ATMEGA644-20PU Atmel, ATMEGA644-20PU Datasheet - Page 332
![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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Example
27.4
332
Power-down Supply Current
ATmega644
Table 27-2.
It is possible to calculate the typical current consumption based on the numbers from
for other V
Calculate the expected current consumption in idle mode with USART0, TIMER1, and TWI
enabled at V
add 17% for the USART0, 24% for the TWI, and 10% for the TIMER1 module. Reading from
ure 27-6 on page
= 1 MHz. The total current consumption in idle mode with USART0, TIMER1, and TWI enabled,
gives:
Figure 27-11. Power-down Supply Current vs. V
I
PRR bit
PRUSART0
PRTWI
PRTIM2
PRTIM1
PRTIM0
PRSPI
PRADC
CC
total
≈
0.11mA
CC
2.5
1.5
0.5
3
2
1
0
CC
and frequency settings than listed in
1.5
Additional Current Consumption (percentage) in Active and Idle mode
= 2.0V and F = 1 MHz. From
•
(
329, we find that the idle current consumption is ~0.11 mA at V
1
Additional Current consumption
compared to Active with external
clock (see
326
3.0%
4.4%
4.3%
1.8%
1.5%
3.3%
4.5%
+
0.117
and
2
Figure 27-2 on page
+
Figure 27-1 on page
0.24
2.5
+
0.10
WATCHDOG TIMER DISABLED
)
3
≈
0.166mA
V
Table
327)
CC
3.5
(V)
CC
Table
(Watchdog Timer Disabled)
27-2, third column, we see that we need to
Additional Current consumption
compared to Idle with external
clock (see
329
17%
24%
23%
10%
8.0%
18%
24%
4
27-2.
and
Figure 27-7 on page
4.5
Figure 27-6 on page
5
5.5
CC
329)
-40°C
2593N–AVR–07/10
85°C
25°C
= 2.0V and F
Table 27-1
Fig-
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