ATtiny406
AVR Microcontroller with Core Independent Peripherals
and picoPower Technology
Introduction
The ATtiny406 microcontrollers are using the high-performance, low-power AVR RISC architecture, and
are capable of running at up to 20 MHz, with up to 4 KB Flash, 256 bytes of SRAM, and 128 bytes of
EEPROM in a 20-pin package.The series uses the latest technologies with a flexible and low-power
architecture including Event System and SleepWalking, accurate analog features, and advanced
peripherals.
Features
CPU:
AVR 8-bit CPU
Running at up to 20 MHz
Single cycle I/O access
Two-level interrupt controller
Two-cycle hardware multiplier
Memories:
4 KB In-system self-programmable Flash memory
128B EEPROM
256B SRAM
Write/Erase Cycles: 10,000 Flash/100,000 EEPROM
Data Retention: 20 Years at 85C
System:
Power-on Reset (POR)
Brown-out Detection (BOD)
Clock Options:
16/20 MHz Low-Power Internal RC Oscillator with:
3% Accuracy over full temperature and voltage range
2% Drift over limited temperature and 1.8 ... 3.6V voltage range
32.768 kHz Ultra Low-Power (ULP) Internal RC Oscillator with 10% Accuracy, 2%
Calibration Step Size
External Clock Input
Single Pin Unified Program Debug Interface (UPDI)
Three Sleep Modes:
Idle with all peripherals running and mode for immediate wake-up time
DS40001976A-page 1
Datasheet Preliminary
2018 Microchip Technology Inc. ATtiny406
Standby
Configurable operation of selected peripherals
SleepWalking peripherals
Power-down with wake-up functionality
Peripherals:
3-channel Event System
One 16-bit Timer/Counter Type A with Dedicated Period Register, Three Compare Channels
(TCA)
One 16-bit Timer/Counter Type B with Input Capture (TCB)
One 16-bit Real-Time Counter (RTC) running from Internal RC Oscillator
One USART with fractional Baud Rate Generator, Auto-baud, and Start-of-frame Detection
Master/Slave Serial Peripheral Interface (SPI)
Master/Slave TWI with Dual Address Match
Standard mode (Sm, 100 kHz)
Fast mode (Fm, 400 kHz)
Fast mode Plus (Fm+, 1 MHz)
Configurable Custom Logic (CCL) with Two Programmable Look-up Tables (LUT)
Analog Comparator (AC)
10-bit 115 ksps Analog-to-Digital Converter (ADC)
Five selectable internal voltage references: 0.55V, 1.1V, 1.5V, 2.5V, and 4.3V
Automated CRC memory scan
Watchdog Timer (WDT) with Window mode, with separate on-chip oscillator
External interrupt on all general purpose pins
I/O and Packages:
18 Programmable I/O lines
20-pin VQFN and SOIC300
Temperature Ranges:
-40C to 105C
-40C to 125C Temperature graded device options available
Speed Grades:
0-5 MHz @ 1.8V 5.5V
0-10 MHz @ 2.7V 5.5V
0-20 MHz @ 4.5V 5.5V
DS40001976A-page 2
Datasheet Preliminary
2018 Microchip Technology Inc.