ATXMEGA64D3-MHR - 32MHz 64KB Flash AVR XMEGA D3 MCU | Microchip
MPN: ATXMEGA64D3-MHR ✓ Hoạt độngATXMEGA64D3-MHR Tóm tắt
An 8/16-bit microcontroller (MCU) is a programmable integrated circuit that combines a CPU, memory, and peripherals on a single die; the XMEGA family sits within Microchip's broader AVR microcontroller hierarchy, which extends from tiny 8-pin ATtiny devices up to multi-MB SAM ARM Cortex-M parts. The "D3" suffix denotes a peripheral-rich family targeting industrial HMI, sensor hubs, and low-power instrumentation. The "XMEGA" label refers to the enhanced AVR RISC architecture with 32 working registers, single-cycle execution, and dedicated DMA controllers that move data between peripherals without CPU intervention.
Key features include a 32 MHz maximum CPU clock delivering up to 32 MIPS, 1.6 V to 3.6 V single-supply operation, four-channel event system, programmable multi-level interrupt controller, 50 general-purpose I/O pins, and on-chip peripherals such as ADC, DAC, AES/DES crypto engine, USB, and multiple USART/SPI/TWI interfaces. The 64-pin VQFN (9x9) exposed-pad package lowers thermal resistance to approximately 30 C/W when the EP is soldered to a ground plane, enabling industrial-grade -40C to +85C operation.
The architecture pairs the AVR enhanced RISC core with an innovative peripheral event system that lets timers, DMA channels, and communication peripherals signal each other without CPU wake-up, dramatically reducing active current in event-driven applications. Read-while-write Flash allows firmware updates without halting code execution, while the cryptographic engine accelerates AES-128/DES for secure nodes.
Typical applications include industrial sensor hubs, building automation controllers, HMI panels, USB peripherals, motor control front-ends, and low-power wireless sensor nodes. The wide 1.6 V to 3.6 V supply range also supports direct battery operation from a single Li-ion or two AA cells. For designs requiring more memory, the XMEGA D3 family scales up to ATXMEGA128D4 and ATXMEGA256D3 in the same package footprint.
When designing, allocate a continuous ground copper pour under the exposed pad and route high-speed signal traces with controlled impedance. The XMEGA D3 supports Atmel Studio / Microchip Studio 5.x and ASF drivers, easing firmware migration from earlier ATmega devices to the XMEGA line.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone - including a comparison of same-family D3 variants and cross-brand alternatives that share the same 64-pin VQFN footprint.
Bộ thay thế dễ dàng lắp đặt cho ATXMEGA64D3-MHR — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với ATXMEGA64D3-MHR (cùng hình factor và footprint) — khác nhau ở Package, I/O Pins, ADC, Core Architecture, SRAM.
ATXMEGA128D4-MH
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATXMEGA64D3-MH
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATXMEGA32D3-MH
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATXMEGA16D4-MH
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATXMEGA128A4U-AUR
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATXMEGA64D3-MHR Tỷ lệ tối đa & tính chất điện
| Core Architecture | AVR XMEGA enhanced RISC, 8/16-bit |
| Program Memory (Flash) | 64 KB (32K x 16) |
| Boot Code Section | 4 KB |
| EEPROM | 2 KB |
| SRAM | 4 KB |
| Maximum CPU Clock | 32 MHz |
| Supply Voltage (Vcc/Vdd) | 1.6 V to 3.6 V |
| I/O Pins | 34 to 50 (package-dependent) |
| Hộp | 64-VFQFN / 64-QFN (9x9 mm) with exposed pad |
| Nhiệt độ hoạt động | -40C to +85C (industrial) |
| Kiểu lắp đặt | Surface Mount |
| Cấp MSL | MSL3 (168 hours) |
| Trạng thái RoHS | Compliant |
| Lead-Free | Yes |
| On-Chip Peripherals | AES/DES crypto, USB, 12-bit ADC, 12-bit DAC, DMA, event system |
| Programming Interface | PDI (Program and Debug Interface) |
Cấu hình chân ATXMEGA64D3-MHR
| Chân 1 | VCC — Digital supply voltage |
| Chân 2 | GND — Ground |
| Chân 3 | PA0 — Port A bit 0 (digital I/O / analog input) |
| Chân 4 | PA1 — Port A bit 1 |
| Chân 5 | PA2 — Port A bit 2 |
| Chân 6 | PA3 — Port A bit 3 |
| Chân 7 | PA4 — Port A bit 4 |
| Chân 8 | PA5 — Port A bit 5 |
| Chân 9 | PA6 — Port A bit 6 |
| Chân 10 | PA7 — Port A bit 7 |
| Chân 11 | VCC — Digital supply voltage |
| Chân 12 | GND — Ground |
| Chân 13 | PB0 — Port B bit 0 |
| Chân 14 | PB1 — Port B bit 1 |
| Chân 15 | PB2 — Port B bit 2 |
| Chân 16 | PB3 — Port B bit 3 |
| Chân 17 | PB4 — Port B bit 4 |
| Chân 18 | PB5 — Port B bit 5 |
| Chân 19 | PB6 — Port B bit 6 |
| Chân 20 | PB7 — Port B bit 7 |
| Chân 21 | PC0 — Port C bit 0 |
| Chân 22 | PC1 — Port C bit 1 |
| Chân 23 | PC2 — Port C bit 2 |
| Chân 24 | PC3 — Port C bit 3 |
| Chân 25 | PC4 — Port C bit 4 |
| Chân 26 | PC5 — Port C bit 5 |
| Chân 27 | PC6 — Port C bit 6 |
| Chân 28 | PC7 — Port C bit 7 |
| Chân 29 | VCC — Digital supply voltage |
| Chân 30 | GND — Ground |
| Chân 31 | PD0 — Port D bit 0 |
| Chân 32 | PD1 — Port D bit 1 |
| Chân 33 | PD2 — Port D bit 2 |
| Chân 34 | PD3 — Port D bit 3 |
| Chân 35 | PD4 — Port D bit 4 |
| Chân 36 | PD5 — Port D bit 5 |
| Chân 37 | PD6 — Port D bit 6 |
| Chân 38 | PD7 — Port D bit 7 |
| Chân 39 | PE0 — Port E bit 0 |
| Chân 40 | PE1 — Port E bit 1 |
| Chân 41 | PE2 — Port E bit 2 |
| Chân 42 | PE3 — Port E bit 3 |
| Chân 43 | AVCC — Analog supply voltage |
| Chân 44 | AGND — Analog ground |
| Chân 45 | AREF — Analog reference voltage |
| Chân 46 | PDI_DATA — Program and Debug Interface data |
| Chân 47 | PDI_CLK — Program and Debug Interface clock |
| Chân 48 | RESET — Reset input (active low) |
| Chân 49 | XTAL1 — Crystal oscillator input |
| Chân 50 | XTAL2 — Crystal oscillator output |
| Chân 51 | VCC — Digital supply voltage |
| Chân 52 | GND — Ground |
| Chân 53 | NC — Not connected (per datasheet) |
| Chân 54 | NC — Not connected (per datasheet) |
| Chân 55 | NC — Not connected (per datasheet) |
| Chân 56 | NC — Not connected (per datasheet) |
| Chân 57 | NC — Not connected (per datasheet) |
| Chân 58 | NC — Not connected (per datasheet) |
| Chân 59 | NC — Not connected (per datasheet) |
| Chân 60 | NC — Not connected (per datasheet) |
| Chân 61 | NC — Not connected (per datasheet) |
| Chân 62 | NC — Not connected (per datasheet) |
| Chân 63 | NC — Not connected (per datasheet) |
| Chân 64 | EP — Exposed pad - must be soldered to ground plane |
Ứng dụng tiêu biểu
ATXMEGA64D3-MHR phù hợp cho 6 Áp dụngs: Industrial Sensor Hub, Building Automation Controller, HMI Touch Panel, USB Peripherals and HID Devices, Motor Control Front-End, Low-Power Wireless Sensor Node.
Industrial Sensor Hub
The ATXMEGA64D3-MHR fits industrial sensor hubs because its four-channel event system and DMA controller let multiple sensor interfaces signal each other without CPU wake-up, reducing active current to microamp levels in event-driven monitoring. The integrated 12-bit ADC with PGA enables direct connection to thermocouples, strain gauges, and 4-20 mA loop transmitters, while 64 KB Flash accommodates protocol stacks for Modbus RTU, IO-Link, or proprietary industrial buses. The 1.6 V to 3.6 V supply supports battery-backed operation from a single Li-ion cell, and the 64-pin VQFN (9x9) exposed pad lowers thermal resistance to ~30 C/W, enabling -40C to +85C operation on factory floors. Designers can add over-the-air firmware updates via the read-while-write Flash, critical for sealed installations where physical service is costly.
Được đề xuất
Building Automation Controller
For building automation, the ATXMEGA64D3-MHR provides the right balance of peripherals: multiple USART, SPI, and TWI interfaces connect to HVAC actuator drivers, light dimmers, and occupancy sensors, while the on-chip AES-128 engine secures BACnet/IP or KNX-style communications. The 50 GPIO package variant (other members of the D3 family) drive LED status panels and triac control outputs directly through MOSFET drivers, and 64 KB Flash comfortably holds protocol stacks plus a small embedded web server. The 1.6 V to 3.6 V supply permits direct operation from 24 V building-bus rails after a small LDO, and the -40C to +85C industrial range covers unheated plant rooms. The exposed-pad QFN package simplifies PCB thermal design in fire-rated enclosures.
Được đề xuất
HMI Touch Panel
The ATXMEGA64D3-MHR drives small HMI touch panels through its hardware SPI/TWI ports, which connect to capacitive touch controllers and TFT displays up to QVGA resolution. The DMA controller moves display frame-buffer data from Flash to SPI peripherals in the background, freeing the CPU for touch processing and logic tasks. With 64 KB Flash, designers embed GUI libraries (ucGUI, LVGL) plus application logic without external memory, while 4 KB SRAM supports modest frame buffers for monochrome screens. The 32 MHz core sustains up to 32 MIPS, sufficient for 50-60 Hz display refresh rates on 320x240 panels. Industrial -40C to +85C operation suits outdoor kiosk and appliance front-panel use cases.
Được đề xuất
USB Peripherals and HID Devices
The ATXMEGA64D3-MHR integrates a full-speed USB 2.0 device controller, eliminating external PHY chips for keyboards, mice, game controllers, and custom HID peripherals. Its 64 KB Flash comfortably stores USB class drivers (HID, CDC, MSD) plus application code, while 4 KB SRAM handles USB endpoint buffers and HID report descriptors without external memory. The 32 MHz CPU clock exceeds USB full-speed timing margins, and the 1.6 V to 3.6 V supply is compatible with USB VBUS after a 3.3 V LDO. The hardware AES-128 engine is valuable for secured USB tokens, smart-card readers, and FIDO-style authentication keys. Designers use Microchip's ASF USB stack to shorten development cycles.
Được đề xuất
Motor Control Front-End
The ATXMEGA64D3-MHR serves as a motor-control front-end, where its high-resolution 12-bit DAC generates reference waveforms and its event system synchronizes PWM edges to ADC sampling for sensorless BLDC commutation. The DMA controller transfers ADC results to memory without CPU intervention, supporting field-oriented control loops within microsecond budgets. With 64 KB Flash, designers implement vector-control firmware, while 4 KB SRAM holds state-space observer variables. The 50 GPIO variant (in the XMEGA D3 family) directly interfaces to gate drivers like the A4931 or A4989SLDTR-T, and the -40C to +85C range tolerates under-hood automotive and industrial motor enclosures.
Được đề xuất
Low-Power Wireless Sensor Node
For wireless sensor nodes, the ATXMEGA64D3-MHR pairs with an external 2.4 GHz or sub-GHz transceiver via SPI to form a battery-powered endpoint with hardware AES-128 encryption. The XMEGA D3's deep-sleep current below 1 microamp and event-driven wake-up architecture let sensor nodes run for years on a single CR2032 coin cell. With 64 KB Flash, designers embed 6LoWPAN or LoRaWAN stacks, and the read-while-write Flash enables in-field firmware upgrades without service interruption. The 1.6 V to 3.6 V supply range matches coin-cell voltage profiles across discharge curves, while the 64-pin VQFN (9x9) package footprint keeps PCB area small enough for coin-cell housings. Industrial temperature tolerance suits outdoor deployments.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho ATXMEGA64D3-MHR — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | ATXMEGA128D4-MH | ATXMEGA64D3-MH | ATXMEGA32D3-MH | ATXMEGA16D4-MH |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-VFQFN / QFN (9x9) | 64-VFQFN - same | 64-VFQFN - same | 64-VFQFN - same | 64-VFQFN - same |
| Flash Memory | 64 KB | 128 KB | 64 KB | 32 KB | 16 KB |
| SRAM | 4 KB | 8 KB | 4 KB | 4 KB | 2 KB |
| EEPROM | 2 KB | 2 KB | 2 KB | 1 KB | 1 KB |
| Maximum Clock | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| Supply Voltage | 1.6 V to 3.6 V | 1.6 V to 3.6 V | 1.6 V to 3.6 V | 1.6 V to 3.6 V | 1.6 V to 3.6 V |
| AES/DES Crypto Engine | Yes (AES-128, DES, 3DES) | Yes | Yes | Yes | Yes |
Bảo phân biệt quan trọng
- Integrated hardware AES-128/DES crypto engine (vsATMEGA328P-AUR)
- Read-while-write Flash memory (vsATMEGA328P-AUR)
- Dedicated four-channel event system (vsATSAMD21G18A-MU)
Ghi chú thiết kế
The 64-pin VQFN (9x9) package exposes a thermal pad on the underside that must be soldered to a continuous ground copper pour. According to Microchip package thermal data, this lowers junction-to-ambient thermal resistance (theta_JA) to approximately 30 C/W versus ~75 C/W for an unsoldered pad. For industrial -40C to +85C operation, route at least four thermal vias (0.3 mm drill) through the EP to the inner ground plane, ensuring the device dissipates the 50 mA to 80 mA active current without thermal limiting.
Place decoupling capacitors as close as physically possible to every VCC pin. According to XMEGA D3 reference designs, use 100 nF X7R ceramic on each of the four VCC pins and a single bulk 4.7 uF tantalum or aluminum-polymer cap within 10 mm of the package. The AVCC pin driving the ADC requires its own low-noise LDO (separate from the digital VCC) to maximize ADC SNR; the AREF pin should be bypassed with a 10 nF N2C ceramic plus 1 uF bulk capacitor.
Do not float the PDI_DATA and PDI_CLK pins - the device enters debug mode if PDI is asserted at reset. According to the XMEGA D3 datasheet, PDI must be tied low through a 10 kohm pull-down to enable normal startup. The RESET pin is active low and requires an external 10 kohm pull-up plus a 100 nF cap for proper POR behavior. Driving RESET high before VCC reaches 1.6 V can corrupt Flash; ensure VCC ramp is monotonic with no glitches at power-up.
Thông tin tuân thủ
RoHS compliant and lead-free per Microchip/Atmel product page. Not AEC-Q100 qualified - the XMEGA D3 family is industrial-grade only. For AEC-Q100 automotive needs, select ATmega or ATSAM automotive-grade parts instead.
