PIC32MX420F032H-40I/MR - 32-bit MCU 32KB Flash USB-OTG 64-VQFN
MPN: PIC32MX420F032H-40I/MR ✓ Hoạt độngPIC32MX420F032H-40I/MR Tóm tắt
What is a PIC32MX microcontroller? The PIC32MX family combines 32-bit MIPS M4K performance with PIC ecosystem familiarity and integrated peripherals like USB, CAN, and Ethernet. PIC32MX devices target embedded applications ranging from simple general-purpose control to advanced audio and connectivity, occupying the mid-performance tier between 8/16-bit MCUs and Cortex-M class devices.
Key differentiating features include 32KB Flash (32K x 8) for application code, 8KB SRAM for data, hardware multiply/divide and MIPS16e compressed-code mode (up to 40% smaller code), 53 I/O pins, and a 5-stage pipelined Harvard core. Industrial -40C to +85C operating temperature and 2.5V-3.6V supply support battery-tolerant designs, while the dedicated USB DMA channel offloads the CPU during USB transfers.
The MIPS32 M4K core with 5-stage pipeline and hardware divide completes one multiply per cycle and executes up to 66 DMIPS at 40 MHz, providing ample headroom for USB stacks and DSP-style algorithms. The USB 2.0 On-The-Go peripheral integrates the PHY, eliminating external USB transceivers and simplifying PCB layout for embedded hosts and devices.
Typical applications include USB peripherals (HID, CDC, MSD), industrial control nodes, audio interface controllers, sensor aggregation hubs, and connectivity gateways. The wide peripheral set (I2C, SPI, UART, PMP, 10-bit ADC) covers most general-purpose embedded designs without external components.
Design tip: Use MPLAB X IDE with XC32 compiler and MPLAB Harmony code configurator. Place a 0.1uF decoupling cap on every VDD/VSS pair, keep traces to the USB DP/DM pins short and length-matched, and connect the exposed pad (EP) to a continuous ground plane for thermal and electrical performance.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
Bộ thay thế dễ dàng lắp đặt cho PIC32MX420F032H-40I/MR — 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 PIC32MX420F032H-40I/MR (cùng hình factor và footprint) — khác nhau ở ADC, Package, Operating Temperature, USB, DMA Channels.
PIC32MX320F032HT-40I/MR
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC32MX440F032H-40I/MR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC32MX460F032H-40I/MR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC32MX320F064HT-40I/MR
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC32MX420F032HT-40I/MR
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC32MX340F128HT-80V/MR
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC32MX420F032H-40I/MR Tỷ lệ tối đa & tính chất điện
| Core Architecture | MIPS32 M4K, 5-stage pipeline, Harvard |
| CPU Core | PIC32MX (32-bit MIPS M4K) |
| Tần số xung maksimum | 40 MHz (66 DMIPS) |
| Program Memory (Flash) | 32 KB (32K x 8) |
| Data Memory (SRAM) | 8 KB |
| USB Interface | USB 2.0 On-The-Go with integrated PHY |
| Supply Voltage (VDD) | 2.5 V to 3.6 V |
| I/O Pins | 53 |
| ADC | 10-bit, up to 16 channels (1 Msps) |
| DMA Channels | Dedicated DMA channel for USB OTG + general-purpose DMA |
| Khoảng nhiệt độ hoạt động | -40C to +85C (Industrial) |
| Hộp | 64-pin VQFN (9x9 mm) with exposed pad |
| Kiểu lắp đặt | Surface Mount |
| Code-Compression Support | MIPS16e mode (up to 40% smaller code size) |
| Multiply / Divide | Hardware single-cycle 32x32-bit multiply and divide |
| Trạng thái RoHS | Compliant (LEAD FREE) |
Cấu hình chân PIC32MX420F032H-40I/MR
| Chân 1 | RP15/RF5 — Remappable peripheral pin / RF5 (varies by family revision) |
| Chân 2 | VDD — Positive supply voltage (2.5V-3.6V) |
| Chân 3 | RG15 — General purpose I/O port G bit 15 |
| Chân 4 | RG12 — General purpose I/O port G bit 12 |
| Chân 5 | VSS — Ground reference |
| Chân 6 | RG13 — General purpose I/O port G bit 13 |
| Chân 7 | RG14 — General purpose I/O port G bit 14 |
| Chân 8 | RC1 — General purpose I/O port C bit 1 |
| Chân 9 | RC2 — General purpose I/O port C bit 2 |
| Chân 10 | RC3 — General purpose I/O port C bit 3 |
| Chân 11 | RC4 — General purpose I/O port C bit 4 |
| Chân 12 | VSS — Ground reference |
| Chân 13 | VDD — Positive supply voltage (2.5V-3.6V) |
| Chân 14 | RA0 — General purpose I/O port A bit 0 |
| Chân 15 | RA1 — General purpose I/O port A bit 1 |
| Chân 16 | RA2 — General purpose I/O port A bit 2 |
| Chân 17 | RA3 — General purpose I/O port A bit 3 |
| Chân 18 | RA4 — General purpose I/O port A bit 4 |
| Chân 19 | RA5 — General purpose I/O port A bit 5 |
| Chân 20 | RA6 — General purpose I/O port A bit 6 |
| Chân 21 | RC13 — General purpose I/O port C bit 13 |
| Chân 22 | RC14 — General purpose I/O port C bit 14 |
| Chân 23 | RD0 — General purpose I/O port D bit 0 |
| Chân 24 | RD1 — General purpose I/O port D bit 1 |
| Chân 25 | RD2 — General purpose I/O port D bit 2 |
| Chân 26 | RD3 — General purpose I/O port D bit 3 |
| Chân 27 | RD4 — General purpose I/O port D bit 4 |
| Chân 28 | RD5 — General purpose I/O port D bit 5 |
| Chân 29 | RD6 — General purpose I/O port D bit 6 |
| Chân 30 | RD7 — General purpose I/O port D bit 7 |
| Chân 31 | VSS — Ground reference |
| Chân 32 | VDD — Positive supply voltage (2.5V-3.6V) |
| Chân 33 | RF0 — General purpose I/O port F bit 0 |
| Chân 34 | RF1 — General purpose I/O port F bit 1 |
| Chân 35 | RF2 — General purpose I/O port F bit 2 |
| Chân 36 | RF3 — General purpose I/O port F bit 3 |
| Chân 37 | RF4 — General purpose I/O port F bit 4 |
| Chân 38 | RF5 — General purpose I/O port F bit 5 |
| Chân 39 | RF6 — General purpose I/O port F bit 6 |
| Chân 40 | RF7 — General purpose I/O port F bit 7 |
| Chân 41 | RG6 — General purpose I/O port G bit 6 |
| Chân 42 | RG7 — General purpose I/O port G bit 7 |
| Chân 43 | RG8 — General purpose I/O port G bit 8 |
| Chân 44 | RG9 — General purpose I/O port G bit 9 |
| Chân 45 | VSS — Ground reference |
| Chân 46 | VDD — Positive supply voltage (2.5V-3.6V) |
| Chân 47 | RB0 — General purpose I/O port B bit 0 / PGED1 (programming data) |
| Chân 48 | RB1 — General purpose I/O port B bit 1 / PGEC1 (programming clock) |
| Chân 49 | RB2 — General purpose I/O port B bit 2 |
| Chân 50 | RB3 — General purpose I/O port B bit 3 |
| Chân 51 | RB4 — General purpose I/O port B bit 4 |
| Chân 52 | RB5 — General purpose I/O port B bit 5 |
| Chân 53 | RB6 — General purpose I/O port B bit 6 |
| Chân 54 | RB7 — General purpose I/O port B bit 7 |
| Chân 55 | RB8 — General purpose I/O port B bit 8 |
| Chân 56 | RB9 — General purpose I/O port B bit 9 |
| Chân 57 | RB10 — General purpose I/O port B bit 10 |
| Chân 58 | RB11 — General purpose I/O port B bit 11 |
| Chân 59 | RB12 — General purpose I/O port B bit 12 |
| Chân 60 | RB13 — General purpose I/O port B bit 13 |
| Chân 61 | RB14 — General purpose I/O port B bit 14 |
| Chân 62 | RB15 — General purpose I/O port B bit 15 |
| Chân 63 | D+ — USB D+ data line (differential pair with D-) |
| Chân 64 | D- — USB D- data line (differential pair with D+) |
Ứng dụng tiêu biểu
PIC32MX420F032H-40I/MR phù hợp cho 6 Áp dụngs: USB HID Peripheral Device, USB-to-UART Bridge, Industrial Sensor Hub, USB Mass Storage Reader, Audio Interface Controller, Connectivity Gateway / Edge Node.
USB HID Peripheral Device
The PIC32MX420F032H-40I/MR is well suited for USB Human Interface Device (HID) applications such as custom keypads, game controllers, and sensor input devices. Its integrated USB 2.0 On-The-Go controller with on-chip PHY eliminates external transceivers, while the dedicated DMA channel sustains full-speed 12 Mbps polling without CPU overhead. The 32 KB Flash accommodates Microchip's MPLAB Harmony USB stack plus HID class driver and application code, and 8 KB SRAM provides buffer headroom for HID reports and descriptors. The 40 MHz MIPS M4K core delivers 66 DMIPS, enough to debounce keys, run a small USB protocol stack, and process HID reports simultaneously. Pin count (53 GPIO) supports matrix-scanned keypads or multi-axis analog input. The 64-VQFN package allows compact PCB designs typical of USB dongles and embedded peripherals.
Được đề xuất
USB-to-UART Bridge
For USB-to-UART bridge designs (CDC class), the PIC32MX420F032H-40I/MR provides a single-chip solution: USB on one side, UART on the other, with full-speed 12 Mbps throughput. The integrated USB OTG PHY and DMA simplify the bus interface, while its three UART modules plus I2C/SPI allow expansion into USB-to-RS485 or USB-to-I2C bridges. Operating from 2.5-3.6V is compatible with 3.3V logic and many 5V-tolerant UART targets via external level shifters. The 32 KB Flash holds the CDC class driver, command interpreter, and a small bootloader for field-upgradeable firmware. Industrial -40C to +85C operation supports factory floor installations. The 64-VQFN (9x9 mm) package fits into compact cable dongles and panel-mount modules.
Được đề xuất
Industrial Sensor Hub
The PIC32MX420F032H-40I/MR's combination of 10-bit ADC (up to 16 channels), UART, I2C, SPI, and USB makes it ideal for industrial sensor aggregation hubs that sample analog sensors and expose data over USB or serial. With 32 KB Flash and 8 KB SRAM, it can buffer hundreds of samples, run a small RTOS or polled loop, and serve data via USB CDC or vendor class. The 40 MHz core completes single-cycle 32-bit multiplies, suitable for digital filtering and unit conversion of sensor data. Industrial -40C to +85C operation covers factory floor environments. The 53 GPIO support multiple sensor interfaces (SPI/I2C sensors, analog inputs, digital status LEDs). The 64-VQFN package with exposed pad enables effective thermal dissipation in enclosed industrial enclosures.
Được đề xuất
USB Mass Storage Reader
For embedded USB mass storage readers (e.g., USB card readers, USB-to-SD adapters), the PIC32MX420F032H-40I/MR provides USB host capability via its OTG controller plus SPI/parallel interface for SD cards and external flash. The dedicated DMA channel sustains USB bulk transfers while the CPU handles file system operations (FAT16/32 via Microchip's MDD library). At 40 MHz, performance is adequate for sequential read/write at full-speed USB rates. The 32 KB Flash holds USB host stack plus FAT library; 8 KB SRAM serves as transfer buffer. Multiple UART/SPI/I2C channels enable status LEDs, debug output, and external sensor interfaces. The industrial -40C to +85C temperature range supports outdoor or industrial enclosures.
Được đề xuất
Audio Interface Controller
The PIC32MX420F032H-40I/MR can serve as a USB audio class controller for USB-to-I2S bridges, USB headphone adapters, and USB microphone interfaces. Its I2S peripheral (via SPI with PCM mode) supports standard audio sample rates; the 10-bit ADC handles analog monitoring. USB isochronous transfers are handled by the OTG peripheral with DMA. The 32 KB Flash accommodates the USB audio class driver and small audio processing routines; 8 KB SRAM buffers USB audio packets. The 53 GPIO allow front-panel button/LED integration. Industrial temperature range supports professional audio equipment. The 64-VQFN footprint enables small form-factor USB audio dongles and embedded audio interfaces.
Được đề xuất
Connectivity Gateway / Edge Node
The PIC32MX420F032H-40I/MR can act as an edge gateway aggregating sensor data (UART, I2C, SPI, ADC) and forwarding it over USB to a host processor, PLC, or cloud gateway. Its USB device capability supports vendor-class bulk transfers at full speed, while UART and I2C connect to downstream sensors or modems. The 40 MHz MIPS M4K core can run a small TCP/IP offload stack (via PPP over UART) or a lightweight MQTT client. Industrial temperature and 2.5-3.6V operation suit battery-tolerant installations. With 32 KB Flash, it accommodates MQTT-SN or CoAP plus a sensor protocol stack. The 64-VQFN exposed pad provides thermal headroom in enclosed gateways.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC32MX420F032H-40I/MR — 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 | PIC32MX320F032HT-40I/MR | PIC32MX440F032H-40I/MR | PIC32MX460F032H-40I/MR | PIC32MX320F064HT-40I/MR | PIC32MX340F128HT-80V/MR |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 64-VQFN (9x9 mm, MR) | 64-VQFN (9x9 mm, MR) - same | 64-VQFN (9x9 mm, MR) - same | 64-VQFN (9x9 mm, MR) - same | 64-VQFN (9x9 mm, MR) - same | 64-VQFN (9x9 mm, MR) - same |
| Core / Max Clock | MIPS M4K / 40 MHz | MIPS M4K / 40 MHz | MIPS M4K / 40 MHz | MIPS M4K / 40 MHz | MIPS M4K / 40 MHz | MIPS M4K / 80 MHz (+100%) |
| Flash | 32 KB | 32 KB | 32 KB | 32 KB | 64 KB (+100%) | 128 KB (+300%) |
| SRAM | 8 KB | 8 KB | 8 KB | 8 KB | 16 KB (+100%) | 32 KB (+300%) |
| USB OTG with PHY | Yes | No | Yes | Yes | No | No |
| Ethernet MAC | No | No | Yes (10/100) | Yes (10/100) | No | No |
| CAN | No | No | No | Yes | No | No |
Bảo phân biệt quan trọng
- Integrated USB 2.0 On-The-Go with on-chip PHY and dedicated DMA (vsPIC32MX320F032HT-40I/MR)
- Single-chip USB + Ethernet solution in the same footprint (vsPIC32MX440F032H-40I/MR)
- Higher Flash and SRAM density in the same 64-VQFN package (vsPIC32MX340F128HT-80V/MR)
Ghi chú thiết kế
Decouple every VDD/VSS pair with a 0.1uF X7R ceramic capacitor placed as close to the IC pins as possible. Add a single 10uF bulk capacitor near the supply pin. The PIC32MX420F032H-40I/MR operates from a single 2.5-3.6V rail; for USB applications, use a 3.3V low-noise LDO (e.g. AP2112K-3.3) to meet USB bus-powered noise requirements. Place ferrite beads on the analog supply if sensitive ADC measurements are required.
The exposed thermal pad (EP) on the bottom of the 64-VQFN package MUST be soldered to a continuous ground plane for both thermal dissipation and electrical performance. Use thermal vias (8-12 vias in a 3x3 grid) to connect the EP pad to inner ground layers. Keep the USB D+/D- traces short, length-matched, and routed over a continuous ground plane with 90 ohm differential impedance for USB full-speed compliance.
Do not skip configuring the peripheral pin select (PPS) registers: most PIC32MX digital peripherals (UART, SPI, I2C) require explicit PPS mapping before use. Ensure the CONFIG bits are set correctly in code for the oscillator mode, watchdog, and JTAG/ICSP disable state. For USB applications, configure the on-chip PHY via the U1CON and U1OTGCON registers before enabling the USB module. Failure to do so results in non-functional USB enumeration.
The 53 GPIO pins default to analog input on reset; configure them as digital I/O via the TRISx and ANSELx registers before use. The 10-bit ADC inputs require the ANSELx bit cleared for digital mode. For high-speed signals (SPI > 10 MHz), use the PPS to map peripherals to specific pins and add 22-33 ohm series termination to reduce reflections. The USB D+/D- pair should not have any series resistors (per USB spec); use the on-chip PHY matching network only.
Thông tin tuân thủ
RoHS compliant per Microchip product packaging marking 'LEAD FREE'. Industrial -40C to +85C temperature grade. Not AEC-Q100 qualified - for automotive applications consider PIC32MX variants with -V or automotive suffixes.
