ATtiny43U Atmel Corporation, ATtiny43U Datasheet - Page 2

• 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

1. Pin Configurations
Figure 1-1.
1.1
1.1.1
1.1.2
1.1.3
2
Pin Descriptions
ATtiny43U
V
GND
Port A (PA7:PA0)
CC
Pinout of ATtiny43U
Supply voltage.
Ground.
Port A is a 8-bit bi-directional I/O port with internal pull-up resistors (selected for each bit). The
Port A output buffers have symmetrical drive characteristics with both high sink and source
(USCK/SCL/PCINT14)
(DO/OC1B/PCINT13)
(T1/CLKO/PCINT11) PB
(DI/OC1A/PCINT12)
(USCK/SCL/PCINT14) PB6
(OC0B/PCINT9) PB2
(DO/OC1B/PCINT13) PB5
NOTE: Bottom pad should
(T1/CLKO/PCINT11) PB3
(DI/OC1A/PCINT12) PB4
be Soldered to ground.
(OC0B/PCINT10) PB2
(OC0A/PCINT9) PB1
(INT0/PCINT15) PB7
(T0/PCINT8) PB0
PB4
PB5
PB6
QFN/MLF Top View
3
GND
VCC
1
2
3
4
5
1
2
3
4
5
6
7
8
9
10
SOIC
20
19
18
17
16
15
14
13
12
11
15
14
13
12
11
PA7 (RESET/dW/PCINT7)
PA6 (CLKI/PCINT6)
PA5 (AIN1/PCINT5)
PA4 (AIN0/PCINT4)
PA3 (ADC3/PCINT3)
PA2 (ADC2/PCINT2)
PA1 (ADC1/PCINT1)
PA0 (ADC0/PCINT0)
VBAT
LSW
PA4 (AIN0/
PA3 (ADC3/
PA2 (ADC2/
PA1 (ADC1/
PA0 (ADC0/
PCINT4
PCINT3
PCINT2
PCINT1
PCINT0
)
)
)
)
)
8048BS–AVR–03/09