ATMEGA644V-10PU Atmel, ATMEGA644V-10PU Datasheet - Page 32
ATMEGA644V-10PU
Manufacturer Part Number
ATMEGA644V-10PU
Description
IC AVR MCU FLASH 64K 40DIP
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA644V-10PU
Core Processor
AVR
Core Size
8-Bit
Speed
10MHz
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)
1.8 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
8 bit
Operating Supply Voltage
1.8 V to 5.5 V
Maximum Operating Temperature
+ 85 C
Mounting Style
Through Hole
Minimum Operating Temperature
- 40 C
On-chip Adc
10 bit, 8 Channel
Package
40PDIP
Device Core
AVR
Family Name
ATmega
Maximum Speed
10 MHz
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
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7.5
32
Low Frequency Crystal Oscillator
ATmega644
Table 7-6.
Notes:
The device can utilize a 32.768 kHz watch crystal as clock source by a dedicated Low Fre-
quency Crystal Oscillator. The crystal should be connected as described in
Connections” on page
To find suitable load capacitance for a 32 kHz crysal, please consult the crystal datasheet.
When this Oscillator is selected, start-up times are determined by the SUT Fuses and CKSEL0
as shown in
Table 7-7.
Note:
Oscillator Source /
Power Conditions
Ceramic resonator, slowly
rising power
Crystal Oscillator, BOD
enabled
Crystal Oscillator, fast
rising power
Crystal Oscillator, slowly
rising power
Power Conditions
BOD enabled
Fast rising power
Slowly rising power
BOD enabled
Fast rising power
Slowly rising power
1. These options should only be used when not operating close to the maximum frequency of the
2. These options are intended for use with ceramic resonators and will ensure frequency stability
1. These options should only be used if frequency stability at start-up is not important for the
device, and only if frequency stability at start-up is not important for the application. These
options are not suitable for crystals.
at start-up. They can also be used with crystals when not operating close to the maximum fre-
quency of the device, and if frequency stability at start-up is not important for the application.
application.
Table
Start-up Times for the Full Swing Crystal Oscillator Clock Selection
Start-up Times for the Low Frequency Crystal Oscillator Clock Selection
7-7.
29.
Start-up Time from
Start-up Time from
Power-down and
Power-down and
Reserved
Reserved
Power-save
Power-save
16K CK
16K CK
16K CK
32K CK
32K CK
32K CK
1K CK
1K CK
1K CK
1K CK
Additional Delay
Additional Delay
14CK + 4.1 ms
14CK + 65 ms
14CK + 65 ms
14CK + 4.1 ms
14CK + 4.1 ms
14CK + 65 ms
14CK + 65 ms
(V
(V
from Reset
from Reset
CC
CC
14CK
14CK
14CK
= 5.0V)
= 5.0V)
(1)
(2)
(1)
(1)
CKSEL0
CKSEL0
1
1
1
1
0
0
0
0
1
1
1
1
”Clock Source
2593N–AVR–07/10
SUT1..0
SUT1..0
00
01
10
11
00
01
10
11
00
01
10
11
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