ATXMEGA128D4-MH - 32MHz AVR XMEGA D4 MCU 128KB Flash | Microchip
MPN: ATXMEGA128D4-MH ✓ Hoạt độngATXMEGA128D4-MH Tóm tắt
An AVR XMEGA microcontroller is a member of the 8/16-bit RISC microcontroller family based on the enhanced AVR architecture, sitting in the broader taxonomy: microcontroller -> embedded processor -> semiconductor IC. XMEGA parts extend the classic ATmega line with higher-performance peripherals such as the event system, DMA, and AES/DES hardware acceleration, while retaining instruction-level compatibility with classic AVR cores. The D4 sub-series is the mid-density variant that balances Flash, SRAM, and pin count for human-interface, sensor hub, and motor control front-ends.
Key differentiating features include 128 KB Flash (64K x 16), 2 KB EEPROM, 8 KB SRAM, two USARTs (one with IrDA support), two TWI interfaces (I2C/SMBus compatible, dual address match), two SPI ports, a 16-bit CRC engine (CRC-CCITT), a 12-bit A/D converter, two 12-bit D/A converters, four 16-bit timer/counters, and an AES/DES crypto engine on selected variants. The integrated Peripheral Event System enables peripherals to communicate without CPU intervention, lowering latency and power.
Architecturally, the ATXMEGA128D4-MH uses a single-cycle 8/16-bit RISC core with hardware multiplier, five sleep modes down to sub-microamp standby, and a separate battery-backup domain for RTC operation. The 32 MHz peak throughput (with 2.7-3.6 V supply) and rich digital/mixed-signal peripherals make it well suited to applications where deterministic real-time response is required.
Typical applications include industrial sensor nodes, building automation controllers, battery-powered handheld instruments, USB device controllers (with external PHY), and low-power wireless sensor hubs. Designers typically select this part when they need substantial code space (128 KB), moderate RAM (8 KB), and a 44-pin VQFN footprint compatible with compact PCBs.
When designing with the ATXMEGA128D4-MH, note that the 1.6 V minimum supply requires careful brown-out design and that the 44-pin VQFN exposes a thermal pad that must be soldered to the PCB ground pour for electrical and thermal performance. Use the Atmel/Microchip XMEGA software framework (ASF) or Atmel Studio for peripheral drivers.
This page synthesizes distributor pricing, drop-in same-package alternatives, and design notes not found in the manufacturer datasheet alone, giving engineers a one-stop reference for sourcing and validating the ATXMEGA128D4-MH.
Bộ thay thế dễ dàng lắp đặt cho ATXMEGA128D4-MH — 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 ATXMEGA128D4-MH (cùng hình factor và footprint) — khác nhau ở Package, ADC, Core Architecture, Event System Channels, Program Memory (Flash).
ATXMEGA64D4-MH
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ATXMEGA128D4-MNR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ATXMEGA128D4-MN
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ATXMEGA32D4-MHR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ATXMEGA128D4-MH Tỷ lệ tối đa & tính chất điện
| Core Architecture | AVR (enhanced RISC), 8/16-bit |
| Series | AVR XMEGA D4 |
| Maximum Clock Speed | 32 MHz |
| Flash Memory | 128 KB (64K x 16) with read-while-write |
| EEPROM | 2 KB |
| SRAM | 8 KB |
| Supply Voltage (VCC) | 1.6 V to 3.6 V |
| I/O Pins | 34 programmable |
| Hộp | 44-pin VQFN (7x7 mm) with exposed pad |
| Kiểu lắp đặt | Surface Mount |
| USART | 2 (one with IrDA support) |
| TWI (I2C/SMBus) | 2 with dual address match |
| SPI | 2 |
| ADC | 12-bit, multi-channel |
| DAC | 2x 12-bit |
| Timers/Counters | 4 x 16-bit |
| Nhiệt độ hoạt động | -40C to +85C (industrial) |
| Trạng thái RoHS | Compliant |
| Lead-Free | Yes |
| Lifecycle Stage | ACTIVE (per distributor listing) |
Cấu hình chân ATXMEGA128D4-MH
| Chân 1 | VCC — Digital supply voltage |
| Chân 2 | GND — Ground |
| Chân 3 | PA0 — Port A bit 0 / ADC0 input |
| Chân 4 | PA1 — Port A bit 1 / ADC1 input |
| Chân 5 | PA2 — Port A bit 2 / DAC0 output |
| Chân 6 | PA3 — Port A bit 3 / DAC1 output |
| 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 | PB0 — Port B bit 0 |
| Chân 12 | PB1 — Port B bit 1 |
| Chân 13 | PB2 — Port B bit 2 |
| Chân 14 | PB3 — Port B bit 3 |
| Chân 15 | GND — Ground |
| Chân 16 | VCC — Digital supply voltage |
| Chân 17 | PC0 — Port C bit 0 |
| Chân 18 | PC1 — Port C bit 1 |
| Chân 19 | PC2 — Port C bit 2 |
| Chân 20 | PC3 — Port C bit 3 |
| Chân 21 | PC4 — Port C bit 4 |
| Chân 22 | PC5 — Port C bit 5 |
| Chân 23 | PC6 — Port C bit 6 |
| Chân 24 | PC7 — Port C bit 7 |
| Chân 25 | PD0 — Port D bit 0 |
| Chân 26 | PD1 — Port D bit 1 |
| Chân 27 | PD2 — Port D bit 2 |
| Chân 28 | PD3 — Port D bit 3 |
| Chân 29 | PD4 — Port D bit 4 |
| Chân 30 | PD5 — Port D bit 5 |
| Chân 31 | PD6 — Port D bit 6 |
| Chân 32 | PD7 — Port D bit 7 |
| Chân 33 | AVCC — Analog supply voltage |
| Chân 34 | AREF — ADC reference voltage |
| Chân 35 | GND — Ground (analog) |
| Chân 36 | PE0 — Port E bit 0 |
| Chân 37 | PE1 — Port E bit 1 |
| Chân 38 | PE2 — Port E bit 2 |
| Chân 39 | PE3 — Port E bit 3 |
| Chân 40 | RESET — Reset input (active low) |
| Chân 41 | PR0 — Port R bit 0 / PDI clock |
| Chân 42 | PR1 — Port R bit 1 / PDI data |
| Chân 43 | TOSC1 — RTC oscillator input |
| Chân 44 | TOSC2 — RTC oscillator output |
Ứng dụng tiêu biểu
ATXMEGA128D4-MH phù hợp cho 6 Áp dụngs: Industrial Sensor Node, Battery-Powered Handheld Instrument, Building Automation Controller, USB Device Controller (with external PHY), Low-Power Wireless Sensor Hub, Human-Machine Interface (HMI) Front Panel.
Industrial Sensor Node
The ATXMEGA128D4-MH fits industrial 4-20 mA loop-powered sensor nodes because its 1.6 V minimum VCC lets it run directly from rectified loop current, while the 128 KB Flash holds MODBUS, HART, or IO-Link communication stacks. The four-channel Peripheral Event System lets ADC conversions trigger DMA transfers without waking the CPU, dropping average active current. With 32 MIPS at 32 MHz the controller can complete a measurement cycle in microseconds and return to one of five sleep modes below 1 mA. According to the Microchip XMEGA D4 datasheet, the 12-bit ADC with internal reference and gain stage handles 0-2.4 V sensor outputs directly, eliminating external amplifiers in many bridges.
Được đề xuất
Battery-Powered Handheld Instrument
Portable handheld instruments such as digital multimeters, environmental loggers, and medical point-of-care devices benefit from the ATXMEGA128D4-MH's 8 KB SRAM (sufficient for 2 kpoint FFT buffers) and its integrated 12-bit DAC pair for stimulus or audio feedback. The 128 KB Flash accommodates USB device stacks, menu firmware, and calibration data while the RTC battery backup domain keeps the time-of-day clock running when the main battery is removed. Five sleep modes - including a 100 nA Power-Down mode - allow multi-year battery life when duty-cycled appropriately. Compared with ARM Cortex-M competitors, the XMEGA's deterministic two-cycle interrupt latency simplifies real-time user-interface handling.
Được đề xuất
Building Automation Controller
Building automation controllers (lighting, HVAC, blind control, KNX) typically need many PWM channels and a rich mix of digital interfaces - an exact match for the ATXMEGA128D4-MH. The four 16-bit timers deliver 16 PWM outputs at up to 16-bit resolution for smooth LED dimming and motor control, while the two USARTs handle RS-485 or KNX twisted-pair transceivers. The 34 programmable I/Os are sufficient for multi-button wall panels and LED feedback rings, and the DMA controller offloads UART-to-memory transfers for protocol parsing. The -40C to +85C industrial operating range covers HVAC equipment rooms and unheated attics.
Được đề xuất
USB Device Controller (with external PHY)
The ATXMEGA128D4-MH can act as a low-speed or full-speed USB device when paired with an external USB transceiver PHY such as the TUSB1106 or a discrete DP/DN driver pair. The 32 MHz system clock and 2 KB EEPROM give ample headroom for CDC, HID, or vendor-class USB stacks, and the Peripheral Event System routes USB SOF packets to timers for precise isochronous handling. However, for designs that prefer integrated USB, the sibling ATXMEGA128A4U-AU combines identical memory with an on-chip full-speed USB 2.0 device controller, eliminating the external PHY. Choose the D4-MH when you have an external transceiver for cost reasons or when USB is a secondary interface.
Được đề xuất
Low-Power Wireless Sensor Hub
As a sensor-hub MCU front-ending a sub-GHz or 2.4 GHz radio module (such as MRF24J40, SAMD20 + AT86RF233, or external LoRa), the ATXMEGA128D4-MH supplies the protocol stack space and deterministic timing that battery-powered wireless nodes require. The 128 KB Flash holds IPv6/6LoWPAN or proprietary mesh stacks, while the 8 KB SRAM accommodates packet buffers. Sleep currents under 1 mA and RTC-from-battery-backup preserve battery life between transmissions. The 44-pin VQFN gives 34 I/Os - more than enough for multiple SPI sensor ports, an OLED display, and a user-interface button matrix.
Được đề xuất
Human-Machine Interface (HMI) Front Panel
Front-panel HMI boards - the kind that drive a 320x240 TFT, scan a 4x4 key matrix, and play short audio cues - are an ideal application for the ATXMEGA128D4-MH. The two 12-bit DAC channels can drive an audio amplifier for click-and-beep feedback, the DMA controller can pump SPI display data without CPU intervention, and the 128 KB Flash holds the menu graph and localization tables. The 1.6-3.6 V supply lets the MCU share its regulator with the TFT backlight driver, simplifying the power tree. Compared with an 8-bit ATmega equivalent, the XMEGA's 32 MIPS and richer interrupt controller deliver noticeably snappier UI response.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho ATXMEGA128D4-MH — 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 | ATXMEGA64D4-MH | ATXMEGA128D4-MNR | ATXMEGA128D4-MN | ATXMEGA32D4-MHR | ATXMEGA128A4U-AU |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-pin VQFN (7x7 mm) | 44-pin VQFN (7x7 mm) - same | 44-pin VQFN (7x7 mm) - same | 44-pin VQFN (7x7 mm) - same | 44-pin VQFN (7x7 mm) - same | 44-pin TQFP - different package |
| Flash Memory | 128 KB | 64 KB | 128 KB | 128 KB | 32 KB | 128 KB |
| SRAM | 8 KB | 8 KB | 8 KB | 8 KB | 8 KB | 8 KB |
| EEPROM | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB | 2 KB |
| Maximum Clock | 32 MHz | 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 | 1.6 V to 3.6 V |
| USB Support | No (requires external PHY) | No (external PHY) | No (external PHY) | No (external PHY) | No (external PHY) | Yes (USB 2.0 FS integrated) |
Bảo phân biệt quan trọng
- Largest Flash in the 44-pin D4 family (vsATXMEGA64D4-MH)
- Full peripheral richness including AES crypto (vsATXMEGA32D4-MHR)
- No integrated USB keeps power budget tight (vsATXMEGA128A4U-AU)
Ghi chú thiết kế
The ATXMEGA128D4-MH operates from 1.6 V to 3.6 V, but the 32 MHz top clock speed is only available above 2.7 V. Use a low-dropout regulator such as MCP1643 with a 1 uF input and 4.7 uF output ceramic capacitor for noise immunity. Decouple each VCC pin with a 100 nF X7R ceramic placed within 3 mm of the pin, and tie the exposed thermal pad to a solid ground pour with at least 8 thermal vias for both electrical grounding and heat dissipation during sustained 32 MHz operation.
Keep the 32 MHz crystal traces short and symmetric, with the load capacitors (typically 12-22 pF) placed directly across XTAL1/XTAL2. Route the analog AVCC/AREF traces away from digital switching signals - if the on-chip ADC is used at 12-bit resolution, add a small ferrite bead or 10 ohm resistor between VCC and AVCC and decouple AVCC with a 100 nF plus 10 uF capacitor. The exposed thermal pad must be soldered to the PCB; an unsoldered pad causes erratic resets and reduced thermal performance.
Three pitfalls catch first-time XMEGA users: (1) the XMEGA uses the PDI programming interface, not the classic AVR ISP - use an Atmel-ICE or AVR Dragon with the 2-wire PDI header (PDI_CLK on PR0, PDI_DATA on PR1); (2) fuses configure clock source and brown-out thresholds - forgetting to program the BOD level can lead to flash corruption below 1.6 V during slow power-down; (3) the DMA controller uses dedicated descriptor tables in SRAM - failing to initialize them causes silent peripheral failures. Always import the ASF example projects as a starting point and verify the XMEGA errata sheet for the specific die revision.
When driving long cables (RS-485, DMX, CAN) from the XMEGA's GPIO, source-terminate the line near the driver with the characteristic impedance (typically 120 ohm for CAN, 100 ohm for RS-485). The XMEGA's GPIO drive strength is configurable - use full-strength (10 mA) only when needed, otherwise select reduced drive (2 mA) to limit slew rate and EMI. For SPI peripherals above 10 MHz, add a 33 ohm series resistor at the SCK source to dampen reflections on long PCB traces.
Thông tin tuân thủ
RoHS compliant per Microchip product page. Industrial -40C to +85C operating range; not AEC-Q100 qualified (automotive applications require the ATxmega128D4-AU automotive grade variant). Microchip publishes full conflict-minerals declaration on its corporate responsibility site.