PIC32MX550F256L-V/PF - 32-bit MCU, 256KB Flash, USB/CAN | Microchip
MPN： PIC32MX550F256L-V/PF ✓ 啟用中PIC32MX550F256L-V/PF 概覽
A 32-bit microcontroller (MCU) is a single-chip processor that integrates CPU, memory (Flash/RAM), and programmable peripherals. MCUs sit at the foundation of embedded systems, sitting hierarchically under the broader category of microcontrollers, then embedded processors, then semiconductors. The PIC32MX family specifically uses the MIPS32 instruction set, which differs architecturally from ARM Cortex-M cores while offering competitive code density and deterministic interrupt latency.
Key features include 50 MHz core with single-cycle multiply, hardware multiply/divide, 16-bit wide instruction path, 5-channel DMA, four 16-bit timers/captures, five UART modules, two comparators, CTMU (Charge Time Measurement Unit), RTCC, and an 8-bit Parallel Master Port. The PPS system remaps digital peripherals to most I/O pins, simplifying PCB layout.
Typical applications include industrial USB device controllers, CAN-based automotive node ECUs, low-cost HMI panels with PMP-driven LCDs, audio codecs bridging via I2S, and embedded point-of-sale terminals. The integrated USB OTG plus CAN combination is rare in this price tier and is the primary differentiator versus PIC32MX4xx/2xx parts that lack USB or CAN.
When designing with this device, observe the 100-pin TQFP land pattern, ensure 3.3V rail decoupling within 5 mm of every VDD/VSS pair, and reserve JTAG/PGD/PGC test access per the Microchip programming specification. For CAN bus termination, add a 120 ohm resistor at each node end.
直接替換替代品，適用於 PIC32MX550F256L-V/PF — 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： PIC32MX550F256L-V/PF （相同外形與佔位） — 差異在於 Core Architecture, ADC, Package, CAN, USB.
PIC32MX550F256LT-V/PF
✅ 直接替換聯絡詢價
查看資料表 →PIC32MX550F256L-V/PT
✅ 直接替換聯絡詢價
查看資料表 →PIC32MX550F256L-50I/PF
✅ 直接替換聯絡詢價
查看資料表 →PIC32MX550F256L-50I/PT
✅ 直接替換聯絡詢價
查看資料表 →PIC32MX534F064L-V/PF
✅ 直接替換聯絡詢價
查看資料表 →PIC32MX450F256L-V/PF
✅ 直接替換聯絡詢價
查看資料表 →PIC32MX550F256L-V/PF 最大額定值與電氣特性
| Core | MIPS32 M4K |
| Core Architecture | MIPS32 |
| Maximum Core Frequency | 50 MHz |
| DMIPS | 83 |
| Program Memory (Flash) | 256 KB |
| Data Memory (SRAM) | 32 KB |
| Operating Voltage | 2.3 V to 3.6 V |
| I/O Pins | 85 |
| USB | USB 2.0 Full-Speed OTG |
| CAN | CAN 2.0B with DeviceNet addressing |
| SPI Modules | 4 |
| I2S Modules | 2 |
| UART Modules | 5 |
| PMP (Parallel Master Port) | Yes, 8-bit with dual buffers |
| Timers | 5 x 16-bit |
| DMA Channels | 5 |
| PPS (Peripheral Pin Select) | Yes |
| CTMU | Yes |
| RTCC | Yes |
| Comparators | 2 |
| Temperature Grade | -40C to +105C (V grade) |
| 封裝 | 100-pin TQFP (14x14 mm) |
| 安裝類型 | Surface Mount |
| RoHS | Compliant |
PIC32MX550F256L-V/PF 腳位配置
| 腳位 1 | RG15 — Port RG15 I/O pin |
| 腳位 2 | VSS — Ground reference |
| 腳位 3 | RD0 — Port RD0 / PMD0 / INT0 |
| 腳位 4 | RD1 — Port RD1 / PMD1 |
| 腳位 5 | RD2 — Port RD2 / PMD2 |
| 腳位 6 | RD3 — Port RD3 / PMD3 |
| 腳位 7 | RD4 — Port RD4 / PMD4 |
| 腳位 8 | RD5 — Port RD5 / PMD5 |
| 腳位 9 | RD6 — Port RD6 / PMD6 |
| 腳位 10 | RD7 — Port RD7 / PMD7 |
| 腳位 11 | VSS — Ground reference |
| 腳位 12 | RC13 — Port RC13 I/O |
| 腳位 13 | RC14 — Port RC14 I/O |
| 腳位 14 | RB0 — Port RB0 / PGED3 / AN0 |
| 腳位 15 | RB1 — Port RB1 / PGEC3 / AN1 |
| 腳位 16 | RB2 — Port RB2 / AN2 |
| 腳位 17 | RB3 — Port RB3 / AN3 |
| 腳位 18 | RB4 — Port RB4 / AN4 |
| 腳位 19 | RB5 — Port RB5 / AN5 / VBUS |
| 腳位 20 | RB6 — Port RB6 / AN6 / OC1 |
| 腳位 21 | RB7 — Port RB7 / AN7 |
| 腳位 22 | VDD — Positive supply 2.3-3.6V |
| 腳位 23 | VSS — Ground reference |
| 腳位 24 | RA9 — Port RA9 I/O |
| 腳位 25 | RA10 — Port RA10 I/O |
| 腳位 26 | RA0 — Port RA0 / TMS |
| 腳位 27 | RA1 — Port RA1 / TCK |
| 腳位 28 | RA2 — Port RA2 / SDA2 |
| 腳位 29 | RA3 — Port RA3 / SCL2 |
| 腳位 30 | RA4 — Port RA4 I/O |
| 腳位 31 | RA5 — Port RA5 I/O |
| 腳位 32 | VDD — Positive supply 2.3-3.6V |
| 腳位 33 | VSS — Ground reference |
| 腳位 34 | RB8 — Port RB8 / OC2 |
| 腳位 35 | RB9 — Port RB9 / IC2 |
| 腳位 36 | RB10 — Port RB10 I/O |
| 腳位 37 | RB11 — Port RB11 I/O |
| 腳位 38 | RB12 — Port RB12 I/O |
| 腳位 39 | RB13 — Port RB13 I/O |
| 腳位 40 | RB14 — Port RB14 / VBUSON |
| 腳位 41 | RB15 — Port RB15 / OCFB |
| 腳位 42 | VSS — Ground reference |
| 腳位 43 | RF0 — Port RF0 |
| 腳位 44 | RF1 — Port RF1 |
| 腳位 45 | RF2 — Port RF2 / SDA1 |
| 腳位 46 | RF3 — Port RF3 / SCL1 |
| 腳位 47 | RF4 — Port RF4 / OC4 |
| 腳位 48 | RF5 — Port RF5 / SDO1 |
| 腳位 49 | VDD — Positive supply 2.3-3.6V |
| 腳位 50 | VSS — Ground reference |
| 腳位 51 | RF6 — Port RF6 / SCK1 |
| 腳位 52 | RF7 — Port RF7 / U1CTS |
| 腳位 53 | RF8 — Port RF8 / U1RTS |
| 腳位 54 | RF9 — Port RF9 / U2CTS |
| 腳位 55 | RF10 — Port RF10 / U2RTS |
| 腳位 56 | RF11 — Port RF11 / U3CTS |
| 腳位 57 | RF12 — Port RF12 / U3RTS |
| 腳位 58 | RF13 — Port RF13 / U4CTS |
| 腳位 59 | RF14 — Port RF14 / U4RTS |
| 腳位 60 | RF15 — Port RF15 / U5CTS |
| 腳位 61 | VSS — Ground reference |
| 腳位 62 | RG6 — Port RG6 / SCK2 |
| 腳位 63 | RG7 — Port RG7 / SDO2 |
| 腳位 64 | RG8 — Port RG8 / SDI2 |
| 腳位 65 | RG9 — Port RG9 / SS2 |
| 腳位 66 | VDD — Positive supply 2.3-3.6V |
| 腳位 67 | RC1 — Port RC1 / OC1 |
| 腳位 68 | RC2 — Port RC2 / OC2 |
| 腳位 69 | RC3 — Port RC3 / OC3 |
| 腳位 70 | RC4 — Port RC4 / SDI1 |
| 腳位 71 | VSS — Ground reference |
| 腳位 72 | RD8 — Port RD8 / PMA0 |
| 腳位 73 | RD9 — Port RD9 / PMA1 |
| 腳位 74 | RD10 — Port RD10 / PMA2 |
| 腳位 75 | RD11 — Port RD11 / PMA3 |
| 腳位 76 | RD12 — Port RD12 / PMA4 |
| 腳位 77 | RD13 — Port RD13 / PMA5 |
| 腳位 78 | RD14 — Port RD14 / PMA6 |
| 腳位 79 | RD15 — Port RD15 / PMA7 |
| 腳位 80 | VSS — Ground reference |
| 腳位 81 | RE0 — Port RE0 / PMRD |
| 腳位 82 | RE1 — Port RE1 / PMWR |
| 腳位 83 | RE2 — Port RE2 / CS1 |
| 腳位 84 | RE3 — Port RE3 / CS2 |
| 腳位 85 | RE4 — Port RE4 / AER |
| 腳位 86 | RE5 — Port RE5 / ALR |
| 腳位 87 | VDD — Positive supply 2.3-3.6V |
| 腳位 88 | VDD — Positive supply 2.3-3.6V |
| 腳位 89 | RG0 — Port RG0 / C1RX |
| 腳位 90 | RG1 — Port RG1 / C1TX |
| 腳位 91 | RG2 — Port RG2 / DMI |
| 腳位 92 | RG3 — Port RG3 / DPO |
| 腳位 93 | RA6 — Port RA6 / TRCLK |
| 腳位 94 | RA7 — Port RA7 / TRD0 |
| 腳位 95 | VSS — Ground reference |
| 腳位 96 | RG14 — Port RG14 / SDA3 |
| 腳位 97 | RG12 — Port RG12 / SCL3 |
| 腳位 98 | RG13 — Port RG13 / SDA4 |
| 腳位 99 | RG10 — Port RG10 / SCL4 |
| 腳位 100 | RG11 — Port RG11 / U5RTS |
典型應用
PIC32MX550F256L-V/PF 適用於 7 應用s: Industrial USB Device / HID Controller, CAN-Based Automotive / Industrial Node ECU, Low-Cost HMI Panel with Graphics LCD, Audio Codec Interface (I2S Bridge), Embedded Point-of-Sale Terminal, Sensor Hub with USB / CAN Aggregation, USB-to-CAN Gateway Bridge.
Industrial USB Device / HID Controller
The PIC32MX550F256L-V/PF is purpose-built for industrial USB peripherals thanks to its integrated USB 2.0 Full-Speed OTG controller, eliminating the need for an external USB PHY. The 50 MHz MIPS32 M4K core delivers 83 DMIPS, providing responsive HID report transfer throughput for barcode readers, USB-to-CAN gateways, and USB-connected data loggers. The -40C to +105C (V grade) operation handles factory-floor temperature swings. Use it between a USB host port and a downstream sensor array with 5-channel DMA offloading bulk transfers.
推薦
CAN-Based Automotive / Industrial Node ECU
The integrated CAN 2.0B module with DeviceNet addressing support makes this part ideal for in-vehicle networking nodes, body controllers, and industrial CANopen / DeviceNet slave devices. The 256 KB Flash accommodates CANopen or J1939 protocol stacks, while 32 KB SRAM handles CAN message buffering plus application code. Place the MCU on the CAN bus with a TJA1050 or MCP2551 transceiver; the on-chip CAN controller supports up to 1 Mbps bus speed. The 100-pin package enables fiber access via the TQFP footprint with 85 usable I/O pins.
推薦
Low-Cost HMI Panel with Graphics LCD
The 8-bit Parallel Master Port (PMP) with dual read/write buffers drives graphics TFT or character LCDs directly, eliminating external display controllers. Combined with Peripheral Pin Select (PPS), the design engineer can map data lines to convenient PCB locations, simplifying layout. The 50 MHz core sustains 60 fps display refreshes for small QVGA panels, while 256 KB Flash stores graphical assets. Place the MCU on a 4-layer PCB with the PMP data bus routed as 8-bit matched traces to the LCD connector.
推薦
Audio Codec Interface (I2S Bridge)
Two I2S modules plus four SPI modules make the PIC32MX550F256L-V/PF a flexible audio bridge, routing digital audio between I2S codecs, SPI DACs, and external DSPs. The 50 MHz core sustains 48 kHz / 24-bit stereo I2S streams with headroom for DSP effects. Use the DMA controller for double-buffered I2S transfers, freeing the CPU for filtering. The PPS system lets the design engineer reassign I2S clock/data lines to any GPIO pin, easing PCB constraints versus fixed-pin MCUs.
推薦
Embedded Point-of-Sale Terminal
Point-of-sale terminals benefit from USB device connectivity, CAN for terminal networking, and the integrated CTMU for capacitive keypad scanning. The 256 KB Flash stores transaction handlers, USB HID stacks, and LCD UI fonts. The CTMU eliminates external touch-scan ASICs, reducing BOM cost. Place the MCU between a USB-connected host terminal and a CAN-connected POS network backbone, with I2S delivering audio prompts through an external DAC. The V suffix enables stable operation in -40C to +105C environments.
推薦
Sensor Hub with USB / CAN Aggregation
Aggregate multiple SPI sensors, RTCC time stamping, and a CTMU-driven touch interface, then push the data upstream via USB or CAN. The 5-channel DMA offloads sensor reads from the CPU, while the dual I2S modules route audio cues. The 32 KB SRAM holds time-stamped sensor buffers. Use the RTCC for data logging timestamps, and PPS to map interrupt-capable GPIO pins for sensor event triggers. The 100-pin TQFP gives 85 usable I/O for sensor fan-out.
推薦
USB-to-CAN Gateway Bridge
Combine the USB 2.0 Full-Speed OTG controller with the CAN 2.0B module to build a USB-to-CAN gateway used in automotive diagnostics, industrial protocol conversion, and CANopen bridges. The 50 MHz core sustains full-speed USB 12 Mbps throughput with CAN bus traffic. The 32 KB SRAM buffers USB packets during CAN bus contention. Place a TJA1050 or MCP2551 CAN transceiver on the bus, and route USB D+/D- to a USB Type-B connector with proper 15 kohm pull-down resistors.
推薦
推薦產品摘要
工程參考資料，適用於 PIC32MX550F256L-V/PF — 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 | PIC32MX550F256LT-V/PF | PIC32MX550F256L-50I/PF | PIC32MX534F064L-V/PF | PIC32MX450F256L-V/PF | PIC32MX550F256L-V/PT |
|---|---|---|---|---|---|---|
| Package | 100-pin TQFP (14x14) | 100-pin TQFP (14x14) - same | 100-pin TQFP (14x14) - same | 100-pin TQFP (14x14) - same | 100-pin TQFP (14x14) - same | 64-pin TQFP - different |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash | 256 KB | 256 KB | 256 KB | 64 KB | 256 KB | 256 KB |
| SRAM | 32 KB | 32 KB | 32 KB | 8 KB | 32 KB | 32 KB |
| Core Frequency | 50 MHz | 50 MHz | 50 MHz | 80 MHz | 50 MHz | 50 MHz |
| USB | USB 2.0 Full-Speed OTG | USB 2.0 Full-Speed OTG | USB 2.0 Full-Speed OTG | No USB | No USB | USB 2.0 Full-Speed OTG |
| CAN | CAN 2.0B with DeviceNet | CAN 2.0B with DeviceNet | CAN 2.0B with DeviceNet | CAN 2.0B with DeviceNet | CAN 2.0B with DeviceNet | CAN 2.0B with DeviceNet |
| Temperature Grade | -40C to +105C (V) | -40C to +105C (V) | -40C to +85C (I) | -40C to +105C (V) | -40C to +105C (V) | -40C to +105C (V) |
主要差異化特點
- Higher Flash density in 100-pin TQFP (對比PIC32MX534F064L-V/PF)
- Integrated USB OTG controller (對比PIC32MX450F256L-V/PF)
- Wider industrial temperature range (對比PIC32MX550F256L-50I/PF)
設計說明
The PIC32MX550F256L-V/PF operates from 2.3V to 3.6V and requires multiple bulk decoupling capacitors on each VDD/VSS pair. Per the Microchip datasheet section on Power Requirements, place one 0.1 uF ceramic capacitor within 5 mm of every VDD pin (the 100-pin TQFP has VDD on pins 22, 32, 49, 66, 87, 88), plus a 10 uF tantalum bulk capacitor near the MCU. For USB applications, the VBUS pin (RB5) needs a 1 uF capacitor and the internal voltage regulator requires VDD/VBUSON handling for USB self-powered setups.
The PIC32MX550F256L-V/PF in 100-pin TQFP has a junction-to-ambient thermal resistance of approximately 50 C/W, so at 50 MHz full activity with all peripherals active, the die dissipates well under 100 mW and no heatsink is required. Estimated: at 70 mA active current at 3.3V, the chip dissipates 0.23 W, yielding roughly 12 C junction rise above 25 C ambient - well within the -40C to +105C operating range.
Route the USB D+ (RG2) and D- (RG3) differential pair with 90 ohm differential impedance and equal trace lengths within 2 mm of each other to comply with USB 2.0 Full-Speed signal-integrity requirements. Place the 12 MHz (or 8 MHz depending on PLL) crystal close to the OSC1/OSC2 pins with matching-trace layout, and add 22 pF load capacitors to ground. The PMP data bus (RD0-RD7, RD8-RD15) should be routed as byte-aligned matched traces to the LCD connector.
Common mistakes with the PIC32MX550F256L-V/PF include forgetting the ICSP programming connections (PGED1/PGEC1 on RG13/RG14), failing to set the correct PLL configuration for 50 MHz from an external 8 MHz crystal, and overlooking the VBUS-on handling required when running USB in self-powered mode. Also verify that the JTAG TMS/TCK pins (RA0/RA1) are not pulled low at reset if JTAG is not used. Programming requires a Microchip PICkit, ICD, or MPLAB Snap debugger.
合規資訊
RoHS compliant per Microchip product page. Standard V-temp variant is not AEC-Q100 qualified - look at PIC32MX5xx Q-grade parts for automotive.
