ATMEGA644-20PU Atmel, ATMEGA644-20PU Datasheet - Page 357
![IC AVR MCU FLASH 64K 40DIP](/photos/6/70/67049/453-40-dip_sml.jpg)
ATMEGA644-20PU
Manufacturer Part Number
ATMEGA644-20PU
Description
IC AVR MCU FLASH 64K 40DIP
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA644-20PU
Core Processor
AVR
Core Size
8-Bit
Speed
20MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
32
Program Memory Size
64KB (32K x 16)
Program Memory Type
FLASH
Eeprom Size
2K x 8
Ram Size
4K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
40-DIP (0.600", 15.24mm)
Processor Series
ATMEGA64x
Core
AVR8
Data Bus Width
8 bit
Data Ram Size
4 KB
Interface Type
2-Wire/SPI/USART
Maximum Clock Frequency
20 MHz
Number Of Programmable I/os
32
Number Of Timers
3
Operating Supply Voltage
2.7 V to 5.5 V
Maximum Operating Temperature
+ 85 C
Mounting Style
Through Hole
3rd Party Development Tools
EWAVR, EWAVR-BL
Development Tools By Supplier
ATAVRDRAGON, ATSTK500, ATSTK600, ATAVRISP2, ATAVRONEKIT, ATAVRRZ541, ATAVRRAVEN, ATAVRRZRAVEN, ATAVRRZUSBSTICK, ATAVRRZ201
Minimum Operating Temperature
- 40 C
On-chip Adc
8-ch x 10-bit
Controller Family/series
AVR MEGA
No. Of I/o's
32
Eeprom Memory Size
2KB
Ram Memory Size
4KB
Cpu Speed
20MHz
No. Of Timers
3
Rohs Compliant
Yes
Package
40PDIP
Device Core
AVR
Family Name
ATmega
Maximum Speed
20 MHz
For Use With
ATSTK600-TQFP44 - STK600 SOCKET/ADAPTER 44-TQFPATSTK600-DIP40 - STK600 SOCKET/ADAPTER 40-PDIP770-1007 - ISP 4PORT ATMEL AVR MCU SPI/JTAGATAVRISP2 - PROGRAMMER AVR IN SYSTEM
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ATMEGA644-20PU
Manufacturer:
Atmel
Quantity:
1 930
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- Download datasheet (8Mb)
Notes:
2593N–AVR–07/10
0x1B (0x3B)
0x1A (0x3A)
0x0E (0x2E)
0x0D (0x2D)
0x0C (0x2C)
0x0B (0x2B)
0x0A (0x2A)
0x19 (0x39)
0x18 (0x38)
0x17 (0x37)
0x16 (0x36)
0x15 (0x35)
0x14 (0x34)
0x13 (0x33)
0x12 (0x32)
0x11 (0x31)
0x10 (0x30)
0x0F (0x2F)
0x09 (0x29)
0x08 (0x28)
0x07 (0x27)
0x06 (0x26)
0x05 (0x25)
0x04 (0x24)
0x03 (0x23)
0x02 (0x22)
0x01 (0x21)
0x00 (0x20)
Address
1. For compatibility with future devices, reserved bits should be written to zero if accessed. Reserved I/O memory addresses
2. I/O registers within the address range $00 - $1F are directly bit-accessible using the SBI and CBI instructions. In these reg-
3. Some of the status flags are cleared by writing a logical one to them. Note that the CBI and SBI instructions will operate on
4. When using the I/O specific commands IN and OUT, the I/O addresses $00 - $3F must be used. When addressing I/O regis-
should never be written.
isters, the value of single bits can be checked by using the SBIS and SBIC instructions.
all bits in the I/O register, writing a one back into any flag read as set, thus clearing the flag. The CBI and SBI instructions
work with registers 0x00 to 0x1F only.
ters as data space using LD and ST instructions, $20 must be added to these addresses. The ATmega644 is a complex
microcontroller with more peripheral units than can be supported within the 64 location reserved in Opcode for the IN and
OUT instructions. For the Extended I/O space from $60 - $FF, only the ST/STS/STD and LD/LDS/LDD instructions can be
used.
PCIFR
Reserved
Reserved
Reserved
TIFR2
TIFR1
TIFR0
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
PORTD
DDRD
PIND
PORTC
DDRC
PINC
PORTB
DDRB
PINB
PORTA
DDRA
PINA
Name
PORTD7
PORTC7
PORTB7
PORTA7
PIND7
PINC7
PINB7
PINA7
DDD7
DDC7
DDB7
DDA7
Bit 7
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
PORTD6
PORTC6
PORTB6
PORTA6
PIND6
PINC6
PINB6
PINA6
DDD6
DDC6
DDB6
DDA6
Bit 6
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
PORTD5
PORTC5
PORTB5
PORTA5
PIND5
PINC5
PINB5
PINA5
DDD5
DDC5
DDB5
DDA5
Bit 5
ICF1
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
PORTD4
PORTC4
PORTB4
PORTA4
PIND4
PINC4
PINB4
PINA4
DDD4
DDC4
DDB4
DDA4
Bit 4
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
PORTD3
PORTC3
PORTB3
PORTA3
PCIF3
PIND3
PINC3
PINB3
PINA3
DDD3
DDC3
DDB3
DDA3
Bit 3
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
PORTD2
PORTC2
PORTB2
PORTA2
OCF2b
OCF1B
OCF0B
PCIF2
PIND2
PINC2
PINB2
PINA2
DDD2
DDC2
DDB2
DDA2
Bit 2
-
-
-
-
-
-
-
-
-
-
-
-
PORTD1
PORTC1
PORTB1
PORTA1
OCF2A
OCF1A
OCF0A
PCIF1
PIND1
PINC1
PINB1
PINA1
DDD1
DDC1
DDB1
DDA1
Bit 1
-
-
-
-
-
-
-
-
-
-
-
-
PORTD0
PORTC0
PORTB0
PORTA0
PIND0
PINC0
PINB0
PINA0
PCIF0
DDD0
DDC0
DDB0
DDA0
Bit 0
TOV2
TOV1
TOV0
ATmega644
-
-
-
-
-
-
-
-
-
-
-
-
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