PIC32MX340F256H-80V/PT - 32-Bit 80MHz 256KB Flash MCU | Microchip
MPN: PIC32MX340F256H-80V/PT ✓ פעילPIC32MX340F256H-80V/PT סקירה
A 32-bit microcontroller (MCU) is an integrated processor with a 32-bit data path, on-chip Flash program memory, RAM, and configurable peripherals such as ADC, timers, and communication interfaces. Within the embedded hierarchy, the PIC32MX sits between 8/16-bit MCUs and Cortex-M4 cores, delivering higher performance while retaining deterministic interrupt behavior. The PIC32MX3xx/4xx family is widely used in consumer, industrial, and USB-enabled applications where MIPS instruction-set familiarity and MPLAB X toolchain support matter.
Key features of the PIC32MX340F256H-80V/PT include 256KB (256K x 8) Flash program memory, 32KB (32K x 8) RAM, DMA controller for CPU-offload data movement, and integrated USB 2.0 full-speed device/host/OTG. The device provides 53 general-purpose I/O, multiple UART/SPI/I2C interfaces, a 10-bit 1 Msps ADC, and a parallel master port for external memory. Code protection, JTAG boundary scan, and trace support enable robust debugging.
Architecturally, the PIC32MX340F256H uses the MIPS32 M4K core with 5-stage pipeline, hardware multiply/divide, and a prefetch cache. The internal oscillator and PLL allow flexible clocking up to 80 MHz. Compared to PIC24/dsPIC parts, the PIC32MX340F256H delivers significantly higher Dhrystone MIPS (∼1.5 DMIPS/MHz) while sharing peripheral IP, easing migration from 16-bit designs.
Typical applications include USB peripherals (HID, CDC, mass storage), industrial control panels, graphical user interfaces with parallel-port LCDs, and consumer audio/automation hubs. The wide peripheral mix and DMA support also make it suitable for data-acquisition front ends and embedded web servers.
When designing with the -80V grade (operating -40C to +105C), reserve ample Flash/RAM headroom for USB stacks (typically 30-40 KB). Always provide a stable 3.3V rail with at least 100 mA headroom and place decoupling capacitors close to the VDD/VSS pins per the datasheet layout guide.
This page synthesizes distributor pricing, drop-in alternatives from the PIC32MX family, and practical design notes not found on the manufacturer datasheet alone.
חלופות תחליף ישיר עבור PIC32MX340F256H-80V/PT — אותו מארז, תואם פין-לפין. חלקים במארז שונה הדורשים עיבוד מחדש של ה-PCB אינם נכללים.
וריאנטים בסדרה זו
דגמים מאותה סדרה התואמים Drop-in עם PIC32MX340F256H-80V/PT (אותו גורם צורה וטביעת רגל) — שונים ב ADC, Package, Operating Temperature, DMA Channels, USB.
PIC32MX340F256H-80I/PT
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
PIC32MX340F256HT-80V/PT
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
PIC32MX340F128H-80I/PT
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←PIC32MX340F128HT-80V/PT
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←PIC32MX340F128H-80V/MR
✅ Drop-In ⚠️ מפרטים לא מאומתיםצור קשר לקבלת מחיר
הצג גיליון נתונים ←PIC32MX340F256H-80V/PT דירוגים מרביים ומאפיינים חשמליים
| Core Architecture | MIPS32 M4K |
| רוחב אפיק נתונים | 32-bit |
| Program Memory (Flash) | 256 KB (256K x 8) |
| RAM Size | 32 KB (32K x 8) |
| Maximum CPU Frequency | 80 MHz |
| Supply Voltage (VDD) | 2.3 V to 3.6 V |
| Number of I/O Pins | 53 |
| ADC | 10-bit, 1 Msps |
| מארז | 64-pin TQFP (10x10x1 mm) |
| סוג הרכבה | Surface Mount |
| טמפרטורת פעולה | -40C to +105C (-80V grade) |
| DMA Channels | Yes |
| USB Interface | USB 2.0 Full-Speed Device/Host/OTG |
| Communication Interfaces | UART, SPI, I2C, PMP |
| סטטוס RoHS | Compliant |
תצורת פינים של PIC32MX340F256H-80V/PT
| פין 1 | RP15/PMPDO/RD4 — I/O port D4 / Parallel Master Port data |
| פין 2 | RP14/PMPD1/RD5 — I/O port D5 / PMP data |
| פין 3 | RP13/PMD2/RD6 — I/O port D6 / PMP data |
| פין 4 | RP12/PMD3/RD7 — I/O port D7 / PMP data |
| פין 5 | RP11/PMD4/RD8 — I/O port D8 / PMP data |
| פין 6 | RP10/PMD5/RD9 — I/O port D9 / PMP data |
| פין 7 | RP9/PMD6/RD10 — I/O port D10 / PMP data |
| פין 8 | RP8/PMD7/RD11 — I/O port D11 / PMP data |
| פין 9 | VSS — Ground reference |
| פין 10 | VDD — Positive supply (2.3V-3.6V) |
| פין 11 | RP7/PMD8/RD0 — I/O port D0 / PMP data |
| פין 12 | RP6/PMD9/RD1 — I/O port D1 / PMP data |
| פין 13 | RP5/PMD10/RD2 — I/O port D2 / PMP data |
| פין 14 | RP4/PMD11/RD3 — I/O port D3 / PMP data |
| פין 15 | VCAP — Voltage regulator bypass capacitor (4.7uF to VSS) |
| פין 16 | PGEC2/RP3/RB3 — I/O port B3 / ICSP clock |
| פין 17 | PGED2/RP2/RB2 — I/O port B2 / ICSP data |
| פין 18 | PGEC1/RP1/RB1 — I/O port B1 / ICSP clock |
| פין 19 | PGED1/RP0/RB0 — I/O port B0 / ICSP data |
| פין 20 | VSS — Ground reference |
| פין 21 | VDD — Positive supply (2.3V-3.6V) |
| פין 22 | AN12/RP28/RB12 — Analog input 12 / I/O port B12 |
| פין 23 | AN11/RP27/RB11 — Analog input 11 / I/O port B11 |
| פין 24 | AN10/RP26/RB10 — Analog input 10 / I/O port B10 |
| פין 25 | AN9/RP25/RB9 — Analog input 9 / I/O port B9 |
| פין 26 | AN8/RP24/RB8 — Analog input 8 / I/O port B8 |
| פין 27 | AN7/RP23/RB7 — Analog input 7 / I/O port B7 |
| פין 28 | AN6/RP22/RB6 — Analog input 6 / I/O port B6 |
| פין 29 | AN5/RP21/RB5 — Analog input 5 / I/O port B5 |
| פין 30 | AN4/RP20/RB4 — Analog input 4 / I/O port B4 |
| פין 31 | AVSS — Analog ground |
| פין 32 | AVDD — Analog supply (2.3V-3.6V) |
| פין 33 | AN3/RP19/RB3 — Analog input 3 / I/O port B3 (alt) |
| פין 34 | AN2/RP18/RB2 — Analog input 2 / I/O port B2 (alt) |
| פין 35 | AN1/RP17/RB1 — Analog input 1 / I/O port B1 (alt) |
| פין 36 | AN0/RP16/RB0 — Analog input 0 / I/O port B0 (alt) |
| פין 37 | VREF-/CVREF-/AN15 — ADC negative reference / analog input 15 |
| פין 38 | VREF+/CVREF+/AN14 — ADC positive reference / analog input 14 |
| פין 39 | SDA1/RP9/RD9 — I2C data 1 / I/O port D9 |
| פין 40 | SCL1/RP8/RD8 — I2C clock 1 / I/O port D8 |
| פין 41 | SOSCI/RP13/RB13 — Secondary oscillator input / I/O port B13 |
| פין 42 | SOSCO/RP14/RB14 — Secondary oscillator output / I/O port B14 |
| פין 43 | D-/RG3 — USB D- data line |
| פין 44 | D+/RG2 — USB D+ data line |
| פין 45 | VUSB — USB transceiver supply (3.3V) |
| פין 46 | OSC1/RC12 — Primary oscillator input |
| פין 47 | OSC2/RC15 — Primary oscillator output |
| פין 48 | VSS — Ground reference |
| פין 49 | TDI/RPA8/RA8 — JTAG test data in / I/O port A8 |
| פין 50 | TCK/RPA9/RA9 — JTAG test clock / I/O port A9 |
| פין 51 | TDO/RPA10/RA10 — JTAG test data out / I/O port A10 |
| פין 52 | TMS/RPA7/RA7 — JTAG test mode select / I/O port A7 |
| פין 53 | TRST/RPA6/RA6 — JTAG test reset / I/O port A6 |
| פין 54 | U1RTS/RF13/RF13 — UART1 RTS / I/O port F13 |
| פין 55 | U1RX/RF12/RF12 — UART1 RX / I/O port F12 |
| פין 56 | U1TX/RF8/RF8 — UART1 TX / I/O port F8 |
| פין 57 | U1CTS/RF5/RF5 — UART1 CTS / I/O port F5 |
| פין 58 | PMCS1/RG1/RG1 — PMP chip select 1 / I/O port G1 |
| פין 59 | PMCS2/RG0/RG0 — PMP chip select 2 / I/O port G0 |
| פין 60 | PMWR/RG7/RG7 — PMP write strobe / I/O port G7 |
| פין 61 | PMRD/RG6/RG6 — PMP read strobe / I/O port G6 |
| פין 62 | PMA0/RE8/RE8 — PMP address 0 / I/O port E8 |
| פין 63 | PMALL/RG15/RG15 — PMP address latch low / I/O port G15 |
| פין 64 | PMALH/RG14/RG14 — PMP address latch high / I/O port G14 |
יישומים טיפוסיים
PIC32MX340F256H-80V/PT מתאים עבור 6 יישוםs: USB Human Interface Device (HID) Peripherals, Industrial Control Panel with Graphical LCD, USB-to-UART / USB-to-SPI Bridge Adapter, Data Acquisition Front End, Consumer Audio / Automation Hub, Embedded Web Server / IoT Gateway.
USB Human Interface Device (HID) Peripherals
The PIC32MX340F256H-80V/PT's integrated USB 2.0 full-speed controller and 256 KB Flash make it a strong fit for USB HID products such as keyboards, mice, gamepads, and custom input devices. The MCU's 80 MHz M4K core handles HID report parsing, debounce, and lighting effects at low CPU load, while 32 KB RAM comfortably buffers multi-endpoint traffic. Place a 1.5 kohm pull-up on D+ for full-speed enumeration; the on-chip transceiver eliminates external USB PHY cost. Firmware footprint for a typical composite HID is 30-45 KB Flash, leaving ample headroom in 256 KB.
מומלץ
Industrial Control Panel with Graphical LCD
With 53 I/Os and a parallel master port (PMP), the PIC32MX340F256H-80V/PT directly drives graphical LCDs up to QVGA resolution without external controllers. The 80 MHz core renders menus, fonts, and bitmaps at smooth frame rates while DMA offloads PMP pixel transfers. The 2.3-3.6 V supply range tolerates noisy 24V industrial rails stepped down through a linear or buck regulator. The -105C temperature grade supports outdoor panels and factory floors. Use the internal RTCC for time-stamped event logging.
מומלץ
USB-to-UART / USB-to-SPI Bridge Adapter
The PIC32MX340F256H-80V/PT's USB device stack plus its multiple UART, SPI, and I2C peripherals make it ideal for compact USB bridge adapters used in factory programming and debug fixtures. The MCU emulates common bridge protocols (CDC ACM, vendor-class bulk) while exposing up to 4 UART/SPI ports to the host side. Bus-powered designs are simple because the part draws under 50 mA at 80 MHz. Flash headroom supports dual-role firmware, allowing field upgrade via USB DFU without external programmer.
מומלץ
Data Acquisition Front End
The 10-bit 1 Msps ADC, DMA controller, and 256 KB Flash position the PIC32MX340F256H-80V/PT as a competent multi-channel data logger. The 32 KB RAM buffers 16 ksamples at full ADC throughput, while DMA streams conversions to RAM without CPU intervention, leaving the M4K core free for averaging, peak detection, and SD card writes. Reference designs use the parallel master port with external SRAM for longer captures. The wide -40C to +105C range supports chassis-mounted instrumentation.
מומלץ
Consumer Audio / Automation Hub
The PIC32MX340F256H-80V/PT runs custom audio decoding (MP3, AAC, ADPCM) and home automation stacks simultaneously, leveraging its 80 MHz CPU for software codecs and ample Flash for protocol firmware (Zigbee, BLE-via-host, Modbus). The I2S peripheral can drive external DACs for compact speaker designs. Five UART channels handle concurrent RS-485, RS-232, and DMX links. Cost-optimized designs skip external RAM by using the 32 KB on-chip SRAM for ping-pong audio buffers.
מומלץ
Embedded Web Server / IoT Gateway
The PIC32MX340F256H-80V/PT's TCP/IP stack support (via Microchip's MPLAB Harmony Net Service) and 80 MHz CPU enable lightweight HTTP/MQTT servers on the MCU itself. The 256 KB Flash accommodates the TCP/IP stack plus a small web UI; 32 KB RAM supports several concurrent sockets. The USB host port allows Wi-Fi dongles for wireless connectivity. Engineers often pair this MCU with an external Ethernet PHY for wired IoT bridges.
מומלץ
סיכום מוצרים מומלצים
נתוני עזר הנדסיים עבור PIC32MX340F256H-80V/PT — השוואה, הנחיות תכנון ומידע על תאימות.
מדריך בחירה
השוואה עם חלופות
| פרמטר | מוצר זה | PIC32MX340F256H-80I/PT | PIC32MX340F256HT-80V/PT | PIC32MX340F128H-80I/PT | PIC32MX340F128HT-80V/PT |
|---|---|---|---|---|---|
| Package | 64-pin TQFP (10x10x1 mm) | 64-pin TQFP - same | 64-pin TQFP - same | 64-pin TQFP - same | 64-pin TQFP - same |
| Brand | Microchip Technology | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same |
| Flash Memory | 256 KB | 256 KB (same) | 256 KB (same) | 128 KB (-50%) | 128 KB (-50%) |
| RAM Size | 32 KB | 32 KB (same) | 32 KB (same) | 32 KB (same) | 32 KB (same) |
| Max CPU Frequency | 80 MHz | 80 MHz (same) | 80 MHz (same) | 80 MHz (same) | 80 MHz (same) |
| Operating Temperature | -40C to +105C | -40C to +85C (-20C upper limit) | -40C to +105C (same) | -40C to +85C | -40C to +105C |
| USB 2.0 FS | Yes (device/host/OTG) | Yes (same) | Yes (same) | Yes (same) | Yes (same) |
| Unit Price (1000-pc reel) | $4.40 | $4.20 (approx) | $4.40 (same) | $3.80 (approx) | $3.80 (approx) |
מבדילים עיקריים
- Extended temperature range (-40C to +105C) over the -I grade counterpart (לעומתPIC32MX340F256H-80I/PT)
- Reel packaging variant available with same die (לעומתPIC32MX340F256HT-80V/PT)
- Full 256 KB Flash at same package, lower price tier (לעומתPIC32MX340F128H-80V/PT)
הערות תכנון
Estimated: at 80 MHz with full USB activity, the PIC32MX340F256H draws approximately 50-70 mA from a 3.3 V rail. Provide a 3.3V LDO with at least 100 mA headroom and a 10 uF bulk capacitor near the VDD pins. The VCAP pin (pin 15) requires a 4.7 uF low-ESR ceramic bypass capacitor to VSS to stabilize the internal 1.8V core regulator; do not omit this part or the MCU will brown-out under high CPU load.
Keep USB D+/D- traces matched within 2 mm length difference and 90 ohm differential impedance per USB 2.0 FS spec. Place the 15 kohm pull-down resistors on D+/D- close to the MCU pins. Decouple each VDD pin with a 0.1 uF X7R ceramic placed within 3 mm, plus one 10 uF bulk per supply domain. Route crystal traces (OSC1/OSC2) short and ground-guarded to avoid EMI.
Do not skip configuring the peripheral pin select (PPS) registers in firmware - many pins default to general-purpose I/O and require explicit PPS mapping to peripheral functions. Reserve roughly 30-40 KB Flash for the USB stack when using the Microchip USB framework. The VUSB pin (45) requires a 0.47 uF decoupling capacitor; without it, USB enumeration may fail intermittently.
מידע על תאימות
RoHS compliant per Microchip product page and DigiKey listing. Not AEC-Q100 qualified - this part targets industrial rather than automotive-grade applications. Lead-free matte-tin finish per JEDEC J-STD-020.
