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AVR64DU28/32 Complete Data Sheet
Introduction
Features
AVR® DU Family Overview
1 Memory Overview
2 Peripheral Overview
Security Concept
1 Block Diagram
2 Pinout
2.1 28-Pin SPDIP and SSOP
2.2 28-Pin VQFN
2.3 32-Pin TQFP and VQFN
3 I/O Multiplexing and Considerations
3.1 I/O Multiplexing
4 Conventions
4.1 Numerical Notation
4.2 Memory Size and Type
4.3 Frequency and Time
4.4 Registers and Bits
4.5 ADC Parameter Definitions
5 Hardware Guidelines
5.1 General Guidelines
5.2 Connection for Power Supply
5.3 Connection for RESET
5.4 Connection for UPDI Programming
5.5 Connecting External Crystal Oscillators
5.6 Connection for External Voltage Reference
6 Power Supply
6.1 Power Domains
6.2 Voltage Regulator
6.3 Power-Up
6.4 USB Power Supply Configurations
7 AVR® CPU
7.1 Features
7.2 Overview
7.3 Architecture
7.4 Functional Description
7.5 Register Summary
7.6 Register Description
8 Memories
8.1 Overview
8.2 Memory Map
8.3 In-System Reprogrammable Flash Program Memory
8.4 Program and Debug Interface Disable (PDID)
8.5 SRAM Data Memory
8.6 EEPROM Data Memory
8.7 SIGROW - Signature Row
8.8 BOOTROW - Boot Row
8.9 USERROW - User Row
8.10 FUSE - Configuration and User Fuses
8.11 LOCK - Memory Sections Access Protection
8.12 I/O Memory
9 Peripherals and Architecture
9.1 Peripheral Address Map
9.2 Interrupt Vector Mapping
9.3 SYSCFG - System Configuration
10 GPR - General Purpose Registers
10.1 GPR
11 NVMCTRL - Nonvolatile Memory Controller
11.1 Features
11.2 Overview
11.3 Functional Description
11.4 Register Summary
11.5 Register Description
12 CLKCTRL - Clock Controller
12.1 Features
12.2 Overview
12.3 Functional Description
12.4 CLKCTRL
12.5 Main Clock Control A
Main Clock Control A
12.6 Main Clock Control B
Main Clock Control B
12.7 Main Clock Control C
Main Clock Control C
12.8 Main Clock Interrupt Control
Main Clock Interrupt Control
12.9 Main Clock Interrupt Flags
Main Clock Interrupt Flags
12.10 Main Clock Status
Main Clock Status
12.11 Main Clock Timebase
Main Clock Timebase
12.12 Internal High-Frequency Oscillator Control A
Internal High-Frequency Oscillator Control A
12.13 Internal High-Frequency Oscillator Frequency Tune
Internal High-Frequency Oscillator Frequency Tune
12.14 Internal High-Frequency Oscillator Status
Internal High-Frequency Oscillator Status
12.15 Internal 32.768 kHz Oscillator Control A
Internal 32.768 kHz Oscillator Control A
12.16 External 32.768 kHz Crystal Oscillator Control A
External 32.768 kHz Crystal Oscillator Control A
12.17 External High-Frequency Oscillator Control A
External High-Frequency Oscillator Control A
12.18 USB PLL Status
USB PLL Status
13 SLPCTRL - Sleep Controller
13.1 Features
13.2 Overview
13.3 Functional Description
13.4 Register Summary
13.5 Register Description
14 RSTCTRL - Reset Controller
14.1 Features
14.2 Overview
14.3 Functional Description
14.4 Register Summary
14.5 Register Description
15 CPUINT - CPU Interrupt Controller
15.1 Features
15.2 Overview
15.3 Functional Description
15.4 Register Summary
15.5 Register Description
16 EVSYS - Event System
16.1 Features
16.2 Overview
16.3 Functional Description
16.4 Register Summary
16.5 Register Description
17 PORTMUX - Port Multiplexer
17.1 Overview
17.2 PORTMUX
18 PORT - I/O Pin Configuration
18.1 Features
18.2 Overview
18.3 Functional Description
18.4 Register Summary
Port
18.5 Register Description - PORTx
18.6 Register Summary - VPORTx
18.7 Register Description - VPORTx
19 BOD - Brown-out Detector
19.1 Features
19.2 Overview
19.3 Functional Description
19.4 BOD
20 VREF - Voltage Reference
20.1 Features
20.2 Overview
20.3 Functional Description
20.4 VREF
21 WDT - Watchdog Timer
21.1 Features
21.2 Overview
21.3 Functional Description
21.4 Register Summary
21.5 Register Description
22 RTC - Real-Time Counter
22.1 Features
22.2 Overview
22.3 Clocks
22.4 RTC Functional Description
22.5 PIT Functional Description
22.6 Crystal Error Correction
22.7 Events
22.8 Interrupts
22.9 Sleep Mode Operation
22.10 Synchronization
22.11 Debug Operation
22.12 Register Summary
22.13 Register Description
23 TCA - 16-bit Timer/Counter Type A
23.1 Features
23.2 Overview
23.3 Functional Description
23.4 TCA
16-bit single mode
23.5 TCA
16-bit split mode
24 TCB - 16-Bit Timer/Counter Type B
24.1 Features
24.2 Overview
24.3 Functional Description
24.4 Register Summary
24.5 Register Description
25 USART - Universal Synchronous and Asynchronous Receiver and Transmitter
25.1 Features
25.2 Overview
25.3 Functional Description
25.4 USART
26 SPI - Serial Peripheral Interface
26.1 Features
26.2 Overview
26.3 Functional Description
26.4 Register Summary
26.5 Register Description
27 TWI - Two-Wire Interface
27.1 Features
27.2 Overview
27.3 Functional Description
27.4 Register Summary
27.5 Register Description
28 USB - Universal Serial Bus Device Controller
28.1 Features
28.2 Overview
28.3 Functional Description
28.4 USBn
Universal Serial Bus Device Controller
28.5 USB_EP_TABLE
Control, Interrupt, Bulk and Isochronous Endpoints
29 CRCSCAN - Cyclic Redundancy Check Memory Scan
29.1 Features
29.2 Overview
29.3 Functional Description
29.4 CRCSCAN
30 CCL - Configurable Custom Logic
30.1 Features
30.2 Overview
30.3 Functional Description
30.4 CCL
31 AC - Analog Comparator
31.1 Features
31.2 Overview
31.3 Functional Description
31.4 Register Summary
Analog Comparator
31.5 Register Description
32 ADC - Analog-to-Digital Converter
32.1 Features
32.2 Overview
32.3 Functional Description
32.4 ADC
33 UPDI - Unified Program and Debug Interface
33.1 Features
33.2 Overview
33.3 Functional Description
33.4 Register Summary
33.5 Register Description
34 Instruction Set Summary
35 Electrical Characteristics
35.1 Disclaimer
35.2 Absolute Maximum Ratings
35.3 Standard Operating Conditions
35.4 Supply Voltage
35.5 Power Consumption
35.6 Peripherals Power Consumption
35.7 I/O Pins
35.8 Memory Programming Specifications
35.9 Thermal Specifications
35.10 CLKCTRL
35.11 RSTCTRL
35.12 VREF
35.13 USART
35.14 SPI
35.15 TWI
35.16 ADC
35.17 AC
35.18 UPDI
36 Characteristics Graphs
36.1 Power Consumption
36.2 Peripheral Power Consumption
36.3 CLKCTRL
36.4 Reset Controller
36.5 I/O Pins
36.6 Voltage References
36.7 ADC - 10-Bit Single Ended Mode
36.8 Temperature Sensor
36.9 AC
36.10 DAC - 8-Bit Mode
37 Ordering Information
38 Package Drawings
38.1 Online Package Drawings
38.2 Package Marking Information
38.3 28-Pin SPDIP
38.4 28-Pin SSOP
38.5 28-Pin VQFN
38.6 32-Pin TQFP
38.7 32-Pin VQFN
39 Data Sheet Revision History
39.1 Rev.B - 06/2026
39.2 Rev.A - 02/2024
Microchip Information
Trademarks
Legal Notice
Microchip Devices Code Protection Feature

DS40002548B

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