ATmega8HVA Atmel Corporation, ATmega8HVA Datasheet - Page 73

• Manufacturer Part Number: ATmega8HVA
• Manufacturer: Atmel Corporation

Specifications of ATmega8HVA

• Flash (kbytes): 8 Kbytes
• Pin Count: 28
• Max. Operating Frequency: 4 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 3
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 6
• Ext Interrupts: 3
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 6
• Adc Resolution (bits): 12
• Adc Speed (ksps): 1.9
• Resistive Touch Screen: No
• Temp. Sensor: Yes
• Crypto Engine: No
• Sram (kbytes): 0.5
• Eeprom (bytes): 256
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -20 to 85
• I/o Supply Class: 1.8 to 9.0
• Operating Voltage (vcc): 1.8 to 9.0
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 2
• Output Compare Channels: 4
• Input Capture Channels: 2
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

15.4
15.4.1
15.4.2
15.4.3
15.4.4
15.4.5
15.4.6
15.4.7
8024A–AVR–04/08
Register Description
MCUCR – MCU Control 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
PINB – Port B Input Pins Address
• Bit 4 – 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 64
Bit
0x35 (0x55)
Read/Write
Initial Value
Bit
0x02 (0x22)
Read/Write
Initial Value
Bit
0x01 (0x21)
Read/Write
Initial Value
Bit
0x00 (0x20)
Read/Write
Initial Value
Bit
0x05 (0x25)
Read/Write
Initial Value
Bit
0x04 (0x24)
Read/Write
Initial Value
Bit
0x03 (0x23)
Read/Write
Initial Value
N/A
N/A
7
R
0
7
R
0
7
R
7
R
0
7
R
0
7
R
-
-
-
-
-
-
R
7
–
0
N/A
N/A
6
R
0
6
R
0
6
R
6
R
0
6
R
0
6
R
-
-
-
-
-
-
R
6
–
0
for more details about this feature.
N/A
N/A
R
R
R
R
R
R
5
0
5
0
5
5
0
5
0
5
-
-
-
-
-
-
CKOE
R/W
5
0
N/A
N/A
R
R
R
R
R
R
4
0
4
0
4
4
0
4
0
4
-
-
-
-
-
-
PUD
R/W
PORTB3
4
0
PINB3
DDB3
R/W
R/W
N/A
N/A
R
R
R
R
3
0
3
0
3
3
0
3
0
3
-
-
-
ATmega8HVA/16HVA
PORTB2
PINB2
DDB2
R
3
–
0
R/W
R/W
N/A
N/A
R/
R
R
R
2
0
2
0
2
2
0
2
0
2
-
-
-
PORTB1
PORTA1
PINA1
PINB1
DDA1
DDB1
R
R/W
R/W
R/W
R/W
R/W
2
–
0
N/A
N/A
R
1
0
1
0
1
1
0
1
0
1
PORTB0
PORTA0
R/W
PINA0
PINB0
DDA0
DDB0
R/W
R/W
R/W
R/W
R/W
1
–
0
N/A
N/A
R
0
0
0
0
0
0
0
0
0
0
PORTA
R/W
PORTB
DDRA
DDRB
PINA
PINB
0
–
0
MCUCR
”Con-
73