ATtiny84 Atmel Corporation, ATtiny84 Datasheet - Page 68

• Manufacturer Part Number: ATtiny84
• Manufacturer: Atmel Corporation

Specifications of ATtiny84

• Flash (kbytes): 8 Kbytes
• Pin Count: 14
• Max. Operating Frequency: 20 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 6
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 12
• Ext Interrupts: 12
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Twi (i2c): 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): 512
• Self Program Memory: YES
• 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: 2
• Output Compare Channels: 4
• Input Capture Channels: 1
• Pwm Channels: 4
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

10.3.4
10.3.5
10.3.6
10.3.7
68
ATtiny24/44/84
PINA – Port A Input Pins
PORTB – Port B Data Register
DDRB – Port B Data Direction Register
PINB – Port B Input Pins
Bit
0x19 (0x39)
Read/Write
Initial Value
Bit
0x18 (0x38)
Read/Write
Initial Value
Bit
0x17 (0x37)
Read/Write
Initial Value
Bit
0x16 (0x36)
Read/Write
Initial Value
PINA7
R/W
N/A
R
R
R
7
7
–
0
7
–
0
7
–
0
PINA6
R/W
N/A
R
R
6
R
0
6
6
–
0
6
–
0
–
PINA5
R/W
N/A
R
R
R
5
5
–
0
5
–
0
5
–
0
PINA4
R/W
N/A
R
R
R
4
–
0
4
4
–
0
4
–
0
PORTB3
PINB3
PINA3
DDB3
R/W
R/W
R/W
R/W
N/A
N/A
3
0
3
0
3
3
PORTB2
PINB2
PINA2
DDB2
R/W
R/W
R/W
R/W
N/A
N/A
2
2
2
0
2
0
PORTB1
PINB1
PINA1
DDB1
R/W
R/W
R/W
R/W
N/A
N/A
1
1
0
1
0
1
PORTB0
PINB0
PINA0
DDB0
R/W
R/W
R/W
N/A
R/W
N/A
0
0
0
0
0
0
8006K–AVR–10/10
PORTB
DDRB
PINB
PINA