ATmega48A Atmel Corporation, ATmega48A Datasheet - Page 563

• 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

8271D–AVR–05/11
22 2-wire Serial Interface .......................................................................... 216
23 Analog Comparator ............................................................................. 248
24 Analog-to-Digital Converter ................................................................ 252
25 debugWIRE On-chip Debug System .................................................. 269
21.5Frame Formats ....................................................................................................208
21.6Data Transfer ......................................................................................................210
21.7AVR USART MSPIM vs. AVR SPI ......................................................................212
21.8Register Description ............................................................................................213
22.1Features ..............................................................................................................216
22.22-wire Serial Interface Bus Definition ..................................................................216
22.3Data Transfer and Frame Format ........................................................................218
22.4Multi-master Bus Systems, Arbitration and Synchronization ...............................220
22.5Overview of the TWI Module ...............................................................................223
22.6Using the TWI ......................................................................................................225
22.7Transmission Modes ...........................................................................................229
22.8Multi-master Systems and Arbitration ..................................................................242
22.9Register Description ............................................................................................243
23.1Overview .............................................................................................................248
23.2Analog Comparator Multiplexed Input .................................................................248
23.3Register Description ............................................................................................249
24.1Features ..............................................................................................................252
24.2Overview .............................................................................................................252
24.3Starting a Conversion ..........................................................................................254
24.4Prescaling and Conversion Timing ......................................................................255
24.5Changing Channel or Reference Selection .........................................................257
24.6ADC Noise Canceler ...........................................................................................258
24.7ADC Conversion Result ......................................................................................263
24.8Temperature Measurement .................................................................................263
24.9Register Description ............................................................................................264
25.1Features ..............................................................................................................269
25.2Overview .............................................................................................................269
25.3Physical Interface ................................................................................................269
25.4Software Break Points .........................................................................................270
25.5Limitations of debugWIRE ...................................................................................270
25.6Register Description ............................................................................................270
ATmega48A/PA/88A/PA/168A/PA/328/P
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