ATMEGA644P-20MU Atmel, ATMEGA644P-20MU Datasheet - Page 330
ATMEGA644P-20MU
Manufacturer Part Number
ATMEGA644P-20MU
Description
IC MCU AVR 64K FLASH 44-QFN
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA644P-20MU
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
44-VQFN Exposed Pad
Processor Series
ATMEGA64x
Core
AVR8
Data Bus Width
8 bit
Data Ram Size
4 KB
Interface Type
2-Wire, JTAG, SPI
Maximum Clock Frequency
20 MHz
Number Of Programmable I/os
32
Number Of Timers
5
Operating Supply Voltage
2.7 V to 5.5 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
EWAVR, EWAVR-BL
Development Tools By Supplier
ATAVRDRAGON, ATSTK500, ATSTK600, ATAVRISP2, ATAVRONEKIT
Minimum Operating Temperature
- 40 C
On-chip Adc
10 bit, 8 Channel
Controller Family/series
AVR MEGA
No. Of I/o's
32
Eeprom Memory Size
2KB
Ram Memory Size
4KB
Cpu Speed
20MHz
Rohs Compliant
Yes
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
Part Number:
ATMEGA644P-20MU
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
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25.3
Table 25-4.
Notes:
25.3.1
25.3.2
Table 25-5.
8011O–AVR–07/10
Factory
Calibration
User
Calibration
Symbol
1/t
t
t
t
t
t
Δ
CLCL
CHCX
CLCX
CLCH
CHCL
t
CLCL
CLCL
Clock Characteristics
1. Voltage range for ATmega164PV/324PV/644PV.
2. Voltage range for ATmega164P/324P/644P.
External Clock Drive Waveforms
External Clock Drive
Calibration Accuracy of Internal RC Oscillator
External Clock Drive
Parameter
Oscillator Frequency
Clock Period
High Time
Low Time
Rise Time
Fall Time
Change in period from
one clock cycle to the
next
Figure 25-3. External Clock Drive Waveforms
7.3 MHz - 8.1 MHz
Frequency
8.0 MHz
V
V
Min.
IL1
250
100
100
CC
0
V
IH1
= 1.8V - 5.5V
1.8V - 5.5V
2.7V - 5.5V
Max.
2.0
2.0
4
2
V
3V
CC
(1)
(2)
Min.
V
100
40
40
0
CC
= 2.7V - 5.5V
ATmega164P/324P/644P
Max.
Temperature
-40°C - 85°C
1.6
1.6
10
2
25°C
V
Min.
50
20
20
CC
0
= 4.5V - 5.5V
Calibration Accuracy
Max.
0.5
0.5
20
2
±10%
±1%
Units
MHz
ns
μs
%
330
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