ATtiny43U Atmel Corporation, ATtiny43U Datasheet - Page 74

• Manufacturer Part Number: ATtiny43U
• Manufacturer: Atmel Corporation

Specifications of ATtiny43U

• Flash (kbytes): 4 Kbytes
• Pin Count: 20
• Max. Operating Frequency: 8 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 8
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 16
• Ext Interrupts: 16
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Twi (i2c): 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 4
• Adc Resolution (bits): 10
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: Yes
• Crypto Engine: No
• Sram (kbytes): 0.25
• Eeprom (bytes): 64
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: Yes
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 0.7 to 5.5
• Operating Voltage (vcc): 0.7 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 2
• Output Compare Channels: 4
• Pwm Channels: 4
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

11.3.2
74
ATtiny43U
Alternate Functions of Port B
The Port B pins with alternate function are shown in
Table 11-8.
• Port B, Bit 0 – T0/PCINT8
T0: Timer/Counter0 Counter Source.
PCINT8: Pin Change Interrupt source 8. The PB0 pin can serve as an external interrupt source
for pin change interrupt 1.
• Port B, Bit 1 – OC0A/PCINT9
OC0A: Output Compare Match output: The PB1 pin can serve as an external output for the
Timer/Counter0 Compare Match A. The PB1 pin has to be configured as an output (DDB1 set
(one)) to serve this function. The OC0A pin is also the output pin for the PWM mode timer
function.
PCINT9: Pin Change Interrupt source 9. The PB1 pin can serve as an external interrupt source
for pin change interrupt 1.
• Port B, Bit 2 – OC0B/PCINT10
OC0B: Output Compare Match output: The PB2 pin can serve as an external output for the
Timer/Counter0 Compare Match A. The PB2 pin has to be configured as an output (DDB2 set
(one)) to serve this function. The OC0B pin is also the output pin for the PWM mode timer
function.
Port Pin
PB0
PB1
PB3
PB4
PB5
PB6
PB7
PB2
Port B Pins Alternate Functions
Alternate Function
T0:
PCINT8: Pin change interrupt 1 source 8.
OC0A: Timer/Counter0 Compare Match A output.
PCINT9: Pin change interrupt 1 source 9.
OC0B: Timer/Counter0 Compare Match B output.
PCINT10:Pin change interrupt 1 source 10.
T1:
CLKO: System Clock Output.
PCINT11:Pin change interrupt 1 source 11.
OC1A: Timer/Counter1 Compare Match A output.
DI:
SDA:
PCINT12:Pin change interrupt 1 source 12.
OC1B: Timer/Counter1 Compare Match B output.
DO:
PCINT13:Pin change interrupt 1 source 13.
USCK: USI Clock three wire mode.
SCL:
PCINT14:Pin change interrupt 1 source 14.
INT0:
PCINT15:Pin change interrupt 1 source 15.
External Interrupt 0 input.
Timer/Counter0 Counter Source.
Timer/Counter1 Counter Source.
USI Data Input three wire mode.
USI Data Input two wire mode.
USI Data Output three wire mode.
USI Clock two wire mode.
Table 11-8 on page
74.
8048B–AVR–03/09