ATMEGA644P-A15MZ Atmel, ATMEGA644P-A15MZ Datasheet - Page 248

• Manufacturer Part Number: ATMEGA644P-A15MZ
• Description: MCU AVR 64KB FLASH 16MHZ 44QFN
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA644P-A15MZ

• Package / Case: 44-VQFN Exposed Pad
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Operating Temperature: -40°C ~ 125°C
• Speed: 16MHz
• Number Of I /o: 32
• Eeprom Size: 2K x 8
• Core Processor: AVR
• Program Memory Type: FLASH
• Ram Size: 4K x 8
• Program Memory Size: 64KB (64K x 8)
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Connectivity: I²C, SPI, UART/USART
• Core Size: 8-Bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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ATmega164P/324P/644P
Figure 21-5. ADC Timing Diagram, Single Conversion
Figure 21-6. ADC Timing Diagram, Auto Triggered Conversion
Figure 21-7. ADC Timing Diagram, Free Running Conversion
Cycle Number
ADC Clock
ADSC
ADIF
ADCH
ADCL
Cycle Number
ADC Clock
Trigger
Source
ADATE
ADIF
ADCH
ADCL
Prescaler
Reset
1
Cycle Number
ADC Clock
ADSC
ADIF
ADCH
ADCL
MUX and REFS
Update
1
2
MUX and REFS
Update
2
3
Conversion
Complete
3
Sample & Hold
One Conversion
4
11
Sample & Hold
4
5
12
5
6
6
13
7
One Conversion
7
One Conversion
Next Conversion
1
8
MSB of Result
LSB of Result
8
9
2
MUX and REFS
Update
9
Conversion
10
Conversion
Complete
10
3
Complete
11
11
Sample & Hold
4
12
12
13
13
MSB of Result
LSB of Result
MSB of Result
LSB of Result
Next Conversion
1
MUX and REFS
Update
Next Conversion
7674F–AVR–09/09
1
Prescaler
Reset
2
2
3