ATMEGA32A-MNR Atmel, ATMEGA32A-MNR Datasheet - Page 346

• Manufacturer Part Number: ATMEGA32A-MNR
• Description: IC MCU AVR 32K 16MHZ 44VQFN
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA32A-MNR

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 32
• Program Memory Size: 32KB (16K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 1K x 8
• Ram Size: 2K 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-VFQFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Table of Contents
8155C–AVR–02/11
1
2
3
4
5
6
7
8
Features ..................................................................................................... 1
Pin Configurations ................................................................................... 2
Overview ................................................................................................... 3
Resources ................................................................................................. 6
Data Retention .......................................................................................... 6
About Code Examples ............................................................................. 6
AVR CPU Core .......................................................................................... 7
AVR Memories ........................................................................................ 16
System Clock and Clock Options ......................................................... 25
2.1
2.2
6.1
6.2
6.3
6.4
6.5
6.6
6.7
7.1
7.2
7.3
7.4
7.5
7.6
8.1
8.2
8.3
8.4
8.5
8.6
8.7
8.8
Block Diagram ...................................................................................................3
Pin Descriptions .................................................................................................4
Overview ............................................................................................................7
ALU – Arithmetic Logic Unit ...............................................................................8
Status Register ..................................................................................................8
General Purpose Register File ........................................................................10
Stack Pointer ...................................................................................................11
Instruction Execution Timing ...........................................................................12
Reset and Interrupt Handling ...........................................................................13
Overview ..........................................................................................................16
In-System Reprogrammable Flash Program Memory .....................................16
SRAM Data Memory ........................................................................................17
EEPROM Data Memory ..................................................................................19
I/O Memory ......................................................................................................20
Register Description ........................................................................................20
Clock Systems and their Distribution ...............................................................25
Clock Sources .................................................................................................26
Default Clock Source .......................................................................................26
Crystal Oscillator .............................................................................................27
Low-frequency Crystal Oscillator .....................................................................28
External RC Oscillator .....................................................................................29
Calibrated Internal RC Oscillator .....................................................................30
External Clock .................................................................................................30
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