ATtiny20 Datasheet – 8-Bit AVR Microcontroller

Part Number : ATtiny20

Function : 8-bit AVR Microcontroller with 2K Bytes In-System Programmable Flash

Package : 12-ball(WLCSP), 14-lead(SOIC, TSSOP), 15-ball(UFBGA), 20-pad(VQFN) Pin type

Manufacturers : Atmel Corporation ( ATmel -> Microchip )

Image :


Description :

ATtiny20 is a low-power CMOS 8-bit microcontroller based on the compact AVR enhanced RISC architecture. By executing powerful instructions in a single clock cycle, the ATtiny20 achieves throughputs approaching 1 MIPS per MHz allowing the system designer to optimize power consumption versus processing speed.

The AVR core combines a rich instruction set with 16 general purpose working registers and system registers. All registers are directly connected to the Arithmetic Logic Unit (ALU), allowing two independent registers to be accessed in one single instruction executed in one clock cycle. The resulting architecture is compact and code efficient while achieving throughputs up to ten times faster than conventional CISC microcontrollers.



1. 2K bytes of in-system programmable Flash
2. 128 bytes of SRAM
3. Twelve general purpose I/O lines
4. 16 general purpose working registers
5. An 8-bit Timer/Counter with two PWM channels
6. A 16-bit Timer/Counter with two PWM channels
7. Internal and external interrupts
8. An eight-channel, 10-bit ADC
9. A programmable Watchdog Timer with internal oscillator
10. A slave two-wire interface
11. A master/slave serial peripheral interface
12. An internal calibrated oscillator
13. Four software selectable power saving modes

Official Homepage :

Ordering Code :

ATtiny20-UUR, ATtiny20-SSU, ATtiny20-SSUR, ATtiny20-XU, ATtiny20-XUR, ATtiny20-CCU

ATtiny20 PDF Datasheet Download


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AT42QT1040 Datasheet – Qtouch Sensor IC – QT1040 – ATMEL

This post describes for the semiconductor AT42QT1040, QT1040.

The function of this semiconductor is Four-key QTouch Touch Sensor IC.

The package is 20-pin 3 x 3 mm VQFN RoHS compliant.

The manufacturer of this part is ATMEL.

See the preview image and the QT1040 Datasheet PDF file for more information.

Image QT1040 datasheet

The AT42QT1040 (QT1040) is a digital burst mode charge-transfer (QT™) capacitive sensor driver designed for touch-key applications. The device can sense from one to four keys; one to three keys can be disabled by not installing their respective sense capacitors. Any of the four channels can be disabled in this way. The device includes all signal processing functions necessary to provide stable sensing under a wide variety of changing conditions, and the outputs are fully de-bounced. Only a few external parts are required for operation. The QT1040 modulates its bursts in a spread-spectrum fashion in order to heavily suppress the effects of external noise, and to suppress RF emissions.



AT42QT1040 datasheet pdf



1. Number of QTouch® Keys : Up to four
2. Discrete Outputs : Four discrete outputs indicating individual key touch
3. Technology : Patented spread-spectrum charge-transfer (direct mode)
4. Electrode Design : Simple self-capacitance style (refer to the Touch Sensors Design Guide)
5. Electrode Materials : Etched copper, silver, carbon, Indium Tin Oxide (ITO)
6. Electrode Substrates : PCB, FPCB, plastic films, glass

AT42QT1040 Datasheet