ATXMEGA16D4-AU - 32MHz 16KB Flash MCU | Microchip Technology
N.º de pieza: ATXMEGA16D4-AU ✓ ActivoATXMEGA16D4-AU Descripción general
An AVR XMEGA microcontroller is a low-power, high-performance member of the AVR embedded-control family. It combines an enhanced RISC core, programmable event system, multi-level interrupt controller, timers, communication peripherals, and mixed-signal resources. This hierarchy places the device between general-purpose 8/16-bit microcontrollers and larger mixed-signal system controllers, making it useful when deterministic event handling and peripheral integration matter more than large embedded flash capacity.
Key features include a 32 MHz operating clock, 16 KB of ISP flash with a 4 KB boot-code section and read-while-write capability, 1 KB of EEPROM, 2 KB of SRAM, and 34 I/O pins. The four-channel event system can directly route signals between peripherals, reducing processor intervention. Two USARTs, four flexible 16-bit timer/counters with PWM capability, and a 16-bit real-time counter support communication, motor control, and periodic timekeeping.
The ATxmega16D4 peripheral set is organized around the XMEGA event system. Peripherals can be connected to event channels rather than relying exclusively on interrupt-driven software polling. The programmable multi-level interrupt controller supports prioritized event handling, while the timer/counter compare and PWM blocks support waveform generation and time-based control. Two USARTs allow simultaneous communication links, although complete baud-rate, electrical-interface, and peripheral feature details should be confirmed in the manufacturer datasheet before assigning board-level functions.
Typical uses include industrial control modules, compact sensor nodes, motor and valve controllers, data-acquisition front ends, and communication bridges. The 34 available I/O lines provide useful flexibility for digital interfaces and discrete control functions. For designs requiring larger program storage, a 128 KB-flash XMEGA may be preferable, while designs needing only 16 KB benefit from the ATXMEGA16D4-AU's more compact memory footprint.
PCB planning should reserve decoupling close to every supply pin and confirm the exact exposed-pad or thermal requirements associated with the selected TQFP variant. Use the manufacturer pin-description table when assigning tracks and programming functions. Boot code and application memory are distinct regions, so firmware-update logic should preserve the intended boot section and avoid assuming that all 16 KB is available to application code.
This product page combines the manufacturer's device characteristics, package and memory details, drop-in replacement findings, comparison parameters, and practical design guidance. It is intended to help engineers evaluate the ATXMEGA16D4-AU for embedded-control, timing, serial-communication, and mixed-signal applications.
Alternativas directas para ATXMEGA16D4-AU — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con ATXMEGA16D4-AU (mismo factor de forma y huella) — difiere en Event System Channels, Package, ADC, Operating Temperature, Program Memory (Flash).
ATXMEGA16A4U-AU
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Ver hoja de datos →ATXMEGA16D4-AU Valores máximos y características eléctricas
| Product Type | 8/16-bit AVR XMEGA microcontroller |
| Maximum Clock Speed | 32 MHz |
| Flash Memory | 16 KB |
| Boot Code Section | 4 KB |
| EEPROM Memory | 1 KB |
| SRAM | 2 KB |
| General-Purpose I/O Lines | 34 |
| Event System Channels | 4 channels |
| USART Count | 2 |
| Timer/Counter Count | 4 |
| Timer/Counter Resolution | 16-bit |
| Real-Time Counter Resolution | 16-bit |
| Supply Voltage Range | 2.7 V to 3.6 V |
| Additional Supply Voltage Points | 1.8 V, 2.5 V, and 3.3 V |
| Encapsulado | 44-pin TQFP, 10 mm x 10 mm |
| Tipo de montaje | Surface mount |
| Program Memory Type | ISP flash with read-while-write capability |
| Interrupt Controller | Programmable multi-level interrupt controller |
| Estado del ciclo de vida | Active |
Guía de configuración de pines de ATXMEGA16D4-AU 44-pin tqfp, 10 mm x 10 mm
Configuración de pines para ATXMEGA16D4-AU (encapsulado 44-pin tqfp, 10 mm x 10 mm). Este CI digital incluye GPIO, interfaces de comunicación (UART, SPI, I2C) y pines de alimentación. Consulte la hoja de datos del fabricante para conocer las funciones alternativas de los pines y las opciones de configuración. Esencial para el diseño de sistemas embebidos y el diseño de PCB.
No hay datos detallados de patillaje disponibles para ATXMEGA16D4-AU.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
ATXMEGA16D4-AU es adecuado para 6 aplicacións: Industrial Control Modules, Motor and Valve Controllers, Serial Communication Bridges, Precision Data Acquisition, Sensor and IoT Nodes, Battery-Powered Portable Equipment.
Industrial Control Modules
The ATXMEGA16D4-AU fits compact industrial-control modules that need deterministic digital I/O, timing, and serial coordination. Its 32 MHz AVR core provides processing headroom, while 34 general-purpose I/O lines support sensors, status indicators, interlocks, and discrete actuators. The four 16-bit timer/counters with compare and PWM functions simplify periodic measurement and actuator timing, and the programmable multi-level interrupt controller helps prioritize control events. The 16 KB flash, 1 KB EEPROM, and 2 KB SRAM are appropriate for compact control firmware rather than large local data logging. Use isolated I/O and appropriately rated interface circuits when connected to industrial voltage levels, and verify the device temperature range against the enclosure conditions before production release.
Recomendado
Motor and Valve Controllers
The ATXMEGA16D4-AU is well suited to small brushless-motor, solenoid, stepper, and valve-control modules where accurate timing and PWM generation are central. Its four flexible 16-bit timer/counters provide compare channels and PWM outputs, while the four-channel event system can coordinate timing actions between peripherals with less processor intervention than routine interrupt polling. At 32 MHz, the controller supports responsive supervisory logic around the timing hardware. The device should drive power stages through suitable gate drivers and add overcurrent, undervoltage, and fault-detection circuits appropriate to the load. Firmware should include a defined disabled state at startup so that a reset cannot unexpectedly energize external actuators.
Recomendado
Serial Communication Bridges
The ATXMEGA16D4-AU can serve as a protocol-conversion or data-forwarding node because it combines two USARTs with 34 I/O lines and a 32 MHz processor. One USART can manage a local sensor or service interface while the other handles a field-facing link, provided its baud-rate and framing capabilities match the system requirement. The four-channel event system can support direct peripheral coordination, and EEPROM preserves configuration parameters across power cycles. RS-232, RS-485, isolated UART, or other physical layers require external interface components. Validate electrical levels, isolation direction, termination, ESD protection, and protocol timing on the assembled board rather than treating the MCU USART pins as complete communication ports.
Recomendado
Precision Data Acquisition
The ATXMEGA16D4-AU can act as the control element in compact data-acquisition and measurement systems that combine sensor conditioning, periodic sampling, and local processing. Its four 16-bit timer/counters support accurate sampling intervals and elapsed-time measurement, while the event system permits direct routing between suitable peripherals. The 34 I/O lines leave room for digital sensor interfaces, status signals, and external data-capture control. The 16 KB flash and 2 KB SRAM favor streamed or bounded measurements rather than large onboard datasets, while 1 KB of EEPROM can hold calibration identifiers and operating parameters. Analog accuracy ultimately depends on the external front end, reference strategy, grounding, and layout isolation; the MCU's digital timing capability does not by itself determine measurement precision.
Recomendado
Sensor and IoT Nodes
The ATXMEGA16D4-AU suits compact sensor nodes that periodically sample inputs, apply filtering, and transmit results through a serial interface. Its low-power-oriented AVR XMEGA architecture combines a 32 MHz core with a four-channel event system, four timer/counters, two USARTs, and a programmable multi-level interrupt controller. This allows measurement schedules and communication activities to be coordinated while retaining 34 I/O lines for sensors and local status functions. The 2 KB SRAM supports short working buffers, and the 4 KB boot section can support a separate boot workflow. For battery-operated equipment, calculate the complete duty-cycle energy budget using the manufacturer's active and sleep-current figures, regulator quiescent current, and radio activity rather than judging low-power performance from clock speed alone.
Recomendado
Battery-Powered Portable Equipment
The ATXMEGA16D4-AU is suitable for portable instruments and battery-operated accessories that require a compact controller with several timers, dual serial interfaces, and moderate firmware storage. Its 2.7 V to 3.6 V operating range supports integration with common low-voltage power systems, while 34 I/O lines can serve displays, buttons, sensors, and control outputs. The 16 KB flash and 2 KB SRAM are appropriate for compact menus, calibration logic, and short data buffers rather than multimedia workloads. Power design should account for voltage-drop behavior at the highest clock and load, regulator efficiency over the discharge curve, and wake-up timing. Use the manufacturer power-consumption tables and a measured prototype profile before setting the final battery-life requirement.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para ATXMEGA16D4-AU — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | ATXMEGA16A4U-AU | ATXMEGA64A4U-AU | ATXMEGA128A4U-AN |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Maximum Clock Speed | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Flash Memory | 16 KB | 20 KB | 64 KB | 128 KB |
| Timer/Counter Count | 4 | 4 | 4 | 4 |
Diferenciadores clave
- More compact program memory than the higher-flash ATXMEGA16A4U-AU option (frente a ATXMEGA16A4U-AU)
- Two USARTs support dual-serial-interface designs (frente a ATXMEGA16A4U-AU)
- Direct peripheral coordination through a four-channel event system (frente a ATXMEGA16A4U-AU)
Notas de diseño
Place the required input and output decoupling capacitors immediately adjacent to the corresponding power and ground pins, following the Microchip ATxmega16D4 datasheet layout guidance. Keep high-current return paths away from sensitive analog and communication traces. The ATXMEGA16D4-AU is a 44-pin TQFP with a 10 mm by 10 mm body, so verify the selected land pattern, pin-1 orientation, courtyard, and assembly clearances against the exact package drawing before generating manufacturing data.
Use the pin-description table in the manufacturer datasheet for all 44 assignments. The confirmed 44-pin count does not establish individual signal names, programming pins, reset behavior, or analog functions. Before release, cross-check programming and debug access, external clock requirements, reset strategy, unused inputs, and every ground connection against the exact ATXMEGA16D4-AU documentation.
Estimated: no power-consumption figure is calculated because the exact operating mode, clock source, load, voltage, and measured current were not established. Evaluate the 2.7 V to 3.6 V supply range with the regulator's worst-case dropout, startup behavior, and peak processing demand. For portable systems, measure current during active operation, idle operation, and the selected sleep mode, then include regulator and external-circuit consumption in the battery budget.
Do not assume that all 16 KB of flash is available to application code: the family documentation identifies a 4 KB boot-code section. Preserve the intended boot configuration, update routine, and vector-table assumptions when changing firmware. Also avoid assuming that a same-family replacement is electrically interchangeable without reviewing its memory map, peripheral set, package pins, clock behavior, and programming procedure.
Route clock-sensitive signals away from switching nodes and noisy power-conversion stages, and provide a continuous return path beneath high-speed or clock-related traces where practical. The XMEGA event system can reduce processor latency, but it does not eliminate physical signal-integrity requirements. Validate external communications, timing-sensitive inputs, and any high-impedance analog connections with appropriate probes and loading on the assembled PCB.
Información de cumplimiento
No definitive device-level compliance values were identified for the exact ATXMEGA16D4-AU ordering code. Request the current manufacturer compliance documentation before using the part in regulated production designs.