ATmega48P Atmel Corporation, ATmega48P Datasheet - Page 416

• Manufacturer Part Number: ATmega48P
• Manufacturer: Atmel Corporation

Specifications of ATmega48P

• 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: Yes
• 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

iv
ATmega48P/88P/168P
18 8-bit Timer/Counter2 with PWM and Asynchronous Operation ...... 142
19 SPI – Serial Peripheral Interface ......................................................... 164
20 USART0 ................................................................................................. 174
21 USART in SPI Mode ............................................................................. 202
18.1Features ..............................................................................................................142
18.2Overview .............................................................................................................142
18.3Timer/Counter Clock Sources .............................................................................143
18.4Counter Unit ........................................................................................................143
18.5Output Compare Unit ..........................................................................................144
18.6Compare Match Output Unit ................................................................................146
18.7Modes of Operation .............................................................................................147
18.8Timer/Counter Timing Diagrams .........................................................................151
18.9Asynchronous Operation of Timer/Counter2 .......................................................153
18.10Timer/Counter Prescaler ...................................................................................154
18.11Register Description ..........................................................................................156
19.1Features ..............................................................................................................164
19.2Overview .............................................................................................................164
19.3SS Pin Functionality ............................................................................................169
19.4Data Modes .........................................................................................................169
19.5Register Description ............................................................................................171
20.1Features ..............................................................................................................174
20.2Overview .............................................................................................................174
20.3Clock Generation .................................................................................................175
20.4Frame Formats ....................................................................................................178
20.5USART Initialization ............................................................................................180
20.6Data Transmission – The USART Transmitter ....................................................181
20.7Data Reception – The USART Receiver .............................................................184
20.8Asynchronous Data Reception ............................................................................188
20.9Multi-processor Communication Mode ................................................................191
20.10Register Description ..........................................................................................193
20.11Examples of Baud Rate Setting ........................................................................197
21.1Features ..............................................................................................................202
21.2Overview .............................................................................................................202
21.3Clock Generation .................................................................................................202
21.4SPI Data Modes and Timing ...............................................................................203
8025M–AVR–6/11