ATMEGA644P-20PU Atmel, ATMEGA644P-20PU Datasheet - Page 435
ATMEGA644P-20PU
Manufacturer Part Number
ATMEGA644P-20PU
Description
IC MCU AVR 64K FLASH 40-DIP
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA644P-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/JTAG/SPI/USART
Maximum Clock Frequency
20 MHz
Number Of Programmable I/os
32
Number Of Timers
3
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
Minimum Operating Temperature
- 40 C
On-chip Adc
8-ch x 10-bit
For Use With
ATSTK600-TQFP44 - STK600 SOCKET/ADAPTER 44-TQFPATSTK600 - DEV KIT FOR AVR/AVR32770-1007 - 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:
ATMEGA644P-20PU
Manufacturer:
Atmel
Quantity:
1 984
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8011O–AVR–07/10
18 2-wire Serial Interface .......................................................................... 207
19 AC - Analog Comparator ..................................................................... 237
20 ADC - Analog-to-digital Converter ..................................................... 240
21 JTAG Interface and On-chip Debug System ..................................... 260
18.1 Features .............................................................................................................207
18.2 2-wire Serial Interface Bus Definition .................................................................207
18.3 Data Transfer and Frame Format .......................................................................208
18.4 Multi-master Bus Systems, Arbitration and Synchronization ..............................211
18.5 Overview of the TWI Module ..............................................................................213
18.6 Using the TWI .....................................................................................................215
18.7 Transmission Modes ..........................................................................................218
18.8 Multi-master Systems and Arbitration .................................................................231
18.9 Register Description ...........................................................................................232
19.1 Overview ............................................................................................................237
19.2 Analog Comparator Multiplexed Input ................................................................237
19.3 Register Description ...........................................................................................238
20.1 Features .............................................................................................................240
20.2 Overview ............................................................................................................240
20.3 Operation ............................................................................................................241
20.4 Starting a Conversion .........................................................................................242
20.5 Prescaling and Conversion Timing .....................................................................243
20.6 Changing Channel or Reference Selection ........................................................246
20.7 ADC Noise Canceler ..........................................................................................248
20.8 ADC Conversion Result .....................................................................................253
20.9 Register Description ...........................................................................................255
21.1 Features .............................................................................................................260
21.2 Overview ............................................................................................................260
21.3 TAP – Test Access Port .....................................................................................260
21.4 TAP Controller ....................................................................................................262
21.5 Using the Boundary-scan Chain .........................................................................263
21.6 Using the On-chip Debug System ......................................................................263
21.7 On-chip Debug Specific JTAG Instructions ........................................................264
21.8 Using the JTAG Programming Capabilities ........................................................264
21.9 Bibliography ........................................................................................................265
21.10 Register Description .........................................................................................265
ATmega164P/324P/644P
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