ATMEGA645A-AU Atmel, ATMEGA645A-AU Datasheet - Page 218
![IC MCU AVR 64K FLASH 64TQFP](/photos/12/13/121332/313-64-tqfp_sml.jpg)
ATMEGA645A-AU
Manufacturer Part Number
ATMEGA645A-AU
Description
IC MCU AVR 64K FLASH 64TQFP
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA645A-AU
Core Processor
AVR
Core Size
8-Bit
Speed
16MHz
Connectivity
SPI, UART/USART, USI
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
54
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
64-TQFP
Processor Series
ATmega
Core
AVR
Data Bus Width
8 bit
Data Ram Size
4 KB
Interface Type
SPI, USART
Maximum Clock Frequency
16 MHz
Number Of Programmable I/os
54
Number Of Timers
3
Operating Supply Voltage
3.3 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
Operating Temperature Range
- 40 C to + 85 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ATMEGA645A-AUR
Manufacturer:
HONEYWELL
Quantity:
101
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ATmega165A/165PA/325A/325PA/3250A/3250PA/645A/645P/645
In Free Running mode, a new conversion will be started immediately after the conversion com-
pletes, while ADSC remains high. For a summary of conversion times, see
Figure 22-4. ADC Timing Diagram, First Conversion (Single Conversion Mode)
Figure 22-5. ADC Timing Diagram, Single Conversion
Figure 22-6. ADC Timing Diagram, Auto Triggered Conversion
Cycle Number
ADC Clock
Trigger
Source
ADATE
ADIF
ADCH
ADCL
Cycle Number
ADC Clock
ADSC
ADIF
ADCH
ADCL
Cycle Number
ADC Clock
ADEN
ADSC
ADIF
ADCH
ADCL
Prescaler
Reset
1
1
2
MUX and REFS
Update
MUX and REFS
Update
1
2
MUX and REFS
Update
12
2
3
13
Sample & Hold
3
4
14
Sample &
Hold
4
5
15
5
6
Sample & Hold
16
First Conversion
6
17
7
One Conversion
18
7
8
One Conversion
19
8
9
20
9
10
Conversion
Complete
21
10
Conversion
11
22
Complete
Conversion
Complete
11
23
12
24
12
13
25
13
Sign and MSB of Result
Sign and MSB of Result
Table
LSB of Result
Next Conversion
Sign and MSB of Result
1
Next
Conversion
1
LSB of Result
LSB of Result
2
2
22-1.
MUX and REFS
Update
Next Conversion
8285B–AVR–03/11
MUX and REFS
Update
1
Prescaler
Reset
3
3
2
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