ATmega48A Atmel Corporation, ATmega48A Datasheet - Page 559

• Manufacturer Part Number: ATmega48A
• Manufacturer: Atmel Corporation

Specifications of ATmega48A

• Flash (kbytes): 4 Kbytes
• Pin Count: 32
• Max. Operating Frequency: 20 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 12
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 23
• Ext Interrupts: 24
• Usb Speed: No
• Usb Interface: No
• Spi: 2
• Twi (i2c): 1
• Uart: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: Yes
• Crypto Engine: No
• Sram (kbytes): 0.5
• Eeprom (bytes): 256
• Self Program Memory: NO
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 1.8 to 5.5
• Operating Voltage (vcc): 1.8 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 3
• Output Compare Channels: 6
• Input Capture Channels: 1
• Pwm Channels: 6
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

Table of Contents
8271D–AVR–05/11
1
2
3
4
5
6
7
8
9
Features ..................................................................................................... 1
Pin Configurations ................................................................................... 2
Overview ................................................................................................... 5
Resources ................................................................................................. 8
Data Retention .......................................................................................... 8
About Code Examples ............................................................................. 8
Capacitive Touch Sensing ...................................................................... 8
AVR CPU Core .......................................................................................... 9
AVR Memories ........................................................................................ 17
System Clock and Clock Options ......................................................... 27
1.1Pin Descriptions ........................................................................................................3
2.1Block Diagram ...........................................................................................................5
2.2Comparison Between Processors .............................................................................6
7.1Overview ...................................................................................................................9
7.2ALU – Arithmetic Logic Unit ....................................................................................10
7.3Status Register ........................................................................................................10
7.4General Purpose Register File ................................................................................12
7.5Stack Pointer ...........................................................................................................13
7.6Instruction Execution Timing ...................................................................................14
7.7Reset and Interrupt Handling ..................................................................................15
8.1Overview .................................................................................................................17
8.2In-System Reprogrammable Flash Program Memory .............................................17
8.3SRAM Data Memory ...............................................................................................19
8.4EEPROM Data Memory ..........................................................................................20
8.5I/O Memory ..............................................................................................................21
8.6Register Description ................................................................................................22
9.1Clock Systems and their Distribution .......................................................................27
9.2Clock Sources .........................................................................................................28
9.3Low Power Crystal Oscillator ...................................................................................29
9.4Full Swing Crystal Oscillator ....................................................................................31
9.5Low Frequency Crystal Oscillator ............................................................................33
ATmega48A/PA/88A/PA/168A/PA/328/P
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