ATtiny43U Atmel Corporation, ATtiny43U Datasheet - Page 75
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ATtiny43U
Manufacturer Part Number
ATtiny43U
Description
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
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PCINT10: Pin Change Interrupt source 10. The PB2 pin can serve as an external interrupt
source for pin change interrupt 1.
• Port B, Bit 3 – T1/CLKO/PCINT11
T1: Timer/Counter1 Counter source.
CLKO: System Clock Output. The system clock can be output on the PB3 pin. The system clock
will be output if the CKOUT Fuse is programmed, regardless of the PORTB3 and DDB3 settings.
It will also be output during reset.
PCINT11: Pin Change Interrupt source 11. The PB3 pin can serve as an external interrupt
source for pin change interrupt 1.
• Port B, Bit 4 – DI/SDA/OC1A/PCINT12
DI: Data Input in USI Three-wire mode. USI Three-wire mode does not override normal port
functions, so pin must be configure as an input for DI function.
SDA: Two-wire mode Serial Interface Data.
OC1A, Output Compare Match output: The PB4 pin can serve as an external output for the
Timer/Counter1 Compare Match A. The PB4 pin has to be configured as an output (DDB4 set
(one)) to serve this function. The OC1A pin is also the output pin for the PWM mode timer
function.
PCINT12: Pin Change Interrupt source 12. The PB4 pin can serve as an external interrupt
source for pin change interrupt 1.
• Port B, Bit 5 – DO/OC1B/PCINT13
DO: Data Output in USI Three-wire mode. Data output (DO) overrides PORTB5 value and it is
driven to the port when the data direction bit DDB5 is set (one). However the PORTB5 bit still
controls the pullup, enabling pullup if direction is input and PORTB5 is set (one).
OC1B: Output Compare Match output: The PB5 pin can serve as an external output for the
Timer/Counter1 Compare Match B. The PB5 pin has to be configured as an output (DDB5 set
(one)) to serve this function. The OC1B pin is also the output pin for the PWM mode timer
function.
PCINT13: Pin Change Interrupt source 13. The PB5 pin can serve as an external interrupt
source for pin change interrupt 1.
• Port B, Bit 6 – USCK/SCL/PCINT14
USCK: Three-wire mode Universal Serial Interface Clock.
SCL: Two-wire mode Serial Clock for USI Two-wire mode.
PCINT14: Pin Change Interrupt source 14. The PB6 pin can serve as an external interrupt
source for pin change interrupt 1.
• Port B, Bit 7 – INT0/PCINT15
INT0: External Interrupt Request 0.
PCINT15: Pin Change Interrupt source 15. The PB7 pin can serve as an external interrupt
source for pin change interrupt 1.
75
8048B–AVR–03/09
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