ATtiny43U Atmel Corporation, ATtiny43U Datasheet - Page 5

• 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

architecture is more code efficient while achieving throughputs up to ten times faster than con-
ventional CISC microcontrollers.
The ATtiny43U provides the following features: 4K byte of In-System Programmable Flash, 64
bytes EEPROM, 256 bytes SRAM, 16 general purpose I/O lines, 32 general purpose working
registers, two 8-bit Timer/Counters with two PWM channels, Internal and External Interrupts, a
4-channel 10-bit ADC, Universal Serial Interface, a programmable Watchdog Timer with internal
Oscillator, internal calibrated oscillator, and three software selectable power saving modes. The
Idle mode stops the CPU while allowing the SRAM, Timer/Counter, ADC, Analog Comparator,
and Interrupt system to continue functioning. The Power-down mode saves the register con-
tents, disabling all chip functions until the next Interrupt or Hardware Reset. The ADC Noise
Reduction mode stops the CPU and all I/O modules except ADC, to minimize switching noise
during ADC conversions.
A special feature of ATtiny43U is the built-in boost voltage converter, which provides 3V supply
voltage from an external, low voltage.
The device is manufactured using Atmel’s high density non-volatile memory technology. The
On-chip ISP Flash allows the Program memory to be re-programmed In-System through an SPI
serial interface, by a conventional non-volatile memory programmer or by an On-chip boot code
running on the AVR core.
The ATtiny43U AVR is supported by a full suite of program and system development tools
including: C Compilers, Macro Assemblers, Program Debugger/Simulators, In-Circuit Emulators,
and Evaluation kits.
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8048B–AVR–03/09