ATMEGA644-20PU datasheet, PDF - EEWORLD Datasheet

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ATMEGA644-20PU: DescriptionIC MCU 8BIT 64KB FLASH 40DIP; CategoryThe embedded processor and controller Microcontrollers and processors; File Size6MB，376 Pages; ManufacturerMicrochip; Websitehttps://www.microchip.com; Environmental Compliance

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ATMEGA644-20PU Overview

IC MCU 8BIT 64KB FLASH 40DIP

ATMEGA644-20PU Parametric

Parameter Name	Attribute value
Is it lead-free?	Lead free
Is it Rohs certified?	conform to
Maker	Microchip
package instruction	DIP, DIP40,.6
Reach Compliance Code	compliant
Factory Lead Time	6 weeks
Samacsys Description	8-bit Microcontrollers - MCU 64kB Flash 2kB EEPROM 32 I/O Pins
Has ADC	YES
Other features	ALSO OPERATES AT 2.7V SUPPLY AT 10 MHZ
Address bus width
bit size	8
CPU series	AVR RISC
maximum clock frequency	16 MHz
DAC channel	NO
DMA channel	NO
External data bus width
JESD-30 code	R-PDIP-T40
JESD-609 code	e3
length	52.324 mm
Humidity sensitivity level	1
Number of I/O lines	32
Number of terminals	40
Maximum operating temperature	85 °C
Minimum operating temperature	-40 °C
PWM channel	YES
Package body material	PLASTIC/EPOXY
encapsulated code	DIP
Encapsulate equivalent code	DIP40,.6
Package shape	RECTANGULAR
Package form	IN-LINE
Peak Reflow Temperature (Celsius)	NOT APPLICABLE
power supply	3/5 V
Certification status	Not Qualified
RAM (bytes)	4096
rom(word)	32768
ROM programmability	FLASH
Maximum seat height	4.826 mm
speed	20 MHz
Maximum slew rate	9 mA
Maximum supply voltage	5.5 V
Minimum supply voltage	4.5 V
Nominal supply voltage	5 V
surface mount	NO
technology	CMOS
Temperature level	INDUSTRIAL
Terminal surface	Matte Tin (Sn)
Terminal form	THROUGH-HOLE
Terminal pitch	2.54 mm
Terminal location	DUAL
Maximum time at peak reflow temperature	NOT APPLICABLE
width	15.24 mm
uPs/uCs/peripheral integrated circuit type	MICROCONTROLLER, RISC
Base Number Matches	1

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Features

•

High-performance, Low-power Atmel

AVR

8-bit Microcontroller

•

Advanced RISC Architecture

– 131 Powerful Instructions – Most Single-clock Cycle Execution

– 32 × 8 General Purpose Working Registers

– Fully Static Operation

– Up to 20 MIPS Throughput at 20MHz

High Endurance Non-volatile Memory segments

– 64 Kbytes of In-System Self-programmable Flash program memory

– 2 Kbytes EEPROM

– 4 Kbytes Internal SRAM

– Write/Erase cyles: 10,000 Flash/100,000 EEPROM

(1)(3)

– Data retention: 20 years at 85°C/100 years at 25°C

(2)(3)

– Optional Boot Code Section with Independent Lock Bits

In-System Programming by On-chip Boot Program

True Read-While-Write Operation

– Programming Lock for Software Security

JTAG (IEEE std. 1149.1 Compliant) Interface

– Boundary-scan Capabilities According to the JTAG Standard

– Extensive On-chip Debug Support

– Programming of Flash, EEPROM, Fuses, and Lock Bits through the JTAG Interface

Peripheral Features

– Two 8-bit Timer/Counters with Separate Prescalers and Compare Modes

– One 16-bit Timer/Counter with Separate Prescaler, Compare Mode, and Capture

Mode

– Real Time Counter with Separate Oscillator

– Six PWM Channels

– 8-channel, 10-bit ADC

Differential mode with selectable gain at 1x, 10x or 200x

– Byte-oriented Two-wire Serial Interface

– One Programmable Serial USART

– Master/Slave SPI Serial Interface

– Programmable Watchdog Timer with Separate On-chip Oscillator

– On-chip Analog Comparator

– Interrupt and Wake-up on Pin Change

Special Microcontroller Features

– Power-on Reset and Programmable Brown-out Detection

– Internal Calibrated RC Oscillator

– External and Internal Interrupt Sources

– Six Sleep Modes: Idle, ADC Noise Reduction, Power-save, Power-down, Standby

and Extended Standby

I/O and Packages

– 32 Programmable I/O Lines

– 40-pin PDIP, 44-lead TQFP, and 44-pad QFN/MLF

Speed Grades

– ATmega644V: 0 - 4MHz @ 1.8V - 5.5V, 0 - 10MHz @ 2.7V - 5.5V

– ATmega644: 0 - 10MHz @ 2.7V - 5.5V, 0 - 20MHz @ 4.5V - 5.5V

Power Consumption at 1MHz, 3V, 25⋅C

– Active: 240µA @ 1.8V, 1MHz

– Power-down Mode: 0.1µA @ 1.8V

•

8-bit Atmel

Microcontroller

with 64K Bytes

In-System

Programmable

Flash

ATmega644/V

•

Notes:

1. Worst case temperature. Guaranteed after last write cycle.

2. Failure rate less than 1 ppm.

3. Characterized through accelerated tests.

2593O–AVR–02/12

The AVR core combines a rich instruction set with 32 general purpose working registers. All the

32 registers are directly connected to the Arithmetic Logic Unit (ALU), allowing two independent

registers to be accessed in one single instruction executed in one clock cycle. The resulting

architecture is more code efficient while achieving throughputs up to ten times faster than con-

ventional CISC microcontrollers.

The ATmega644 provides the following features: 64 Kbytes of In-System Programmable Flash

with Read-While-Write capabilities, 2 Kbytes EEPROM, 4 Kbytes SRAM, 32 general purpose I/O

lines, 32 general purpose working registers, Real Time Counter (RTC), three flexible

Timer/Counters with compare modes and PWM, 2 USARTs, a byte oriented 2-wire Serial Inter-

face, a 8-channel, 10-bit ADC with optional differential input stage with programmable gain,

programmable Watchdog Timer with Internal Oscillator, an SPI serial port, IEEE std. 1149.1

compliant JTAG test interface, also used for accessing the On-chip Debug system and program-

ming and six software selectable power saving modes. The Idle mode stops the CPU while

allowing the SRAM, Timer/Counters, SPI port, and interrupt system to continue functioning. The

Power-down mode saves the register contents but freezes the Oscillator, disabling all other chip

functions until the next interrupt or Hardware Reset. In Power-save mode, the asynchronous

timer continues to run, allowing the user to maintain a timer base while the rest of the device is

sleeping. The ADC Noise Reduction mode stops the CPU and all I/O modules except Asynchro-

nous Timer and ADC, to minimize switching noise during ADC conversions. In Standby mode,

the Crystal/Resonator Oscillator is running while the rest of the device is sleeping. This allows

very fast start-up combined with low power consumption. In Extended Standby mode, both the

main Oscillator and the Asynchronous Timer continue to run.

The device is manufactured using Atmel’s high-density nonvolatile memory technology. The On-

chip ISP Flash allows the program memory to be reprogrammed in-system through an SPI serial

interface, by a conventional nonvolatile memory programmer, or by an On-chip Boot program

running on the AVR core. The boot program can use any interface to download the application

program in the application Flash memory. Software in the Boot Flash section will continue to run

while the Application Flash section is updated, providing true Read-While-Write operation. By

combining an 8-bit RISC CPU with In-System Self-Programmable Flash on a monolithic chip,

the Atmel ATmega644 is a powerful microcontroller that provides a highly flexible and cost effec-

tive solution to many embedded control applications.

The ATmega644 AVR is supported with a full suite of program and system development tools

including: C compilers, macro assemblers, program debugger/simulators, in-circuit emulators,

and evaluation kits.

2.2

2.2.1

Pin Descriptions

VCC

Digital supply voltage.

2.2.2

GND

Ground.

2.2.3

Port A (PA7:PA0)

Port A serves as analog inputs to the Analog-to-digital Converter.

Port A also serves as an 8-bit bi-directional I/O port with internal pull-up resistors (selected for

each bit). The Port A output buffers have symmetrical drive characteristics with both high sink

ATmega644

2593O–AVR–02/12

ATmega644

and source capability. As inputs, Port A pins that are externally pulled low will source current if

the pull-up resistors are activated. The Port A pins are tri-stated when a reset condition becomes

active, even if the clock is not running.

Port A also serves the functions of various special features of the ATmega644 as listed on

page

73.

2.2.4

Port B (PB7:PB0)

Port B is an 8-bit bi-directional I/O port with internal pull-up resistors (selected for each bit). The

Port B output buffers have symmetrical drive characteristics with both high sink and source

capability. As inputs, Port B pins that are externally pulled low will source current if the pull-up

resistors are activated. The Port B pins are tri-stated when a reset condition becomes active,

even if the clock is not running.

Port B also serves the functions of various special features of the ATmega644 as listed on

page

75.

2.2.5

Port C (PC7:PC0)

Port C is an 8-bit bi-directional I/O port with internal pull-up resistors (selected for each bit). The

Port C output buffers have symmetrical drive characteristics with both high sink and source

capability. As inputs, Port C pins that are externally pulled low will source current if the pull-up

resistors are activated. The Port C pins are tri-stated when a reset condition becomes active,

even if the clock is not running.

Port C also serves the functions of the JTAG interface, along with special features of the

ATmega644 as listed on

page 78.

2.2.6

Port D (PD7:PD0)

Port D is an 8-bit bi-directional I/O port with internal pull-up resistors (selected for each bit). The

Port D output buffers have symmetrical drive characteristics with both high sink and source

capability. As inputs, Port D pins that are externally pulled low will source current if the pull-up

resistors are activated. The Port D pins are tri-stated when a reset condition becomes active,

even if the clock is not running.

Port D also serves the functions of various special features of the ATmega644 as listed on

page

80.

2.2.7

RESET

Reset input. A low level on this pin for longer than the minimum pulse length will generate a

reset, even if the clock is not running. The minimum pulse length is given in

”System and Reset

Characteristics” on page 320.

Shorter pulses are not guaranteed to generate a reset.

2.2.8

XTAL1

Input to the inverting Oscillator amplifier and input to the internal clock operating circuit.

2.2.9

XTAL2

Output from the inverting Oscillator amplifier.

2593O–AVR–02/12

ATMEGA644-20PU Related Products

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Description	IC MCU 8BIT 64KB FLASH 40DIP	8-bit Microcontrollers - MCU AVR 64K FLSH 4K SRAM 2KB EE-20MHZ 5V IND	8-bit Microcontrollers - MCU AVR 64KB FLSH 2KB EE 4KB SRAM-10MHz, 1.8V	8-bit Microcontrollers - MCU AVR 64K FLASH 2K EE 4K SRAM ADC-10MHZ	8-bit Microcontrollers - MCU 64kB Flash 2kB EEPROM 32 I/O Pins	8-bit Microcontrollers - MCU AVR 64KB FLSH 2KB EE 4KB SRAM-10MHz, 1.8V	8-bit Microcontrollers - MCU 64kB Flash 2kB EEPROM 32 I/O Pins	8-bit Microcontrollers - MCU 64kB Flash 2kB EEPROM 32 I/O Pins	IC MCU 8BIT 64KB FLASH 44TQFP
Is it lead-free?	Lead free	Lead free	Lead free	Lead free	Lead free	Lead free	Lead free	Lead free	Lead free
Is it Rohs certified?	conform to	conform to	conform to	conform to	conform to	conform to	conform to	conform to	conform to
Maker	Microchip	Microchip	Microchip	Microchip	Microchip	Microchip	Microchip	Microchip	Microchip
package instruction	DIP, DIP40,.6	HVQCCN, LCC44,.28SQ,20	TQFP, TQFP44,.47SQ,32	HVQCCN, LCC44,.28SQ,20	TQFP, TQFP44,.47SQ,32	HVQCCN, LCC44,.28SQ,20	DIP, DIP40,.6	TQFP, TQFP44,.47SQ,32	TQFP, TQFP44,.47SQ,32
Reach Compliance Code	compliant	compliant	compliant	compliant	compliant	compliant	compliant	compliant	compliant
Factory Lead Time	6 weeks	16 weeks	4 weeks	4 weeks	4 weeks 3 days	7 weeks	4 weeks	7 weeks	7 weeks
Has ADC	YES	YES	YES	YES	YES	YES	YES	YES	YES
Other features	ALSO OPERATES AT 2.7V SUPPLY AT 10 MHZ	ALSO OPERATES AT 2.7V SUPPLY AT 10 MHZ	ALSO OPERATES AT 1.8V SUPPLY AT 4 MHZ	ALSO OPERATES AT 1.8V SUPPLY AT 4 MHZ	ALSO OPERATES AT 2.7V SUPPLY AT 10 MHZ	ALSO OPERATES AT 1.8V SUPPLY AT 4 MHZ	ALSO OPERATES AT 1.8V SUPPLY AT 4 MHZ	ALSO OPERATES AT 1.8V SUPPLY AT 4 MHZ	ALSO OPERATES AT 2.7V SUPPLY AT 10 MHZ
bit size	8	8	8	8	8	8	8	8	8
CPU series	AVR RISC	AVR RISC	AVR RISC	AVR RISC	AVR RISC	AVR RISC	AVR RISC	AVR RISC	AVR RISC
maximum clock frequency	16 MHz	16 MHz	8 MHz	8 MHz	16 MHz	8 MHz	8 MHz	8 MHz	16 MHz
DAC channel	NO	NO	NO	NO	NO	NO	NO	NO	NO
DMA channel	NO	NO	NO	NO	NO	NO	NO	NO	NO
JESD-30 code	R-PDIP-T40	S-XQCC-N44	S-PQFP-G44	S-XQCC-N44	S-PQFP-G44	S-XQCC-N44	R-PDIP-T40	S-PQFP-G44	S-PQFP-G44
JESD-609 code	e3	e3	e3	e3	e3	e3	e3	e3	e3
length	52.324 mm	7 mm	10 mm	7 mm	10 mm	7 mm	52.324 mm	10 mm	10 mm
Humidity sensitivity level	1	3	3	3	3	3	1	3	3
Number of I/O lines	32	32	32	32	32	32	32	32	32
Number of terminals	40	44	44	44	44	44	40	44	44
Maximum operating temperature	85 °C	85 °C	85 °C	85 °C	85 °C	85 °C	85 °C	85 °C	85 °C
Minimum operating temperature	-40 °C	-40 °C	-40 °C	-40 °C	-40 °C	-40 °C	-40 °C	-40 °C	-40 °C
PWM channel	YES	YES	YES	YES	YES	YES	YES	YES	YES
Package body material	PLASTIC/EPOXY	UNSPECIFIED	PLASTIC/EPOXY	UNSPECIFIED	PLASTIC/EPOXY	UNSPECIFIED	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY
encapsulated code	DIP	HVQCCN	TQFP	HVQCCN	TQFP	HVQCCN	DIP	TQFP	TQFP
Encapsulate equivalent code	DIP40,.6	LCC44,.28SQ,20	TQFP44,.47SQ,32	LCC44,.28SQ,20	TQFP44,.47SQ,32	LCC44,.28SQ,20	DIP40,.6	TQFP44,.47SQ,32	TQFP44,.47SQ,32
Package shape	RECTANGULAR	SQUARE	SQUARE	SQUARE	SQUARE	SQUARE	RECTANGULAR	SQUARE	SQUARE
Package form	IN-LINE	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE	FLATPACK, THIN PROFILE	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE	FLATPACK, THIN PROFILE	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE	IN-LINE	FLATPACK, THIN PROFILE	FLATPACK, THIN PROFILE
Peak Reflow Temperature (Celsius)	NOT APPLICABLE	260	260	260	260	260	NOT APPLICABLE	260	260
power supply	3/5 V	3/5 V	2/5 V	2/5 V	3/5 V	2/5 V	2/5 V	2/5 V	3/5 V
Certification status	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified
RAM (bytes)	4096	4096	4096	4096	4096	4096	4096	4096	4096
rom(word)	32768	32768	32768	32768	32768	32768	32768	32768	32768
ROM programmability	FLASH	FLASH	FLASH	FLASH	FLASH	FLASH	FLASH	FLASH	FLASH
Maximum seat height	4.826 mm	1 mm	1.2 mm	1 mm	1.2 mm	1 mm	4.826 mm	1.2 mm	1.2 mm
speed	20 MHz	20 MHz	10 MHz	10 MHz	20 MHz	10 MHz	10 MHz	10 MHz	20 MHz
Maximum slew rate	9 mA	9 mA	0.5 mA	0.5 mA	9 mA	0.5 mA	0.5 mA	0.5 mA	9 mA
Maximum supply voltage	5.5 V	5.5 V	5.5 V	5.5 V	5.5 V	5.5 V	5.5 V	5.5 V	5.5 V
Minimum supply voltage	4.5 V	4.5 V	2.7 V	2.7 V	4.5 V	2.7 V	2.7 V	2.7 V	4.5 V
Nominal supply voltage	5 V	5 V	3 V	3 V	5 V	3 V	3 V	3 V	5 V
surface mount	NO	YES	YES	YES	YES	YES	NO	YES	YES
technology	CMOS	CMOS	CMOS	CMOS	CMOS	CMOS	CMOS	CMOS	CMOS
Temperature level	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL
Terminal surface	Matte Tin (Sn)	Matte Tin (Sn)	Matte Tin (Sn)	Matte Tin (Sn)	Matte Tin (Sn)	Matte Tin (Sn)	Matte Tin (Sn)	Matte Tin (Sn)	Matte Tin (Sn)
Terminal form	THROUGH-HOLE	NO LEAD	GULL WING	NO LEAD	GULL WING	NO LEAD	THROUGH-HOLE	GULL WING	GULL WING
Terminal pitch	2.54 mm	0.5 mm	0.8 mm	0.5 mm	0.8 mm	0.5 mm	2.54 mm	0.8 mm	0.8 mm
Terminal location	DUAL	QUAD	QUAD	QUAD	QUAD	QUAD	DUAL	QUAD	QUAD
Maximum time at peak reflow temperature	NOT APPLICABLE	40	40	40	40	40	NOT APPLICABLE	40	40
width	15.24 mm	7 mm	10 mm	7 mm	10 mm	7 mm	15.24 mm	10 mm	10 mm
uPs/uCs/peripheral integrated circuit type	MICROCONTROLLER, RISC	MICROCONTROLLER, RISC	MICROCONTROLLER, RISC	MICROCONTROLLER, RISC	MICROCONTROLLER, RISC	MICROCONTROLLER, RISC	MICROCONTROLLER, RISC	MICROCONTROLLER, RISC	MICROCONTROLLER, RISC
Base Number Matches	1	1	1	1	1	1	1	1	1

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