ATXMEGA32C3-MH - 32KB Flash 32MHz 8/16-bit AVR XMEGA MCU | Microchip
MPN： ATXMEGA32C3-MH ✓ 啟用中ATXMEGA32C3-MH 概覽
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.
直接替換替代品，適用於 ATXMEGA32C3-MH — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： ATXMEGA32C3-MH （相同外形與佔位） — 差異在於 Package, ADC, SRAM, DAC, EEPROM.
ATXMEGA32C3-MHR
✅ 直接替換聯絡詢價
查看資料表 →ATXMEGA64C3-MH
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →ATXMEGA128C3-MH
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
ATXMEGA256C3-MH
✅ 直接替換聯絡詢價
查看資料表 →ATXMEGA128D4-MH
✅ 直接替換聯絡詢價
查看資料表 →ATXMEGA16D4-MH
✅ 直接替換聯絡詢價
查看資料表 →ATXMEGA32C3-MH 最大額定值與電氣特性
| 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 |
| 封裝 | 64-pin VQFN (9x9 mm) with exposed pad |
| 安裝類型 | Surface Mount |
| 工作溫度 | -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 |
| RoHS 狀態 | Compliant |
| Lead-Free | Yes |
ATXMEGA32C3-MH 腳位配置
| 腳位 1 | VCC — Supply voltage |
| 腳位 2 | GND — Ground |
| 腳位 3 | PA0 — GPIO Port A bit 0 |
| 腳位 4 | PA1 — GPIO Port A bit 1 |
| 腳位 5 | PA2 — GPIO Port A bit 2 |
| 腳位 6 | PA3 — GPIO Port A bit 3 |
| 腳位 7 | PA4 — GPIO Port A bit 4 |
| 腳位 8 | PA5 — GPIO Port A bit 5 |
| 腳位 9 | PA6 — GPIO Port A bit 6 |
| 腳位 10 | PA7 — GPIO Port A bit 7 |
| 腳位 11 | PB0 — GPIO Port B bit 0 |
| 腳位 12 | PB1 — GPIO Port B bit 1 |
| 腳位 13 | PB2 — GPIO Port B bit 2 |
| 腳位 14 | PB3 — GPIO Port B bit 3 |
| 腳位 15 | VCC — Supply voltage (second pin) |
| 腳位 16 | GND — Ground (second pin) |
| 腳位 17 | PB4 — GPIO Port B bit 4 |
| 腳位 18 | PB5 — GPIO Port B bit 5 |
| 腳位 19 | PB6 — GPIO Port B bit 6 |
| 腳位 20 | PB7 — GPIO Port B bit 7 |
| 腳位 21 | PC0 — GPIO Port C bit 0 |
| 腳位 22 | PC1 — GPIO Port C bit 1 |
| 腳位 23 | PC2 — GPIO Port C bit 2 |
| 腳位 24 | PC3 — GPIO Port C bit 3 |
| 腳位 25 | PC4 — GPIO Port C bit 4 |
| 腳位 26 | PC5 — GPIO Port C bit 5 |
| 腳位 27 | PC6 — GPIO Port C bit 6 |
| 腳位 28 | PC7 — GPIO Port C bit 7 |
| 腳位 29 | PD0 — GPIO Port D bit 0 |
| 腳位 30 | PD1 — GPIO Port D bit 1 |
| 腳位 31 | PD2 — GPIO Port D bit 2 |
| 腳位 32 | PD3 — GPIO Port D bit 3 |
| 腳位 33 | PD4 — GPIO Port D bit 4 |
| 腳位 34 | PD5 — GPIO Port D bit 5 |
| 腳位 35 | PD6 — GPIO Port D bit 6 |
| 腳位 36 | PD7 — GPIO Port D bit 7 |
| 腳位 37 | PE0 — GPIO Port E bit 0 |
| 腳位 38 | PE1 — GPIO Port E bit 1 |
| 腳位 39 | PE2 — GPIO Port E bit 2 |
| 腳位 40 | PE3 — GPIO Port E bit 3 |
| 腳位 41 | PE4 — GPIO Port E bit 4 |
| 腳位 42 | PE5 — GPIO Port E bit 5 |
| 腳位 43 | PE6 — GPIO Port E bit 6 |
| 腳位 44 | PE7 — GPIO Port E bit 7 |
| 腳位 45 | PF0 — GPIO Port F bit 0 |
| 腳位 46 | PF1 — GPIO Port F bit 1 |
| 腳位 47 | PF2 — GPIO Port F bit 2 |
| 腳位 48 | PF3 — GPIO Port F bit 3 |
| 腳位 49 | PF4 — GPIO Port F bit 4 |
| 腳位 50 | PF5 — GPIO Port F bit 5 |
| 腳位 51 | PF6 — GPIO Port F bit 6 |
| 腳位 52 | PF7 — GPIO Port F bit 7 |
| 腳位 53 | AVCC — Analog supply voltage |
| 腳位 54 | AGND — Analog ground |
| 腳位 55 | AREF — Analog reference voltage |
| 腳位 56 | TOSC1 — Timer oscillator pin 1 |
| 腳位 57 | TOSC2 — Timer oscillator pin 2 |
| 腳位 58 | XTAL1 — Crystal oscillator pin 1 |
| 腳位 59 | XTAL2 — Crystal oscillator pin 2 |
| 腳位 60 | RESET — Reset input (active low) |
| 腳位 61 | D- — USB data minus |
| 腳位 62 | D+ — USB data plus |
| 腳位 63 | VBUS — USB VBUS sense |
| 腳位 64 | NC — Not connected (per datasheet) |
典型應用
ATXMEGA32C3-MH 適用於 6 應用s: 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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
推薦產品摘要
工程參考資料，適用於 ATXMEGA32C3-MH — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | 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 |
主要差異化特點
- Smallest Flash in C3 family but full peripheral set retained (對比ATXMEGA256C3-MH)
- Retains USB Full-Speed where D4 family drops it (對比ATXMEGA128D4-MH)
- More SRAM and DMA-aware peripherals than ATmega328P (對比ATMEGA328P-AUR)
設計說明
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.
合規資訊
RoHS compliant and lead-free per Microchip product page; not AEC-Q100 qualified - not recommended for automotive safety-critical applications without further qualification
