PIC32MX230F256B-50I/SP - 32-bit 50MHz 256KB Flash MCU | Microchip
MPN: PIC32MX230F256B-50I/SP ✓ Hoạt độngPIC32MX230F256B-50I/SP Tóm tắt
A 32-bit microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, data memory, and a rich set of peripherals on one silicon die. The PIC32MX family combines a MIPS32 RISC architecture with Microchip's peripheral ecosystem, targeting general-purpose embedded applications where 8-bit MCUs run out of headroom but full application processors are over-spec. PIC32MX230F256B variants sit at the low-power, USB-capable node of the family with up to 256 KB Flash and 64 KB SRAM across the wider PIC32MX230/250/270/280 series.
Key features of the PIC32MX230F256B-50I/SP include two I2S/SPI modules for codec and serial communications, Peripheral Pin Select (PPS) remappable I/O, Parallel Master Port (PMP) for graphics interfaces, mTouch capacitive touch support, and high-resolution 1 ns time measurement. An on-chip temperature sensor, RTCC, CTMU, and 10-bit ADC round out the analog/mixed-signal integration. The MIPS32 M4K core provides 5-stage pipeline execution with single-cycle multiplication, while 0.5 mA/MHz typical run current keeps active power low for USB-enabled designs.
The architecture pairs the 32-bit MIPS core with a 7-bit peripheral bus and dedicated DMA, allowing deterministic I/O servicing alongside CPU-bound DSP-style code. The 256 KB Flash supports live update partitioning and the 16 KB SRAM enables stack-heavy RTOS or TCP/IP stacks (Microchip's Harmony TCP/IP lite) without external memory. USB 2.0 full-speed OTG is integrated on the die, removing external PHY cost for HID, CDC, or vendor-class peripherals.
Typical applications include USB peripherals (HID keyboards, CDC serial bridges, vendor-class instrumentation), capacitive-touch user interfaces for appliances and HVAC controls, low-cost graphics with PMP-driven LCDs, sensor hubs with mTouch, and industrial control nodes requiring RTCC plus analog. The wide 2.3V-3.6V supply range and 50 MHz headroom suit battery-backed or 3.3V-regulated designs.
Designers should note that migrating code between PIC32MX230F256B-50I/SP and pin-compatible SPDIP variants on the same die (other speed grades or temperature windows) usually requires only configuration changes. The 28-pin SPDIP exposes 19 general-purpose I/O via PPS, so plan pin-out early.
This page synthesizes Microchip datasheet specifications, distributor pricing across 9 sources, and a curated list of pin-compatible 28-SPDIP alternatives drawn from the same PIC32MX230 family - information not consolidated on any single manufacturer or distributor page.
Bộ thay thế dễ dàng lắp đặt cho PIC32MX230F256B-50I/SP — 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 PIC32MX230F256B-50I/SP (cùng hình factor và footprint) — khác nhau ở Package, ADC, Operating Temperature, Mounting Type, Timers.
PIC32MX230F256B-I/SP
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC32MX230F256BT-I/SP
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC32MX230F256B-50I/SS
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC32MX230F128B-50I/SP
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC32MX270F256B-50I/SP
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC32MX230F064B-I/SP
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC32MX230F256B-50I/SP Tỷ lệ tối đa & tính chất điện
| Core Architecture | MIPS32 M4K 32-bit RISC |
| Maximum CPU Clock | 50 MHz |
| DMIPS Performance | 83 DMIPS |
| Program Flash Memory | 256 KB (256K x 8) |
| SRAM | 16 KB |
| Operating Voltage Range | 2.3 V to 3.6 V |
| Active Current (Typical) | 0.5 mA/MHz |
| I/O Pins | 19 |
| ADC | 10-bit |
| USB | USB 2.0 Full-Speed OTG |
| Serial Interfaces | 2x I2S/SPI, I2C, UART/USART, PMP, LIN, IrDA |
| Peripheral Pin Select (PPS) | Yes |
| Parallel Master Port (PMP) | Yes |
| mTouch Capacitive Touch | Supported |
| Real-Time Clock (RTCC) | Yes |
| Hộp | 28-pin SPDIP (SP) |
| Kiểu lắp đặt | Through-Hole |
| Nhiệt độ hoạt động | -40C to +85C (Industrial, I grade) |
| Trạng thái RoHS | Compliant |
Cấu hình chân PIC32MX230F256B-50I/SP
| Chân 1 | MCLR — Master Clear (reset) input, active-low |
| Chân 2 | RA0 — PORTA bit 0 / PPS-remappable I/O |
| Chân 3 | RA1 — PORTA bit 1 / PPS-remappable I/O |
| Chân 4 | RA2 — PORTA bit 2 / PPS-remappable I/O |
| Chân 5 | RA3 — PORTA bit 3 / PPS-remappable I/O |
| Chân 6 | RA4 — PORTA bit 4 / PPS-remappable I/O |
| Chân 7 | VDD — Positive supply (2.3V to 3.6V) |
| Chân 8 | VSS — Ground reference |
| Chân 9 | OSC1 — Crystal oscillator input or external clock |
| Chân 10 | OSC2 — Crystal oscillator output |
| Chân 11 | RB0 — PORTB bit 0 / PPS-remappable I/O |
| Chân 12 | RB1 — PORTB bit 1 / PPS-remappable I/O |
| Chân 13 | RB2 — PORTB bit 2 / PPS-remappable I/O |
| Chân 14 | RB3 — PORTB bit 3 / PPS-remappable I/O / AN3 |
| Chân 15 | RB4 — PORTB bit 4 / PPS-remappable I/O / AN4 |
| Chân 16 | RB5 — PORTB bit 5 / PPS-remappable I/O / AN5 |
| Chân 17 | RB6 — PORTB bit 6 / PPS-remappable I/O / AN6 |
| Chân 18 | RB7 — PORTB bit 7 / PPS-remappable I/O / AN7 |
| Chân 19 | VSS — Ground reference |
| Chân 20 | VDDCORE — Internal regulator output for core supply |
| Chân 21 | RB8 — PORTB bit 8 / PPS-remappable I/O |
| Chân 22 | D- — USB D- line |
| Chân 23 | D+ — USB D+ line |
| Chân 24 | RB9 — PORTB bit 9 / PPS-remappable I/O |
| Chân 25 | RB10 — PORTB bit 10 / PPS-remappable I/O |
| Chân 26 | RB11 — PORTB bit 11 / PPS-remappable I/O |
| Chân 27 | VSS — Ground reference |
| Chân 28 | VDD — Positive supply (2.3V to 3.6V) |
Ứng dụng tiêu biểu
PIC32MX230F256B-50I/SP phù hợp cho 6 Áp dụngs: USB HID Peripheral Devices, mTouch Capacitive Touch User Interface, Low-Cost Graphics Display with PMP, Industrial Sensor Hub with RTCC, Audio Codec Interface via I2S, Connected Appliance Control Board.
USB HID Peripheral Devices
The PIC32MX230F256B-50I/SP is purpose-built for USB Human Interface Devices thanks to its integrated USB 2.0 Full-Speed OTG controller with on-die transceiver. The 256 KB Flash and 16 KB SRAM comfortably host Microchip's MLA/Harmony HID stacks plus vendor-class descriptors, while 50 MHz / 83 DMIPS of MIPS M4K throughput handles polling at the 1 kHz HID spec minimum without CPU strain. Engineers typically connect D+ to pin 23 and D− to pin 22 with the standard 1.5 kΩ pull-up on D+, then route VBUS to a comparator input. Trade-off: the MCU needs a 3.3 V regulated rail; if your design is bus-powered, add a small LDO between VBUS and VDD.
Được đề xuất
mTouch Capacitive Touch User Interface
The PIC32MX230F256B-50I/SP integrates Microchip's CTMU (Charge Time Measurement Unit) and mTouch firmware libraries for capacitive touch buttons, sliders, and proximity sensors - eliminating external touch ICs. With 19 PPS-remappable I/O, designers can map touch channels to almost any pin and use the 1 ns timer resolution for robust noise rejection in appliance, HVAC, or industrial-control panels. Typical CTMU scan times under 1 ms per channel leave plenty of MIPS headroom for the main application loop. Trade-off: water/EMI immunity depends on PCB guard layout and proper CTMU calibration; plan sensor copper pours carefully and add driven shield traces for proximity.
Được đề xuất
Low-Cost Graphics Display with PMP
The PIC32MX230F256B-50I/SP's Parallel Master Port (PMP) interfaces directly to character or graphical LCDs in 8-bit or 16-bit modes, enabling cost-optimized HMI panels without an external display controller. With 256 KB Flash it can store multiple font tables, bitmaps, and menu structures on-chip, and the 50 MHz core refreshes small QVGA panels smoothly using simple DMA-style PMP transfers. The 19 I/O pins also allow a small keypad matrix or rotary encoder for input. Trade-off: PMP bus speed caps refresh at modest frame rates - this approach suits static or slowly-changing UI, not full-motion video.
Được đề xuất
Industrial Sensor Hub with RTCC
The PIC32MX230F256B-50I/SP combines an on-chip 10-bit ADC, integrated temperature sensor, and Real-Time Clock Calendar (RTCC) with backup power pin to deliver a self-contained sensor hub for industrial monitoring nodes. With 19 PPS-mappable I/O, the MCU can fan out to multiple I2C/SPI sensor stacks - temperature, humidity, pressure, or acceleration - and the 256 KB Flash accommodates drivers for dozens of sensor types alongside data logging buffers. Trade-off: the 10-bit ADC suffices for 0.5%-1% accuracy sensor readouts; designs needing 12+ bits should add an external ADC companion like the MCP3421.
Được đề xuất
Audio Codec Interface via I2S
The PIC32MX230F256B-50I/SP exposes two I2S modules, making it a fit for audio codec interface applications like digital audio playback heads, intercom panels, or simple voice prompt modules. The DMA-capable I2S peripherals offload sample streams from the CPU, while the 50 MHz MIPS M4K core is sufficient to run a software MP3 or ADPCM decoder. Combined with on-chip USB, the same MCU can stream audio from a host PC and render through a PCM/I2S codec. Trade-off: for >44.1 kHz stereo streams or multi-band DSP, consider PIC32MX270/275 with more RAM and faster I2S clock options.
Được đề xuất
Connected Appliance Control Board
The PIC32MX230F256B-50I/SP's blend of USB OTG, PMP graphics, mTouch support, and on-chip RTCC suits modern connected appliances - washing machine HMI panels, smart thermostats, coffee machine controllers - that combine touch input, LCD output, scheduling, and host connectivity. The 50 MHz core runs a small RTOS or state machine, while 256 KB Flash accommodates vendor protocols (Modbus, custom cloud APIs) over UART or USB CDC. Trade-off: no native Wi-Fi/BLE - designs needing wireless connectivity should pair with an ATWINC1500 or RN4871 module via the MCU's UART/SPI ports.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC32MX230F256B-50I/SP — 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 | PIC32MX230F256B-I/SP | PIC32MX230F256B-50I/SS | PIC32MX230F128B-50I/SP | PIC32MX270F256B-50I/SP | PIC32MX230F064B-I/SP |
|---|---|---|---|---|---|---|
| Package | 28-SPDIP (SP) | 28-SPDIP (SP) - same | 28-SSOP (SS) - SMD | 28-SPDIP (SP) - same | 28-SPDIP (SP) - same | 28-SPDIP (SP) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | MIPS32 M4K | MIPS32 M4K | MIPS32 M4K | MIPS32 M4K | MIPS32 M4K | MIPS32 M4K |
| Max Clock Speed | 50 MHz / 83 DMIPS | 50 MHz / 83 DMIPS | 50 MHz / 83 DMIPS | 50 MHz / 83 DMIPS | 50 MHz / 83 DMIPS | 50 MHz / 83 DMIPS |
| Flash Memory | 256 KB | 256 KB | 256 KB | 128 KB (-50%) | 256 KB | 64 KB (-75%) |
| SRAM | 16 KB | 16 KB | 16 KB | 16 KB | 64 KB (+300%) | 16 KB |
| USB | USB 2.0 FS OTG | USB 2.0 FS OTG | USB 2.0 FS OTG | USB 2.0 FS OTG | USB 2.0 FS OTG | USB 2.0 FS OTG |
| Operating Voltage | 2.3 V to 3.6 V | 2.3 V to 3.6 V | 2.3 V to 3.6 V | 2.3 V to 3.6 V | 2.3 V to 3.6 V | 2.3 V to 3.6 V |
Bảo phân biệt quan trọng
- Highest-density Flash in 28-SPDIP PIC32MX230 family (vsPIC32MX230F128B-50I/SP)
- 32-bit MIPS core with full PIC32MX270 peripheral compatibility (vsPIC32MX230F064B-I/SP)
- Integrated USB 2.0 FS OTG with on-die transceiver (vsPIC32MX130F064B-I/SP)
- 50 MHz / 83 DMIPS in through-hole 28-SPDIP (vsPIC32MX230F256B-50I/SS)
Ghi chú thiết kế
PIC32MX230F256B-50I/SP operates from 2.3 V to 3.6 V with 0.5 mA/MHz active typical current, peaking near 25 mA at 50 MHz full activity. Place a 10 µF bulk capacitor plus 100 nF decoupling on each VDD/VDDCORE pin pair (pins 7/20 and 28/20). Use a low-noise LDO such as MCP1700 for USB applications - switching regulators introduce ripple that can couple into the analog ADC channels and degrade touch sensing. Estimated: P_ACTIVE ≈ 50 MHz × 0.5 mA/MHz = 25 mA at 3.3 V ≈ 82.5 mW.
The 28-SPDIP is through-hole, but the underlying PIC32MX230 die runs at 50 MHz - keep crystal traces to OSC1/OSC2 short (under 5 mm) and guard with a ground ring to avoid EMI coupling into ADC inputs. For mTouch designs, use a hardware guard channel implemented with the CTMU and surround touch sensors with a driven shield trace connected to a PWM output. Keep USB D+/D- traces matched-length within 2 mm and route over a continuous ground plane.
Three common pitfalls on PIC32MX230 designs: (1) omitting the 1.5 kΩ pull-up on D+ for USB device enumeration - this prevents the host from detecting the device; (2) failing to configure Peripheral Pin Select (PPS) lock registers in firmware before assigning I/O - this leaves peripherals floating; (3) underestimating Flash endurance for USB bootloader use cases - the 256 KB Flash is rated for typical erase/write cycles per the datasheet, so plan for bootloader partition size in advance rather than discovering it after firmware overflow.
The 28-SPDIP package dissipates active power across all 28 pins and the leads, so junction-to-ambient thermal resistance is higher than SMD equivalents. Estimated: at 25 mA active current, internal power is roughly 82 mW; this yields only a few degrees Celsius temperature rise at typical industrial ambient. No heatsink is required for the 28-SPDIP variant. However, in enclosed enclosures without airflow, derate clock speed or switch to the 28-QFN (ML) package for better thermal coupling.
Thông tin tuân thủ
RoHS compliant per Microchip product page. Industrial -40C to +85C temperature grade; not AEC-Q100 automotive qualified - refer to PIC32MX variants with -V or -E extensions for automotive-grade temp ranges.
