ATmega48 Atmel Corporation, ATmega48 Datasheet - Page 373

• Manufacturer Part Number: ATmega48
• Manufacturer: Atmel Corporation

Specifications of ATmega48

• 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: No
• 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

2545T–AVR–05/11
22 2-wire serial interface .......................................................................... 209
23 Analog comparator .............................................................................. 241
24 Analog-to-digital converter ................................................................. 244
25 debugWIRE on-chip debug system .................................................... 260
26 Self-programming the flash, Atmel ATmega48 ................................. 262
21.8Register description .............................................................................................206
22.1Features ..............................................................................................................209
22.22-wire serial interface bus definition ....................................................................209
22.3Data transfer and frame format ...........................................................................210
22.4Multi-master bus systems, arbitration and synchronization .................................213
22.5Overview of the TWI module ...............................................................................216
22.6Using the TWI ......................................................................................................218
22.7Transmission modes ...........................................................................................222
22.8Multi-master systems and arbitration ...................................................................235
22.9Register description .............................................................................................236
23.1Overview .............................................................................................................241
23.2Analog comparator multiplexed input ..................................................................241
23.3Register description .............................................................................................242
24.1Features ..............................................................................................................244
24.2Overview .............................................................................................................244
24.3Starting a conversion ...........................................................................................246
24.4Prescaling and conversion timing ........................................................................247
24.5Changing channel or reference selection ............................................................249
24.6ADC noise canceler .............................................................................................250
24.7ADC conversion result .........................................................................................255
24.8Register description .............................................................................................255
25.1Features ..............................................................................................................260
25.2Overview .............................................................................................................260
25.3Physical interface ................................................................................................260
25.4Software break points ..........................................................................................261
25.5Limitations of debugWIRE ...................................................................................261
25.6Register description .............................................................................................261
26.1Overview .............................................................................................................262
26.2Addressing the flash during self-programming ....................................................263
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