ATTINY44-20SSU Atmel, ATTINY44-20SSU Datasheet - Page 68

• Manufacturer Part Number: ATTINY44-20SSU
• Description: IC MCU AVR 4K FLASH 20MHZ 14SOIC
• Manufacturer: Atmel
• Series: AVR® ATtinyr

Specifications of ATTINY44-20SSU

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: USI
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 12
• Program Memory Size: 4KB (2K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 256 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: 14-SOIC (3.9mm Width), 14-SOL
• Cpu Family: ATtiny
• Device Core: AVR
• Device Core Size: 8b
• Frequency (max): 20MHz
• Interface Type: SPI/USI
• Total Internal Ram Size: 256Byte
• # I/os (max): 12
• Number Of Timers - General Purpose: 2
• Operating Supply Voltage (typ): 3.3/5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 2.7V
• On-chip Adc: 8-chx10-bit
• Instruction Set Architecture: RISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 14
• Package Type: SOIC
• For Use With: ATAVRISP2 - PROGRAMMER AVR IN SYSTEM
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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