ATmega48A Atmel Corporation, ATmega48A Datasheet - Page 95
ATmega48A
Manufacturer Part Number
ATmega48A
Description
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
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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
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