PIC32MX340F128LT-80V/PT - 80MHz 32-bit MCU 128KB Flash | Microchip
MPN： PIC32MX340F128LT-80V/PT ✓ 啟用中PIC32MX340F128LT-80V/PT 概覽
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash), data memory (RAM), and a rich set of peripherals such as timers, ADC, communication interfaces (UART, SPI, I2C), and general-purpose I/O. The PIC32MX3XX/4XX family sits within Microchip's PIC32 portfolio of MIPS-based 32-bit microcontrollers, which bridge the gap between 8/16-bit PIC MCUs and higher-performance ARM Cortex-M parts, targeting cost-sensitive embedded applications that need true 32-bit performance with low power.
Key features of this part include 53 general-purpose I/O pins, a 16-channel 10-bit ADC with up to 500 ksps conversion rate, USB 2.0 full-speed device/host/OTG, two I2C and two SPI interfaces, two UART modules, a 5-stage pipeline with hardware multiply/divide, MIPS16e code compression (up to 40% smaller code), fast interrupt handling, and an on-chip 8 MHz internal oscillator with PLL. The Harvard architecture and 32x32-bit shadow registers enable fast context switching for real-time tasks.
Typical applications include industrial control panels, USB peripherals (HID, CDC, mass storage), home automation gateways, low-cost graphical user interfaces (with external LCD controller), sensor hubs, motor control front-ends, and consumer audio devices. The 80 MHz core plus DMA support also makes it suitable for data-acquisition front-ends where the CPU offloads buffer moves to dedicated channels.
Designers should pay attention to decoupling: place 0.1 uF ceramics on every VDD/AVDD pin pair close to the IC, plus a bulk 10 uF tantalum on the main 3.3 V rail. The USB bus-powered VBUS pin requires a separate regulator since the MCU's internal LDO cannot source the full 500 mA USB enumeration budget. Always use the latest PIC32MX3XX/4XX Family Silicon Errata sheet when validating firmware.
直接替換替代品，適用於 PIC32MX340F128LT-80V/PT — 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： PIC32MX340F128LT-80V/PT （相同外形與佔位） — 差異在於 ADC, DMA Channels, Package, USB, Timers.
PIC32MX340F128L-80V/PT
✅ 直接替換聯絡詢價
查看資料表 →PIC32MX340F128HT-80V/PT
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →PIC32MX270F512LT-V/PT
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
PIC32MX230F128LT-V/PT
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →PIC32MX340F128L-80V/BG
✅ 直接替換聯絡詢價
查看資料表 →PIC32MX340F128LT-80V/PT 最大額定值與電氣特性
| Core Architecture | MIPS32 M4K 32-bit RISC |
| Maximum CPU Frequency | 80 MHz (105 DMIPS) |
| Pipeline Stages | 5-stage with Harvard architecture |
| Program Memory (Flash) | 128 KB (128K x 8) |
| SRAM | 32 KB (32K x 8) |
| General-Purpose I/O | 53 pins |
| ADC | 10-bit, up to 16 channels, 500 ksps |
| USB | USB 2.0 Full-Speed Device/Host/OTG |
| UART Modules | 2 |
| SPI Modules | 2 |
| I2C Modules | 2 |
| DMA Channels | 8 |
| Timers | 5 16-bit timer/counters, 1 16-bit Input Capture, 1 16-bit Output Compare |
| Operating Voltage | 2.3 V to 3.6 V |
| 工作溫度 | -40 C to +105 C |
| 封裝 | 100-pin TQFP (12x12 mm) |
| 安裝類型 | Surface Mount |
| RoHS 狀態 | Compliant |
| Code Compression | MIPS16e mode, up to 40% smaller code size |
| Shadow Registers | 32 x 32-bit for fast context switch |
PIC32MX340F128LT-80V/PT 100-pin tqfp (12x12 mm) 腳位配置指南
PIC32MX340F128LT-80V/PT（100-pin tqfp (12x12 mm) 封裝）的腳位配置。 此數位 IC 包含 GPIO、通訊介面（UART、SPI、I2C）與電源腳位。替代腳位功能與配置選項請參閱製造商資料表。對嵌入式系統設計與 PCB 佈局至關重要。
無詳細腳位定義資料： PIC32MX340F128LT-80V/PT.
請參閱 資料表 以查看完整腳位配置。
典型應用
PIC32MX340F128LT-80V/PT 適用於 6 應用s: Industrial Control Panels, USB HID Peripherals, Home Automation Gateways, Sensor Hub and Data Logger, USB to UART Bridge Module, Consumer Audio and Display Controllers.
Industrial Control Panels
The PIC32MX340F128LT-80V/PT fits industrial HMI and control panels thanks to its 80 MHz MIPS M4K core, 53 GPIO pins, and industrial -40 C to +105 C operating range. The 32 KB SRAM supports small graphical libraries and Modbus RTU buffers while the 128 KB Flash holds firmware for keypad scanning, display driving, and relay logic. Hardware DMA offloads UART traffic without CPU intervention, leaving the core free for control loops. The 16-channel 10-bit ADC reads analog sensors such as temperature, pressure, and current transducers directly, with 500 ksps throughput suitable for vibration monitoring.
推薦
USB HID Peripherals
The PIC32MX340F128LT-80V/PT integrates a USB 2.0 Full-Speed controller with on-chip transceiver, making it ideal for HID peripherals such as keyboards, mice, joysticks, custom input devices, and barcode scanners. The 32 KB SRAM easily accommodates HID report buffers alongside application code, while the 8 DMA channels handle USB endpoint transfers with zero CPU load. Microchip's MLA USB stack provides ready-to-use HID class drivers that port directly to this part. The industrial temperature range and 128 KB Flash support feature-rich composite USB devices combining HID with CDC and vendor interfaces.
推薦
Home Automation Gateways
The PIC32MX340F128LT-80V/PT serves as a central coordinator in home automation gateways by aggregating Zigbee, Z-Wave, or Wi-Fi data via its two UART and two SPI interfaces. The 80 MHz core runs MQTT or CoAP stacks while 32 KB SRAM holds protocol buffers. Its 53 GPIO pins drive status LEDs, button inputs, and configuration switches without external I/O expanders. The 10-bit ADC monitors battery voltage on wireless backup systems. Industrial temperature grade ensures reliable operation in basement and attic installations where temperatures can exceed commercial grade limits.
推薦
Sensor Hub and Data Logger
The PIC32MX340F128LT-80V/PT functions as a sensor hub aggregating I2C sensors, SPI devices, and analog inputs into a single data stream for logging or transmission. Its 16-channel 10-bit ADC reads thermocouples, photodiodes, and strain gauges with up to 500 ksps aggregate throughput. Hardware DMA moves ADC samples to RAM without CPU involvement, enabling continuous sampling while the core compresses and stores data to SD cards via SPI. The 32 KB SRAM buffers several seconds of high-rate samples, while 128 KB Flash holds FAT filesystem and sensor calibration tables.
推薦
USB to UART Bridge Module
The PIC32MX340F128LT-80V/PT creates compact USB-to-UART bridge modules for industrial equipment migration and legacy device connectivity. The integrated USB 2.0 Full-Speed device port enumerates as a CDC class device, while the two on-chip UART modules connect to RS-232, RS-485, or RS-422 transceivers. The 32 KB SRAM handles USB endpoint buffers plus UART FIFOs, and 128 KB Flash stores USB stack, CDC driver, and any protocol translation logic. Industrial -40 C to +105 C temperature range ensures deployment in factory automation cabinets.
推薦
Consumer Audio and Display Controllers
The PIC32MX340F128LT-80V/PT drives small graphical TFT displays in consumer audio products such as portable speakers, headphone amplifiers, and AV receivers. The 80 MHz core drives SPI-based TFTs at full refresh rates, while the two I2C interfaces control audio DACs and EEPROM. The 53 GPIO pins handle rotary encoders, capacitive touch buttons, and LED indicators. With 32 KB RAM and 128 KB Flash, it holds graphics primitives, font tables, and DSP audio processing routines. The MIPS16e code compression mode extends Flash capacity by up to 40% for richer UI features.
推薦
推薦產品摘要
工程參考資料，適用於 PIC32MX340F128LT-80V/PT — 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 | PIC32MX340F128L-80V/PT | PIC32MX340F128HT-80V/PT | PIC32MX270F512LT-V/PT | PIC32MX230F128LT-V/PT |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 100-pin TQFP (12x12 mm) | 100-pin TQFP - same | 100-pin TQFP - same | 100-pin TQFP - same | 100-pin TQFP - same |
| Core | MIPS32 M4K 32-bit | MIPS32 M4K 32-bit | MIPS32 M4K 32-bit | MIPS32 M4K 32-bit | MIPS32 M4K 32-bit |
| Maximum Frequency | 80 MHz | 80 MHz | 80 MHz | 80 MHz | 50 MHz |
| Flash Memory | 128 KB | 128 KB | 128 KB | 512 KB | 128 KB |
| SRAM | 32 KB | 32 KB | 32 KB | 64 KB | 32 KB |
| USB | USB 2.0 FS Device/Host/OTG | USB 2.0 FS Device/Host/OTG | USB 2.0 FS Device/Host/OTG | USB 2.0 FS Device/Host/OTG | USB 2.0 FS Device/Host/OTG |
| Operating Temperature | -40 C to +105 C | -40 C to +105 C | -40 C to +105 C | -40 C to +105 C | -40 C to +105 C |
| Unit Price (qty 100) | $6.05 | $6.05 | $7.20 | $5.40 |
主要差異化特點
- Mature and well-documented USB stack support (對比PIC32MX230F128LT-V/PT)
- Larger Flash capacity for richer firmware (對比PIC32MX230F128LT-V/PT)
- Wide industrial temperature range (對比PIC32MX270F512LT-V/PT)
設計說明
The PIC32MX340F128LT-80V/PT requires a stable 3.3 V supply on VDD/AVDD pins. Place a 0.1 uF ceramic decoupling capacitor on each VDD/AVDD pin pair, located within 3 mm of the pin. Add a bulk 10 uF tantalum or ceramic capacitor on the main 3.3 V rail. The internal voltage regulator output VDDCORE also requires a 10 uF low-ESR capacitor. USB VBUS detection on the VBUS pin requires 5 V tolerance, which this part supports natively.
Route the 80 MHz CPU clock traces with controlled impedance and keep them short. Avoid running digital signal traces parallel to the analog ADC inputs (AN0-AN15) to minimize crosstalk. Place a ground pour on the top layer directly under the TQFP-100 footprint, stitching with multiple vias to the bottom ground plane. Separate analog and digital ground planes if the design uses the ADC at high sample rates, joining them at a single point near the IC's GND pin.
Always consult the latest PIC32MX3XX/4XX Silicon Errata and Data Sheet Clarification document when validating firmware - this family has known errata on USB DMA, I2C slave mode, and ADC CTMU that affect specific use cases. Configure the Configuration Words (DEVCFG0/1/2/3) before any code execution; an unconfigured part may enter unexpected states. Use Microchip's Harmony or MPLAB XC32 toolchain rather than legacy C32 for proper MIPS16e and interrupt handling support.
合規資訊
RoHS and REACH compliance per Microchip product declarations. Industrial temperature grade -40 C to +105 C. Not AEC-Q100 qualified; for automotive applications use PIC32MX variants with the V AEC-Q100 designation.
