ATmega64A Atmel Corporation, ATmega64A Datasheet - Page 159

• Manufacturer Part Number: ATmega64A
• Manufacturer: Atmel Corporation

Specifications of ATmega64A

• Flash (kbytes): 64 Kbytes
• Pin Count: 64
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 16
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 53
• Ext Interrupts: 8
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Twi (i2c): 1
• Uart: 2
• 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): 4
• Eeprom (bytes): 2048
• 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: 4
• Output Compare Channels: 8
• Input Capture Channels: 2
• Pwm Channels: 7
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

8160C–AVR–07/09
Table 17-4
mode.
Table 17-4.
Note:
Table 17-5
rect PWM mode.
Table 17-5.
Note:
• Bit 2:0 – CS22:0: Clock Select
The three Clock Select bits select the clock source to be used by the Timer/Counter.
Table 17-6.
If external pin modes are used for the Timer/Counter2, transitions on the T2 pin will clock the
counter even if the pin is configured as an output. This feature allows software control of the
counting.
COM21
CS22
COM21
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
1. A special case occurs when OCR2 equals TOP and COM21 is set. In this case, the Compare
1. A special case occurs when OCR2 equals TOP and COM21 is set. In this case, the Compare
Match is ignored, but the set or clear is done at BOTTOM. See
for more details.
Match is ignored, but the set or clear is done at TOP. See
154
shows the COM21:0 bit functionality when the WGM21:0 bits are set to phase cor-
shows the COM21:0 bit functionality when the WGM21:0 bits are set to fast PWM
COM20
CS21
0
0
1
1
0
0
1
1
Compare Output Mode, Fast PWM Mode
Compare Output Mode, Phase Correct PWM Mode
Clock Select Bit Description
0
1
0
1
for more details.
COM20
Description
Normal port operation, OC2 disconnected.
Reserved
Clear OC2 on Compare Match when up-counting. Set OC2 on Compare Match
when downcounting.
Set OC2 on Compare Match when up-counting. Clear OC2 on Compare Match
when downcounting.
CS20
0
1
0
1
0
1
0
1
0
1
0
1
Description
No clock source (Timer/counter stopped).
clk
clk
clk
clk
clk
External clock source on T2 pin. Clock on falling edge.
External clock source on T2 pin. Clock on rising edge.
Description
Normal port operation, OC2 disconnected.
Reserved
Clear OC2 on Compare Match, set OC2 at BOTTOM,
(non-inverting mode).
Set OC2 on Compare Match, clear OC2 at BOTTOM,
(inverting mode).
I/O
I/O
I/O
I/O
I/O
/(No prescaling)
/8 (From prescaler)
/64 (From prescaler)
/256 (From prescaler)
/1024 (From prescaler)
(1)
“Phase Correct PWM Mode” on page
(1)
“Fast PWM Mode” on page 152
ATmega64A
159