ATMEGA16A-AUR Atmel, ATMEGA16A-AUR Datasheet - Page 65

• Manufacturer Part Number: ATMEGA16A-AUR
• Description: MCU AVR 16KB FLASH 16MHZ 44TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA16A-AUR

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 32
• Program Memory Size: 16KB (8K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 512 x 8
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

12.4
12.4.1
12.4.2
12.4.3
12.4.4
12.4.5
12.4.6
8154B–AVR–07/09
Register Description
SFIOR – Special Function I/O Register
PORTA – Port A Data Register
DDRA – Port A Data Direction Register
PINA – Port A Input Pins Address
PORTB – Port B Data Register
DDRB – Port B Data Direction Register
• Bit 2 – PUD: Pull-up disable
When this bit is written to one, the pull-ups in the I/O ports are disabled even if the DDxn and
PORTxn Registers are configured to enable the pull-ups ({DDxn, PORTxn} = 0b01). See
figuring the Pin” on page 50
Bit
Read/Write
Initial Value
Bit
Read/Write
Initial Value
Bit
Read/Write
Initial Value
Bit
Read/Write
Initial Value
Bit
Read/Write
Initial Value
Bit
Read/Write
Initial Value
ADTS2
PORTA7
PORTB7
PINA7
DDB7
DDA7
R/W
R/W
R/W
R/W
R/W
N/A
7
0
R
7
0
7
0
7
7
0
7
0
PORTA6
PORTB6
ADTS1
PINA6
DDB6
DDA6
R/W
R/W
R/W
R/W
R/W
N/A
R
6
0
6
0
6
6
0
6
0
6
0
for more details about this feature.
PORTA5
PORTB5
PINA5
DDB5
DDA5
ADTS0
R/W
R/W
R/W
R/W
N/A
R/W
5
0
R
5
0
5
0
5
5
0
5
0
PORTA4
PORTB4
PINA4
DDB4
DDA4
R/W
R/W
R/W
R/W
N/A
4
0
R
4
0
4
0
4
4
0
R
4
–
0
PORTA3
PORTB3
PINA3
DDB3
DDA3
R/W
R/W
R/W
R/W
N/A
3
0
R
3
0
ACME
3
0
3
3
0
R/W
3
0
PORTA2
PORTB2
PINA2
DDB2
DDA2
R/W
R/W
R/W
R/W
N/A
2
0
R
2
0
2
0
2
2
0
PUD
R/W
2
0
PORTA1
PORTB1
PINA1
DDB1
DDA1
R/W
R/W
R/W
R/W
N/A
PSR2
R/W
1
0
R
1
0
1
0
1
1
0
ATmega16A
1
0
PORTA0
PORTB0
PINA0
DDB0
PSR10
DDA0
R/W
R/W
R/W
R/W
N/A
R/W
0
0
R
0
0
0
0
0
0
0
0
0
PORTA
PORTB
DDRB
SFIOR
DDRA
PINA
“Con-
65