ATXMEGA32C3-MH - 32KB Flash 32MHz 8/16-bit AVR XMEGA MCU | Microchip
MPN: ATXMEGA32C3-MH ✓ Hoạt độngATXMEGA32C3-MH Tóm tắt
An 8/16-bit microcontroller (MCU) is a single-chip computer built around an 8- or 16-bit data path that integrates a CPU core, non-volatile Flash program memory, volatile SRAM data memory, EEPROM for parameter storage, plus a rich set of on-chip peripherals (timers, ADC/DAC, communication controllers, GPIO). The ATXMEGA32C3 belongs to the XMEGA family in the broader hierarchy: 8/16-bit MCU -> microcontroller -> embedded processor -> semiconductor. It uses the AVR RISC instruction set with hardware multiplier, executes most instructions in a single clock cycle, and is targeted at industrial-grade, low-power embedded designs that need deterministic real-time response.
Key features of the ATXMEGA32C3-MH include four flexible 16-bit Timer/Counter modules, a 12-channel event system, a four-channel DMA controller that moves data without CPU intervention, a 12-bit ADC and 12-bit DAC, USB device support, AES/DES crypto acceleration, and an operating voltage range of 1.6 V to 3.6 V. Its 32 MHz core delivers up to 32 MIPS of throughput, and the integrated PicoPower technology reduces active and sleep-mode current.
Architecturally, the device pairs an event-driven peripheral fabric with the DMA controller, allowing analog conversion, packet transmission, and timer capture to run autonomously while the CPU sleeps. This architecture is well-suited to deterministic, low-latency control applications such as sensor hubs, motor control, and human-interface subsystems.
Typical applications include industrial sensor interfaces, USB-enabled consumer devices, building automation controllers, smart-metering subsystems, and human-machine interface (HMI) panels. The wide 1.6V-3.6V supply range also allows direct battery operation.
When designing with this device, ensure the 64-pin VQFN exposed pad is soldered to a sufficient ground copper pour for thermal and electrical performance. Decouple VDD with at least one 100 nF ceramic capacitor per supply pin placed as close as possible to the package.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, providing a single reference for engineers evaluating the ATXMEGA32C3-MH for new designs.
Bộ thay thế dễ dàng lắp đặt cho ATXMEGA32C3-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 ATXMEGA32C3-MH (cùng hình factor và footprint) — khác nhau ở Package, ADC, SRAM, DAC, EEPROM.
ATXMEGA32C3-MHR
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATXMEGA64C3-MH
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →ATXMEGA128C3-MH
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
ATXMEGA256C3-MH
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATXMEGA128D4-MH
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATXMEGA16D4-MH
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ATXMEGA32C3-MH Tỷ lệ tối đa & tính chất điện
| Core Architecture | AVR XMEGA (8/16-bit RISC) |
| Family | AVR XMEGA C3 |
| Maximum CPU Speed | 32 MHz |
| Program Memory (Flash) | 32 KB (16K x 16) |
| Boot Code Section | 8 KB |
| EEPROM | 2 KB |
| SRAM | 4 KB |
| Operating Voltage | 1.6 V to 3.6 V |
| Supply Voltage (Typ.) | 3.3 V |
| Hộp | 64-pin VQFN (9x9 mm) with exposed pad |
| Kiểu lắp đặt | Surface Mount |
| Nhiệt độ hoạt động | -40C to +85C (Industrial) |
| ADC | 12-bit |
| DAC | 12-bit |
| USB | USB Device (Full-Speed) |
| DMA Channels | 4 |
| Event System Channels | 12 |
| Crypto Engine | AES / DES |
| Trạng thái RoHS | Compliant |
| Lead-Free | Yes |
Cấu hình chân ATXMEGA32C3-MH
| Chân 1 | VCC — Supply voltage |
| Chân 2 | GND — Ground |
| Chân 3 | PA0 — GPIO Port A bit 0 |
| Chân 4 | PA1 — GPIO Port A bit 1 |
| Chân 5 | PA2 — GPIO Port A bit 2 |
| Chân 6 | PA3 — GPIO Port A bit 3 |
| Chân 7 | PA4 — GPIO Port A bit 4 |
| Chân 8 | PA5 — GPIO Port A bit 5 |
| Chân 9 | PA6 — GPIO Port A bit 6 |
| Chân 10 | PA7 — GPIO Port A bit 7 |
| Chân 11 | PB0 — GPIO Port B bit 0 |
| Chân 12 | PB1 — GPIO Port B bit 1 |
| Chân 13 | PB2 — GPIO Port B bit 2 |
| Chân 14 | PB3 — GPIO Port B bit 3 |
| Chân 15 | VCC — Supply voltage (second pin) |
| Chân 16 | GND — Ground (second pin) |
| Chân 17 | PB4 — GPIO Port B bit 4 |
| Chân 18 | PB5 — GPIO Port B bit 5 |
| Chân 19 | PB6 — GPIO Port B bit 6 |
| Chân 20 | PB7 — GPIO Port B bit 7 |
| Chân 21 | PC0 — GPIO Port C bit 0 |
| Chân 22 | PC1 — GPIO Port C bit 1 |
| Chân 23 | PC2 — GPIO Port C bit 2 |
| Chân 24 | PC3 — GPIO Port C bit 3 |
| Chân 25 | PC4 — GPIO Port C bit 4 |
| Chân 26 | PC5 — GPIO Port C bit 5 |
| Chân 27 | PC6 — GPIO Port C bit 6 |
| Chân 28 | PC7 — GPIO Port C bit 7 |
| Chân 29 | PD0 — GPIO Port D bit 0 |
| Chân 30 | PD1 — GPIO Port D bit 1 |
| Chân 31 | PD2 — GPIO Port D bit 2 |
| Chân 32 | PD3 — GPIO Port D bit 3 |
| Chân 33 | PD4 — GPIO Port D bit 4 |
| Chân 34 | PD5 — GPIO Port D bit 5 |
| Chân 35 | PD6 — GPIO Port D bit 6 |
| Chân 36 | PD7 — GPIO Port D bit 7 |
| Chân 37 | PE0 — GPIO Port E bit 0 |
| Chân 38 | PE1 — GPIO Port E bit 1 |
| Chân 39 | PE2 — GPIO Port E bit 2 |
| Chân 40 | PE3 — GPIO Port E bit 3 |
| Chân 41 | PE4 — GPIO Port E bit 4 |
| Chân 42 | PE5 — GPIO Port E bit 5 |
| Chân 43 | PE6 — GPIO Port E bit 6 |
| Chân 44 | PE7 — GPIO Port E bit 7 |
| Chân 45 | PF0 — GPIO Port F bit 0 |
| Chân 46 | PF1 — GPIO Port F bit 1 |
| Chân 47 | PF2 — GPIO Port F bit 2 |
| Chân 48 | PF3 — GPIO Port F bit 3 |
| Chân 49 | PF4 — GPIO Port F bit 4 |
| Chân 50 | PF5 — GPIO Port F bit 5 |
| Chân 51 | PF6 — GPIO Port F bit 6 |
| Chân 52 | PF7 — GPIO Port F bit 7 |
| Chân 53 | AVCC — Analog supply voltage |
| Chân 54 | AGND — Analog ground |
| Chân 55 | AREF — Analog reference voltage |
| Chân 56 | TOSC1 — Timer oscillator pin 1 |
| Chân 57 | TOSC2 — Timer oscillator pin 2 |
| Chân 58 | XTAL1 — Crystal oscillator pin 1 |
| Chân 59 | XTAL2 — Crystal oscillator pin 2 |
| Chân 60 | RESET — Reset input (active low) |
| Chân 61 | D- — USB data minus |
| Chân 62 | D+ — USB data plus |
| Chân 63 | VBUS — USB VBUS sense |
| Chân 64 | NC — Not connected (per datasheet) |
Ứng dụng tiêu biểu
ATXMEGA32C3-MH phù hợp cho 6 Áp dụngs: Industrial Sensor Interface, USB-Enabled Consumer Peripheral, Building Automation Controller, Smart Metering Subsystem, Human-Machine Interface (HMI) Panel, Battery-Powered IoT Sensor Node.
Industrial Sensor Interface
The ATXMEGA32C3-MH's 12-bit ADC (with PGA), four-channel DMA controller, and twelve-channel event system make it well-suited to industrial sensor aggregation boards where deterministic, low-latency acquisition is required. The 32 KB Flash holds a typical CAN- or RS-485-based sensor stack with margin, while the 1.6-3.6 V supply range allows operation from 24 V industrial rails after regulation. Compared with switching regulator based designs, the device's 12-bit DAC provides stable analog outputs for transducer excitation, and the event system lets multiple sensors trigger ADC captures without CPU intervention, reducing jitter and overall system power.
Được đề xuất
USB-Enabled Consumer Peripheral
The integrated USB Full-Speed (12 Mbps) device controller in the ATXMEGA32C3-MH removes the need for an external bridge chip in HID, CDC, or vendor-class peripherals. The 32 MHz core easily runs USB protocol stacks plus application code, while the 32 KB Flash accommodates composite device descriptors and command parsers. The 1.6-3.6 V supply directly powers the device from a USB VBUS rail (after regulation), simplifying BOM. Designers benefit from the AES/DES engine when adding secure firmware update paths, and from PicoPower modes for battery-powered accessories.
Được đề xuất
Building Automation Controller
For HVAC controllers, smart thermostats, and lighting-control nodes, the ATXMEGA32C3-MH combines 32 KB Flash with 2 KB EEPROM for non-volatile parameter storage (setpoints, schedules, calibration). The four-channel DMA controller autonomously moves ADC samples into SRAM, freeing CPU time for control-loop math, and the 12-bit DAC drives analog actuators with sub-1 LSB monotonic outputs. Operating from 1.6-3.6 V allows direct 3.3 V regulator outputs commonly used in 24 V building-automation backplanes. The wide -40C to +85C industrial temperature range ensures reliable operation in unconditioned enclosures.
Được đề xuất
Smart Metering Subsystem
The ATXMEGA32C3-MH fits smart electricity, water, and gas metering subsystems that demand deterministic measurement, low standby power, and tamper-resistant firmware. The 12-bit ADC and event-driven capture deliver accurate metrology, while the AES/DES crypto engine accelerates secure communication to concentrators. The 8 KB boot-code section supports secure bootloader schemes, and read-while-write Flash allows OTA firmware updates without service interruption. PicoPower sleep modes keep idle current below typical meter standby budgets.
Được đề xuất
Human-Machine Interface (HMI) Panel
HMI front-panel controllers benefit from the ATXMEGA32C3-MH's 12-bit DAC (for smooth backlight PWM-free analog dimming), 32 KB Flash (for menu state machines and custom fonts), and the event system for low-latency rotary-encoder or button scanning. The 64-pin VQFN provides enough GPIO to drive segment LCDs, keypads, and LEDs simultaneously. The -40C to +85C industrial temperature range and 1.6-3.6 V supply make it tolerant of wide industrial supply rails.
Được đề xuất
Battery-Powered IoT Sensor Node
PicoPower technology combined with the ATXMEGA32C3-MH's event system and DMA controller minimizes average current in IoT sensor nodes. The MCU can stay in a sub-microamp sleep state, wake on event-system triggers to perform an ADC conversion via DMA, then return to sleep without CPU intervention - ideal for multi-year coin-cell deployments. The 1.6 V minimum supply allows operation down to near-end-of-discharge of a single Li-primary cell, while AES/DES accelerates secure join procedures. The 32 KB Flash is sufficient for Thread/Zigbee application stacks with margin.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho ATXMEGA32C3-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 | ATXMEGA32C3-MHR | ATXMEGA64C3-MH | ATXMEGA128C3-MH | ATXMEGA256C3-MH | ATXMEGA128D4-MH |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-pin VQFN (9x9 mm) | 64-pin VQFN (9x9 mm) - same | 64-pin VQFN (9x9 mm) - same | 64-pin VQFN (9x9 mm) - same | 64-pin VQFN (9x9 mm) - same | 64-pin VQFN (9x9 mm) - same |
| Flash Memory | 32 KB | 32 KB | 64 KB | 128 KB | 256 KB | 128 KB |
| SRAM | 4 KB | 4 KB | 4 KB | 8 KB | 16 KB | 8 KB |
| Maximum Clock Speed | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz | 32 MHz |
| USB | Yes (Full-Speed) | Yes (Full-Speed) | Yes (Full-Speed) | Yes (Full-Speed) | Yes (Full-Speed) | No |
| Operating 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 |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
Bảo phân biệt quan trọng
- Smallest Flash in C3 family but full peripheral set retained (vsATXMEGA256C3-MH)
- Retains USB Full-Speed where D4 family drops it (vsATXMEGA128D4-MH)
- More SRAM and DMA-aware peripherals than ATmega328P (vsATMEGA328P-AUR)
Ghi chú thiết kế
The 64-pin VQFN package has an exposed thermal pad on the underside that must be soldered to a ground copper pour. Use at least four thermal vias in the pad to the inner ground plane to keep theta_JA within the datasheet's 30 C/W envelope. Estimated: at 32 MHz active, internal core dissipation is roughly 30 mW, but I/O switching at full GPIO toggle can add 50-100 mW; without a good thermal pad connection junction temperature can rise 10-15 C above ambient in still air.
Decouple every VCC pin with a 100 nF ceramic capacitor placed within 2 mm of the package pin, and add a single bulk 4.7 uF to 10 uF ceramic on the main 3.3 V rail. The XMEGA C3 family has multiple VCC/AVCC pairs - separate analog and digital supplies when designing with the on-chip ADC to avoid digital switching noise coupling into analog conversions. Brown-out detection at 1.6 V should be enabled in firmware to prevent Flash corruption during supply droops.
Do not exceed the 3.6 V absolute maximum on any pin, including during in-circuit programming. When using the USB module, place 22 ohm series resistors on D+ and D- as close to the MCU pins as possible, and ensure the VBUS pin is connected to a voltage divider for proper detection (the XMEGA USB module requires a 3.3 V-aware sense input). Avoid driving XTAL2 when using the internal oscillator unless external crystal mode is explicitly configured in the fuse bytes.
Keep the analog reference traces (AREF, AVCC, AGND) short and routed away from digital switching signals and clock traces. Place the ADC decoupling cap adjacent to AVCC/AGND. For USB designs, maintain 90-ohm differential impedance on the D+/D- pair and avoid routing near high-current switching nodes. The 32 MHz oscillator traces should be guarded by ground on both sides to minimize radiated EMI.
Thông tin tuân thủ
RoHS compliant and lead-free per Microchip product page; not AEC-Q100 qualified - not recommended for automotive safety-critical applications without further qualification
