ATTINY3216/3217

tinyAVR® 1-series

Overview

Part: ATtiny3216/3217 Automotive (tinyAVR® 1-series)

Type: Microcontroller

Key Specs:

  • CPU Speed: up to 16 MHz
  • Flash Memory: 32 KB
  • SRAM: 2 KB
  • EEPROM: 256 bytes
  • I/O Lines: Up to 22 programmable
  • Operating Temperature: -40°C to 105°C, -40°C to 125°C

Features:

  • AVR® CPU with hardware multiplier
  • Single-cycle I/O access
  • Two-level interrupt controller
  • 10,000 Flash write/erase cycles
  • 100,000 EEPROM write/erase cycles
  • 40 years data retention at 55°C
  • Power-on Reset (POR)
  • Brown-out Detector (BOD)
  • Multiple clock options including 16 MHz internal RC oscillator and 32.768 kHz ULP internal RC oscillator
  • Single-Pin Unified Program and Debug Interface (UPDI)
  • Three sleep modes: Idle, Standby, Power-Down
  • One 16-bit Timer/Counter type A (TCA) with dedicated period register and three compare channels
  • Two 16-bit Timer/Counter type B (TCB) with input capture

Features

  • CPU

    • AVR® CPU
    • Running at up to 16 MHz
    • Single-cycle I/O access
    • Two-level interrupt controller
    • Two-cycle hardware multiplier

  • Memories

    • 32 KB In-system self-programmable Flash memory
    • 256 bytes EEPROM
    • 2 KB SRAM
    • Write/erase endurance:
      • Flash 10,000 cycles
      • EEPROM 100,000 cycles
    • Data retention:
      • 40 years at 55°C

  • System

    • Power-on Reset (POR)
    • Brown-out Detector (BOD)
    • Clock options:
      • 16 MHz low-power internal RC oscillator
      • 32.768 kHz Ultra Low-Power (ULP) internal RC oscillator
      • 32.768 kHz external crystal oscillator
      • External clock input
    • Single-Pin Unified Program and Debug Interface (UPDI)
    • Three sleep modes:
      • Idle with all peripherals running for immediate wake-up
      • Standby
        • Configurable operation of selected peripherals
      • Power-Down with full data retention

  • Peripherals

  • One 16-bit Timer/Counter type A (TCA) with a dedicated period register and three compare channels

  • Two 16-bit Timer/Counter type B (TCB) with input capture

  • One 12-bit Timer/Counter type D (TCD) optimized for control applications

  • One 16-bit Real-Time Counter (RTC) running from an external crystal, external clock, or internal RC oscillator

  • Watchdog Timer (WDT) with Window mode, with a separate on-chip oscillator

  • One USART with fractional baud rate generator, auto-baud, and start-of-frame detection

  • One master/slave Serial Peripheral Interface (SPI)

  • One Two-Wire Interface (TWI) with dual address match

    • Philips I2C compatible
    • Standard mode (Sm, 100 kHz)
    • Fast mode (Fm, 400 kHz)
    • Fast mode plus (Fm+, 1 MHz)

  • Three Analog Comparators (AC) with a low propagation delay

  • Two 10-bit 115 ksps Analog-to-Digital Converters (ADCs)

  • Three 8-bit Digital-to-Analog Converters (DACs) with one external channel

  • Multiple voltage references (VREF):

    • 0.55V
    • 1.1V
    • 1.5V
    • 2.5V
    • 4.3V

  • Event System (EVSYS) for CPU independent and predictable inter-peripheral signaling

  • Configurable Custom Logic (CCL) with two programmable look-up tables

  • Automated CRC memory scan

  • Peripheral Touch Controller (PTC)

    • Capacitive touch buttons, sliders, wheels and 2D surfaces
    • Wake-up on touch
    • Driven shield for improved moisture and noise handling performance
    • Up to 14 self-capacitance channels
    • Up to 49 mutual capacitance channels

  • External interrupt on all general purpose pins

  • I/O and Packages:

    • Up to 22 programmable I/O lines
    • 20-pin SOIC300
    • 24-pin VQFN 4x4 mm with wettable flanks

  • Temperature Ranges:

    • -40°C to 105°C
    • -40°C to 125°C

  • Speed Grades:

    • 0-8 MHz @ 2.7V 5.5V
    • 0-16 MHz @ 4.5V 5.5V

  • Introduction1

  • Features 1

    1. Silicon Errata and Data Sheet Clarification Document10
    1. tinyAVR® 1-series Overview11

  • 2.1. Configuration Summary11

    1. Block Diagram13
    1. Pinout14

  • 4.1. 20-Pin SOIC 14

  • 4.2. 24-Pin VQFN15

    1. I/O Multiplexing and Considerations 16

  • 5.1. Multiplexed Signals 16

    1. Automotive Quality Grade 17
    1. Memories 18

  • 7.1. Overview 18

  • 7.2. Memory Map 19

  • 7.3. In-System Reprogrammable Flash Program Memory19

  • 7.4. SRAM Data Memory 20

  • 7.5. EEPROM Data Memory 20

  • 7.6. User Row20

  • 7.7.
    7.8. Signature Bytes20
    I/O Memory21

  • 7.9. Memory Section Access from CPU and UPDI on Locked Device23

  • 7.10. Configuration and User Fuses (FUSE)24

    1. Peripherals and Architecture40

  • 8.1. Peripheral Address Map40

  • 8.2. Interrupt Vector Mapping41

  • 8.3. System Configuration (SYSCFG)42

    1. AVR® CPU 45

  • 9.1. Features 45

  • 9.2. Overview 45

  • 9.3. Architecture 45

  • 9.4. Arithmetic Logic Unit (ALU)47

  • 9.5. Functional Description47

  • 9.6. Register Summary52

  • 9.7. Register Description52

    1. NVMCTRL - Nonvolatile Memory Controller 56

  • 10.1. Features 56

  • 10.2. Overview 56

  • 10.3. Functional Description57

  • 10.4. Register Summary62

  • 10.5. Register Description62

    1. CLKCTRL - Clock Controller 70

  • 11.1. Features 70

  • 11.2. Overview 70

  • 11.3. Functional Description72

  • 11.4. Register Summary76

  • 11.5. Register Description76

    1. SLPCTRL - Sleep Controller 86

  • 12.1. Features 86

  • 12.2. Overview 86

  • 12.3. Functional Description86

  • 12.4. Register Summary89

  • 12.5. Register Description89

    1. RSTCTRL - Reset Controller 91

  • 13.1. Features 91

  • 13.2. Overview 91

  • 13.3. Functional Description92

  • 13.4.
    13.5. Register Summary96
    Register Description96

    1. CPUINT - CPU Interrupt Controller 99

  • 14.1. Features 99

  • 14.2. Overview 99

  • 14.3. Functional Description100

  • 14.4. Register Summary 105

  • 14.5. Register Description105

    1. EVSYS - Event System 110

  • 15.1. Features 110

  • 15.2. Overview110

  • 15.3. Functional Description112

  • 15.4. Register Summary114

  • 15.5. Register Description 114

    1. PORTMUX - Port Multiplexer 121

  • 16.1. Overview 121

  • 16.2. Register Summary122

  • 16.3. Register Description122

    1. PORT - I/O Pin Configuration127

  • 17.1. Features 127

  • 17.2. Overview 127

  • 17.3. Functional Description129

  • 17.6.
    Register Summary - VPORTx 144

  • 17.7.
    Register Description - VPORTx144

    1. BOD - Brown-out Detector 149

  • 18.1.
    Features 149

  • 18.2.
    Overview 149

  • 18.3.
    Functional Description150

  • 18.4.
    Register Summary152

  • 18.5.
    Register Description152

    1. VREF - Voltage Reference159

  • 19.1.
    Features 159

  • 19.2.
    Overview 159

  • 19.3.
    Functional Description159

  • 19.4.
    Register Summary 160

  • 19.5.
    Register Description160

    1. WDT - Watchdog Timer165

  • 20.1.
    Features 165

  • 20.2.
    Overview 165

  • 20.3.
    Functional Description166

  • 20.4.
    Register Summary - WDT 169

  • 20.5.
    Register Description169

    1. TCA - 16-bit Timer/Counter Type A172

  • 21.1.
    Features 172

  • 21.2.
    Overview 172

  • 21.3.
    Functional Description174

  • 21.4.
    Register Summary - Normal Mode184

  • 21.5.
    Register Description - Normal Mode 184

  • 21.6.
    Register Summary - Split Mode 203

  • 21.7.
    Register Description - Split Mode203

    1. TCB - 16-bit Timer/Counter Type B219

  • 22.1.
    Features 219

  • 22.2.
    Overview 219

  • 22.3.
    Functional Description221

  • 22.4.
    Register Summary229
    22.5.
    Register Description229

    1. TCD - 12-Bit Timer/Counter Type D240

  • 23.1.
    Features 240

  • 23.2.
    Overview 240

  • 23.3.
    Functional Description242

  • 23.4.
    Register Summary265
    23.5.
    Register Description265

  • 24.1.
    Features 290

  • 24.2.
    Overview 290

  • 24.3.
    Clocks291

  • 24.4.
    RTC Functional Description 291

  • 24.5.
    PIT Functional Description 292

  • 24.6.
    Events 293

  • 24.7.
    Interrupts 294

  • 24.8.
    Sleep Mode Operation 295

  • 24.9.
    Synchronization295

  • 24.10. Debug Operation295

  • 24.11. Register Summary296

  • 24.12. Register Description296

    1. USART - Universal Synchronous and Asynchronous Receiver and Transmitter312

  • 25.1.
    Features 312

  • 25.2.
    Overview 312

  • 25.3.
    Functional Description313

  • 25.4.
    Register Summary328

  • 25.5.
    Register Description328

    1. SPI - Serial Peripheral Interface345

  • 26.1.
    Features 345

  • 26.2.
    Overview 345

  • 26.3.
    Functional Description346

  • 26.4.
    Register Summary353

  • 26.5.
    Register Description353

    1. TWI - Two-Wire Interface 360

  • 27.1.
    Features 360

  • 27.2.
    Overview 360

  • 27.3.
    Functional Description361

  • 27.4.
    Register Summary372

  • 27.5.
    Register Description372

    1. CRCSCAN - Cyclic Redundancy Check Memory Scan 389

  • 28.1.
    Features 389

  • 28.2.
    Overview 389

  • 28.3.
    Functional Description390

  • 28.4.
    Register Summary - CRCSCAN393

  • 28.5.
    Register Description393

    1. CCL - Configurable Custom Logic 397

  • 29.1.
    Features 397

  • 29.2.
    Overview 397

  • 29.3.
    Functional Description399

  • 29.4.
    Register Summary407

  • 29.5.
    Register Description407

    1. AC - Analog Comparator415

  • 30.1. Features 415

  • 30.2. Overview 415

  • 30.3. Functional Description417

  • 30.4. Register Summary419

  • 30.5. Register Description419

    1. ADC - Analog-to-Digital Converter 424

  • 31.1. Features 424

  • 31.2. Overview 424

  • 31.3. Functional Description427

  • 31.4. Register Summary - ADCn434

  • 31.5. Register Description434

    1. DAC - Digital-to-Analog Converter 452

  • 32.1. Features 452

  • 32.2. Overview 452

  • 32.3. Functional Description453

  • 32.4. Register Summary455

  • 32.5. Register Description455

    1. PTC - Peripheral Touch Controller 458

  • 33.1. Overview 458

  • 33.2. Features 458

  • 33.3. Block Diagram459

  • 33.4. Signal Description 459

  • 33.5. System Dependencies 460

  • 33.6. Functional Description461

    1. UPDI - Unified Program and Debug Interface462

  • 34.1. Features 462

  • 34.2. Overview 462

  • 34.3. Functional Description464

  • 34.4. Register Summary485

  • 34.5. Register Description485

    1. Instruction Set Summary496
    1. Conventions 497

  • 36.1. Numerical Notation497

  • 36.2. Memory Size and Type497

  • 36.3. Frequency and Time497

  • 36.4. Registers and Bits 498

  • 36.5. ADC Parameter Definitions 499

    1. Electrical Characteristics502

  • 37.1. Disclaimer502

  • 37.2. Absolute Maximum Ratings 502

  • 37.3. General Operating Ratings 503

  • 37.4.
    37.5. Power Consumption503
    Wake-Up Time504

  • 37.6. Peripherals Power Consumption505

  • 37.7. BOD and POR Characteristics506

  • 37.8. External Reset Characteristics507

  • 37.9. Oscillators and Clocks507

  • 37.10. I/O Pin Characteristics 508

  • 37.11. TCD509

  • 37.12. USART510

  • 37.13. SPI511

  • 37.14. TWI512

  • 37.15. VREF515

  • 37.16. ADC516

  • 37.17. DAC518

  • 37.18. AC 519

  • 37.19. PTC520

  • 37.20. UPDI Timing520

  • 37.21. Programming Time521

    1. Typical Characteristics 523

  • 38.1. Power Consumption523

  • 38.2. GPIO 530

  • 38.3. VREF Characteristics536

  • 38.4. BOD Characteristics538

  • 38.5. ADC Characteristics540

  • 38.6. AC Characteristics550

  • 38.7. OSC20M Characteristics554

  • 38.8. OSCULP32K Characteristics 556

  • 38.9. TWI SDA Hold Timing 557

    1. Ordering Information 558

  • 39.1. Product Information558

  • 39.2. Product Identification System558

    1. Package Drawings 559

  • 40.1. Online Package Drawings559

  • 40.2. 20-Pin SOIC 560

  • 40.3. 24-Pin VQFN Wettable Flanks 563

  • 40.4. Thermal Considerations 566

    1. Errata 567

  • 41.1. Errata - ATtiny3216/3217 Automotive 567

    1. Data Sheet Revision History 568

  • 42.1. Rev. A - 05/2020568

  • The Microchip Website569

  • Product Change Notification Service569

  • Customer Support 569

  • Microchip Devices Code Protection Feature570

  • Legal Notice 570

  • Trademarks 570

  • Quality Management System 571

  • Worldwide Sales and Service572

Pin Configuration

This bit field selects the Reset/UPDI pin configuration. Value Description 0x0 GPIO 0x1 UPDI 0x2 RESET Other Reserved

Note: When configuring the RESET pin as GPIO, there is a potential conflict between the GPIO actively driving the output, and a high-voltage UPDI enable sequence initiation. To avoid this, the GPIO output driver is disabled for 768 OSC32K cycles after a System Reset. Enable any interrupts for this pin only after this period.

Related Variants

The following components are covered by the same datasheet.

Part NumberManufacturerPackage
ATTINY3216——
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