ATmega48A Atmel Corporation, ATmega48A Datasheet - Page 562

• 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
18 8-bit Timer/Counter2 with PWM and Asynchronous Operation ...... 146
19 SPI – Serial Peripheral Interface ......................................................... 168
20 USART0 ................................................................................................. 178
21 USART in SPI Mode ............................................................................. 206
18.1Features ..............................................................................................................146
18.2Overview .............................................................................................................146
18.3Timer/Counter Clock Sources .............................................................................147
18.4Counter Unit ........................................................................................................147
18.5Output Compare Unit ..........................................................................................148
18.6Compare Match Output Unit ................................................................................150
18.7Modes of Operation .............................................................................................151
18.8Timer/Counter Timing Diagrams .........................................................................155
18.9Asynchronous Operation of Timer/Counter2 .......................................................157
18.10Timer/Counter Prescaler ...................................................................................158
18.11Register Description ..........................................................................................160
19.1Features ..............................................................................................................168
19.2Overview .............................................................................................................168
19.3SS Pin Functionality ............................................................................................173
19.4Data Modes .........................................................................................................173
19.5Register Description ............................................................................................175
20.1Features ..............................................................................................................178
20.2Overview .............................................................................................................178
20.3Clock Generation .................................................................................................179
20.4Frame Formats ....................................................................................................182
20.5USART Initialization ............................................................................................184
20.6Data Transmission – The USART Transmitter ....................................................185
20.7Data Reception – The USART Receiver .............................................................188
20.8Asynchronous Data Reception ............................................................................192
20.9Multi-processor Communication Mode ................................................................195
20.10Examples of Baud Rate Setting ........................................................................196
20.11Register Description ..........................................................................................201
21.1Features ..............................................................................................................206
21.2Overview .............................................................................................................206
21.3Clock Generation .................................................................................................206
21.4SPI Data Modes and Timing ...............................................................................207
ATmega48A/PA/88A/PA/168A/PA/328/P
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