atmega32c1 ATMEL Corporation, atmega32c1 Datasheet - Page 359

• Manufacturer Part Number: atmega32c1
• Description: Atmega32m1 Automotive 8-bit Avr Microcontroller With 32k/64k Bytes In-system Programmable Flash
• Manufacturer: ATMEL Corporation

7647A–AVR–02/08
1
2
3
4
5
Features ..................................................................................................... 1
Pin Configurations ................................................................................... 3
Overview ................................................................................................... 7
AVR CPU Core ........................................................................................ 12
Memories ................................................................................................ 20
System Clock ......................................................................................... 29
1.1
2.1
2.2
2.3
2.4
3.1
3.2
3.3
3.4
3.5
3.6
3.7
3.8
4.1
4.2
4.3
4.4
4.5
5.1
5.2
5.3
5.4
5.5
5.6
5.7
5.8
5.9
5.10
Pin Descriptions .................................................................................................5
Block Diagram ...................................................................................................8
Automotive Quality Grade .................................................................................9
Pin Descriptions .................................................................................................9
About Code Examples .....................................................................................11
Introduction ......................................................................................................12
Architectural Overview .....................................................................................12
ALU – Arithmetic Logic Unit .............................................................................13
Status Register ................................................................................................14
General Purpose Register File ........................................................................15
Stack Pointer ...................................................................................................16
Instruction Execution Timing ...........................................................................16
Reset and Interrupt Handling ...........................................................................17
In-System Reprogrammable Flash Program Memory .....................................20
SRAM Data Memory ........................................................................................20
EEPROM Data Memory ..................................................................................22
I/O Memory ......................................................................................................28
General Purpose I/O Registers .......................................................................28
Clock Systems and their Distribution ...............................................................29
Clock Sources .................................................................................................30
Default Clock Source .......................................................................................31
Low Power Crystal Oscillator ...........................................................................31
Calibrated Internal RC Oscillator .....................................................................32
PLL ..................................................................................................................34
128 kHz Internal Oscillator ..............................................................................35
External Clock .................................................................................................35
Clock Output Buffer .........................................................................................36
System Clock Prescaler ..................................................................................36
ATmega32/64/M1/C1
359