limits and Characterization Data
2. Changes in External Clock Frequency
3. Updated TWI Chapter
1. Updated Typical Start-up Times.
2. Added
Table 51, “CPOL and CPHA Functionality,” on page
on page
“ADC Conversion Time,” on page
and
Mapping to the Z-pointer,” on page
The following tables have been updated:
Table 15, “Reset Characteristics,” on page
acteristics,” on page
page
Added the description at the end of
Added period changing data in
More details regarding use of the TWI bit rate prescaler and a
caler,” on page
The following tables has been updated:
Table 5, “Start-up Times for the Crystal Oscillator Clock Selection,” on page
“Start-up Times for the Low-frequency Crystal Oscillator Clock Selection,” on page
Table 8, “Start-up Times for the External RC Oscillator Clock Selection,” on page
Table 12, “Start-up Times for the External Clock Selection,” on page
Table 84, “Explanation of Different Variables used in Figure 103 on page 208 and the
241.
“ATmega8 Typical Characteristics” on page
152,
Table 103, “ADC Characteristics,” on page
“Digital Input Enable and Sleep Modes” on page
“Reading the Calibration Byte” on page
Table 72, “Analog Comparator Multiplexed Input
167.
42, DC Characteristics on
“MOSI/OC2 – Port B, Bit 3” on page
Table 99, “External Clock Drive,” on page
193,
214.
“External Clock” on page
page
Table 75, “Input Channel Selections,” on page
38,
289.
Table 16, “Internal Voltage Reference Char-
page
235,
127,
242.
241.
227.
Table , “ADC Characteristics,” on
Table 59, “UCPOL Bit Settings,”
59.
32.
Table 65, “TWI Bit Rate Pres-
(1)
55.
,” on page
ATmega8(L)
32.
237.
188,
28,
Table 73,
Table 6,
29, and
199,
28,
23

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