ATmega644A Atmel Corporation, ATmega644A Datasheet - Page 386
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ATmega644A
Manufacturer Part Number
ATmega644A
Description
Manufacturer
Atmel Corporation
Specifications of ATmega644A
Flash (kbytes)
64 Kbytes
Pin Count
44
Max. Operating Frequency
20 MHz
Cpu
8-bit AVR
# Of Touch Channels
16
Hardware Qtouch Acquisition
No
Max I/o Pins
32
Ext Interrupts
32
Usb Speed
No
Usb Interface
No
Spi
3
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
1.8 to 5.5
Operating Voltage (vcc)
1.8 to 5.5
Fpu
No
Mpu / Mmu
no / no
Timers
3
Output Compare Channels
6
Input Capture Channels
1
Pwm Channels
6
32khz Rtc
Yes
Calibrated Rc Oscillator
Yes
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ATmega644A-AU
Manufacturer:
Atmel
Quantity:
135
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8272C–AVR–06/11
Figure 29-78. ATmega164PA: Reset Pin Input Threshold vs. V
Figure 29-79. ATmega164PA: Reset Pin Input Hysteresis vs. V
2.5
1.5
0.5
0.7
0.6
0.5
0.4
0.3
0.2
0.1
2
1
0
0
1.5
1.5
ATmega164A/PA/324A/PA/644A/PA/1284/P
2
2
2.5
2.5
3
3
V
V
CC
CC
3.5
3.5
(V)
(V)
4
4
CC
4.5
CC
4.5
(V
IL
, I/O Pin Read as ‘0’).
5
5
5.5
5.5
-40 °C
-40 °C
85 °C
25 °C
25 °C
85 °C
386
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