ATmega8A Atmel Corporation, ATmega8A Datasheet - Page 117

• Manufacturer Part Number: ATmega8A
• Manufacturer: Atmel Corporation

Specifications of ATmega8A

• 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
• Pwm Channels: 3
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

8159D–AVR–02/11
Figure 17-8. Timer/Counter Timing Diagram, no Prescaling
Figure 17-9
Figure 17-9. Timer/Counter Timing Diagram, with Prescaler (f
Figure 17-10
Figure 17-10. Timer/Counter Timing Diagram, Setting of OCF2, with Prescaler (f
TCNTn
(clk
TCNTn
TCNTn
(clk
(clk
TOVn
OCRn
OCFn
TOVn
clk
clk
clk
clk
clk
clk
I/O
I/O
I/O
I/O
Tn
I/O
I/O
Tn
Tn
/1)
/8)
/8)
shows the same timing data, but with the prescaler enabled.
shows the setting of OCF2 in all modes except CTC mode.
MAX - 1
OCRn - 1
MAX - 1
MAX
MAX
OCRn
OCRn Value
BOTTOM
BOTTOM
OCRn + 1
clk_I/O
/8)
ATmega8A
BOTTOM + 1
BOTTOM + 1
OCRn + 2
clk_I/O
/8)
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