ATmega644P Atmel Corporation, ATmega644P Datasheet - Page 19

• Manufacturer Part Number: ATmega644P
• Manufacturer: Atmel Corporation

Specifications of ATmega644P

• 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: Yes
• 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

7. Packaging Information
7.1
8011OS–AVR–07/10
Notes:
44A
R
2325 Orchard Parkway
San Jose, CA 95131
1. This package conforms to JEDEC reference MS-026, Variation ACB.
2. Dimensions D1 and E1 do not include mold protrusion. Allowable
3. Lead coplanarity is 0.10 mm maximum.
C
protrusion is 0.25 mm per side. Dimensions D1 and E1 are maximum
plastic body size dimensions including mold mismatch.
e
PIN 1
0˚~7˚
L
PIN 1 IDENTIFIER
TITLE
44A, 44-lead, 10 x 10 mm Body Size, 1.0 mm Body Thickness,
0.8 mm Lead Pitch, Thin Profile Plastic Quad Flat Package (TQFP)
D1
D
B
E1
A1
E
A2
ATmega164P/324P/644P
SYMBOL
A
A
A1
A2
D
D1
E
E1
B
C
L
e
11.75
11.75
0.30
0.05
9.90
9.90
0.09
0.45
COMMON DIMENSIONS
0.95
MIN
(Unit of Measure = mm)
–
0.80 TYP
12.00
10.00
12.00
10.00
NOM
1.00
–
–
–
–
–
DRAWING NO.
12.25
10.10
12.25
10.10
MAX
1.20
0.15
1.05
0.45
0.20
0.75
44A
10/5/2001
Note 2
Note 2
NOTE
REV.
B
19