ATmega48A Atmel Corporation, ATmega48A Datasheet - Page 95

• 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

14.4.8
14.4.9
14.4.10
8271D–AVR–05/11
PORTD – The Port D Data Register
DDRD – The Port D Data Direction Register
PIND – The Port D Input Pins Address
Note:
Bit
0x0B (0x2B)
Read/Write
Initial Value
Bit
0x0A (0x2A)
Read/Write
Initial Value
Bit
0x09 (0x29)
Read/Write
Initial Value
1. Writting to the pin register provides toggle functionality for IO (see
79)
PORTD7
PIND7
DDD7
R/W
R/W
R/W
N/A
7
0
7
0
7
ATmega48A/PA/88A/PA/168A/PA/328/P
PORTD6
PIND6
DDD6
R/W
R/W
(1)
R/W
N/A
6
0
6
0
6
PORTD5
PIND5
DDD5
R/W
R/W
R/W
N/A
5
0
5
0
5
PORTD4
PIND4
DDD4
R/W
R/W
R/W
N/A
4
0
4
0
4
PORTD3
PIND3
DDD3
R/W
R/W
R/W
N/A
3
0
3
0
3
PORTD2
PIND2
DDD2
R/W
R/W
R/W
N/A
2
0
2
0
2
PORTD1
PIND1
DDD1
R/W
R/W
R/W
”Toggling the Pin” on page
N/A
1
0
1
0
1
PORTD0
PIND0
DDD0
R/W
R/W
R/W
N/A
0
0
0
0
0
PORTD
DDRD
PIND
95