ATmega48 Atmel Corporation, ATmega48 Datasheet - Page 370

• 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
10 Power management and sleep modes ................................................. 39
11 System control and reset ...................................................................... 45
12 Interrupts ................................................................................................ 56
13 External interrupts ................................................................................. 66
9.5Low frequency crystal oscillator ..............................................................................33
9.6Calibrated internal RC oscillator ..............................................................................33
9.7128kHz internal oscillator ........................................................................................34
9.8External clock ..........................................................................................................35
9.9Clock output buffer ..................................................................................................35
9.10Timer/counter oscillator .........................................................................................36
9.11System clock prescaler .........................................................................................36
9.12Register description ...............................................................................................37
10.1Sleep modes .........................................................................................................39
10.2Idle mode ...............................................................................................................39
10.3ADC noise reduction mode ...................................................................................40
10.4Power-down mode ................................................................................................40
10.5Power-save mode .................................................................................................40
10.6Standby mode .......................................................................................................41
10.7Power reduction register .......................................................................................41
10.8Minimizing power consumption .............................................................................41
10.9Register description ...............................................................................................43
11.1Resetting the AVR .................................................................................................45
11.2Reset sources .......................................................................................................45
11.3Power-on reset ......................................................................................................46
11.4External reset ........................................................................................................47
11.5Brown-out detection ..............................................................................................47
11.6Watchdog system reset .........................................................................................48
11.7Internal voltage reference ......................................................................................48
11.8Watchdog timer .....................................................................................................49
11.9Register description ...............................................................................................53
12.1Overview ...............................................................................................................56
12.2Interrupt vectors in ATmega48 ..............................................................................56
12.3Interrupt vectors in Atmel ATmega88 ....................................................................58
12.4Interrupt vectors in Atmel ATmega168 ..................................................................61
12.5Register description ...............................................................................................64
ATmega48/88/168
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