PIC32MX120F032BT-I/SO - 32KB Flash 40MHz MCU | Microchip
MPN: PIC32MX120F032BT-I/SO ✓ Hoạt độngPIC32MX120F032BT-I/SO Tóm tắt
A 32-bit microcontroller (MCU) is an integrated circuit that combines a 32-bit CPU core, program memory (Flash), data memory (SRAM), and a rich set of peripherals on a single die. Within the broader hierarchy, PIC32MX devices belong to the PIC family -> 32-bit MCU class -> MIPS-based RISC microcontrollers -> embedded processors. Compared with 8-bit and 16-bit MCUs, 32-bit devices deliver higher MIPS throughput, larger address space, and richer connectivity for IoT, motor control, audio, and graphics user-interface designs.
Key features of the PIC32MX120F032BT-I/SO include 32KB (32K x 8) of self-programmable Flash, 8KB SRAM, Peripheral Pin Select (PPS) for flexible signal routing, two I2S/SPI modules for codec and serial communications, a Parallel Master Port (PMP) for graphics interfaces, a 10-bit Analog-to-Digital Converter with up to 13 channels, five 16-bit timers/counters, and a Charge Time Measurement Unit (CTMU) for mTouch capacitive touch buttons and sliders. Operating voltage is 2.3V to 3.6V with less than 0.5 mA/MHz active current consumption, which suits battery-powered and energy-aware designs.
Internally, the device uses a five-stage pipeline MIPS32 M4K RISC core achieving 1.56 DMIPS/MHz, with hardware multiply/divide and a single-cycle bit manipulation unit. The architecture also includes a prefetch cache controller that hides Flash wait states, allowing sustained 40 MHz core execution with zero Flash wait states using the 128-bit Flash access bus.
Typical applications include consumer electronics with graphical LCDs driven by PMP, USB HID devices (using the on-chip USB 2.0 full-speed transceiver), audio playback modules using I2S to external DACs, low-cost capacitive touch user interfaces, sensor hubs for industrial monitoring, and entry-level 32-bit designs migrating from PIC24 or PIC18 platforms.
When designing with this part, select 3.3V-tolerant peripherals to match the 2.3V-3.6V supply rail and use the PPS feature to remap peripheral functions onto spare I/O pins, simplifying PCB layout. Reserve an unused 32.768 kHz crystal input if RTC timing is desired via Timer1.
This page synthesizes distributor pricing, drop-in same-package alternatives, and design notes for the PIC32MX120F032BT-I/SO that are not consolidated in the manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho PIC32MX120F032BT-I/SO — 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 PIC32MX120F032BT-I/SO (cùng hình factor và footprint) — khác nhau ở Package, ADC, Core Architecture, Operating Temperature, Program Memory (Flash).
PIC32MX120F032BT-50I/SO
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Xem tài liệu →PIC32MX120F032B-I/SO
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Xem tài liệu →PIC32MX110F016B-I/SO
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Xem tài liệu →PIC32MX110F016BT-V/SO
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Xem tài liệu →PIC32MM0032GPL028T-I/SO
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Xem tài liệu →PIC32MX120F032BT-I/SO Tỷ lệ tối đa & tính chất điện
| Core Architecture | MIPS32 M4K |
| Bề rộng đường dữ liệu | 32-bit |
| Maximum Clock Speed | 40 MHz |
| Program Memory (Flash) | 32 KB (32K x 8) |
| RAM | 8 KB |
| Điện áp cung cấp | 2.3 V to 3.6 V |
| I/O Pins | 21 |
| Nhiệt độ hoạt động | -40 C to +85 C (Industrial) |
| Hộp | 28-SOIC (7.50 mm width) |
| Kiểu lắp đặt | Surface Mount |
| Timers | Five 16-bit |
| Communication | 2x I2S/SPI, I2C, UART, USB 2.0 Full-Speed |
| Special Features | Peripheral Pin Select (PPS), Parallel Master Port (PMP), CTMU (mTouch) |
| Active Current | < 0.5 mA / MHz |
| Trạng thái RoHS | Compliant |
Cấu hình chân PIC32MX120F032BT-I/SO
| Chân 1 | MCLR — Master clear (reset) input, active-low; weak pull-up enabled in software |
| Chân 2 | PGED1 — ICSP data line / ICD pin 1 |
| Chân 3 | PGEC1 — ICSP clock line / ICD pin 1 |
| Chân 4 | RB0 — PPS-remappable I/O bit 0 |
| Chân 5 | RB1 — PPS-remappable I/O bit 1 |
| Chân 6 | RB2 — PPS-remappable I/O bit 2 |
| Chân 7 | RB3 — PPS-remappable I/O bit 3 |
| Chân 8 | VSS — Ground reference |
| Chân 9 | RB4 — PPS-remappable I/O bit 4 |
| Chân 10 | RB5 — PPS-remappable I/O bit 5 |
| Chân 11 | RB6 — PPS-remappable I/O bit 6 |
| Chân 12 | RB7 — PPS-remappable I/O bit 7 |
| Chân 13 | VDD — Positive supply input (2.3 V to 3.6 V) |
| Chân 14 | RA0 — PPS-remappable I/O / analog input AN0 |
| Chân 15 | RA1 — PPS-remappable I/O / analog input AN1 |
| Chân 16 | RA2 — PPS-remappable I/O / analog input AN2 |
| Chân 17 | RA3 — PPS-remappable I/O / analog input AN3 |
| Chân 18 | RA4 — PPS-remappable I/O / analog input AN4 |
| Chân 19 | VSS — Ground reference |
| Chân 20 | RA5 — PPS-remappable I/O / analog input AN5 |
| Chân 21 | RA6 — PPS-remappable I/O / analog input AN6 |
| Chân 22 | RA7 — PPS-remappable I/O / analog input AN7 |
| Chân 23 | RB8 — PPS-remappable I/O bit 8 |
| Chân 24 | RB9 — PPS-remappable I/O bit 9 |
| Chân 25 | RB10 — PPS-remappable I/O bit 10 |
| Chân 26 | RB11 — PPS-remappable I/O bit 11 |
| Chân 27 | VBUS — USB bus voltage detect (5 V tolerant) |
| Chân 28 | VDD — Positive supply input (2.3 V to 3.6 V) |
Ứng dụng tiêu biểu
PIC32MX120F032BT-I/SO phù hợp cho 7 Áp dụngs: USB HID / CDC Device, Graphical LCD with PMP, Audio CODEC Interface via I2S, Capacitive Touch User Interface, Industrial Sensor Hub, Consumer Appliance Controller, Migration Path from PIC24 / PIC18.
USB HID / CDC Device
The PIC32MX120F032BT-I/SO integrates a USB 2.0 full-speed device transceiver and dedicated USB PLL, making it a natural fit for HID-class peripherals (keyboards, mice, custom input devices), CDC virtual COM ports, and small vendor-class USB products. The 32 KB Flash is sufficient to host the Microchip Harmony USB stack plus a typical 8-12 KB application layer, while 8 KB SRAM comfortably buffers HID reports and CDC echo data. Drawing under 0.5 mA/MHz active, the part meets USB suspend current budgets when the MCU is clock-gated during enumeration.
Được đề xuất
Graphical LCD with PMP
The on-chip Parallel Master Port (PMP) of the PIC32MX120F032BT-I/SO drives common 8-bit graphical LCD controllers (SSD1963, RA8875) and direct-interface character/graphical displays without an external bus driver. The 32 KB Flash holds a font table plus a UI state machine, and 8 KB SRAM can cache a partial framebuffer for small monochrome OLEDs. PPS lets the designer reassign the PMP data lines to spare I/O to ease PCB routing around connectors and the SOIC-28 footprint.
Được đề xuất
Audio CODEC Interface via I2S
Two on-chip I2S modules let the PIC32MX120F032BT-I/SO bridge external 16/24-bit audio CODECs for playback, recording, or DSP preprocessing. The MIPS32 M4K core at 40 MHz (1.56 DMIPS/MHz) handles a 48 kHz stereo stream plus a small EQ/bi-quad routine while still serving UI tasks on the same die. Hardware DMA offloads sample movement from the core, and the 28-SOIC wide-body package aids thermal dissipation in always-listening voice-front designs.
Được đề xuất
Capacitive Touch User Interface
The integrated CTMU (Charge Time Measurement Unit) on the PIC32MX120F032BT-I/SO supports Microchip mTouch capacitive buttons, sliders, and proximity sensors using only a few passive components per channel. With 21 I/O available on the 28-SOIC variant, the design can host up to 16-18 touch electrodes plus LEDs and serial-comm still link template. Active low-power modes drop current to the microamp range, suiting battery-powered touch remotes, white-goods panels, and appliance front panels.
Được đề xuất
Industrial Sensor Hub
Operating from 2.3-3.6 V at industrial -40 C to +85 C, the PIC32MX120F032BT-I/SO reads analog sensors via its 10-bit ADC, digitizes them, and forwards the data over UART, I2C, or USB to a host PLC or gateway. The 40 MHz MIPS32 M4K core executes simple digital filtering (moving average, thresholding) without breaking a sweat. PPS routing keeps the PCB single-layer for many 4-20 mA loop repeater designs, while the wide 28-SOIC footprint withstands vibration better than fine-pitch QFN alternatives.
Được đề xuất
Consumer Appliance Controller
From coffee machines to air purifiers, the PIC32MX120F032BT-I/SO combines a USB service port for firmware updates, a PMP bus for an LCD, mTouch for buttons/sliders, and a 10-bit ADC for sensor readback, all in one die. The 32 KB Flash is sufficient for menu logic plus USB CDC bootloader, and the 28-SOIC wide-body aids hand-soldering for prototype runs. The 0.5 mA/MHz active current and deep-sleep modes in the microamp range meet energy-star standby budgets for plug-in appliances.
Được đề xuất
Migration Path from PIC24 / PIC18
Teams migrating legacy PIC24FJ or PIC18 designs to a 32-bit MIPS core land naturally on the PIC32MX120F032BT-I/SO. The peripheral register map is similar enough that MPLAB XC32 source code ports with limited effort, and the 28-SOIC footprint is compatible with common PIC24FJ256GA106 and PIC18F46K22 layouts (verify pin-by-pin against your BOM). The PIC32MX120F032BT-I/SO gives 4-8x more DMIPS than an equivalent PIC18 while preserving the 3.3V supply and PPS-style I/O flexibility.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC32MX120F032BT-I/SO — 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 | PIC32MX120F032BT-50I/SO | PIC32MX120F032B-I/SO | PIC32MX110F016B-I/SO | PIC32MX110F016BT-V/SO | PIC32MM0032GPL028T-I/SO |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SOIC (7.50 mm) | 28-SOIC (7.50 mm) - same | 28-SOIC (7.50 mm) - same | 28-SOIC (7.50 mm) - same | 28-SOIC (7.50 mm) - same | 28-SOIC (7.50 mm) - same |
| Maximum Clock Speed | 40 MHz | 50 MHz | 40 MHz | 40 MHz | 40 MHz | 25 MHz |
| Flash Memory | 32 KB | 32 KB | 32 KB | 16 KB | 16 KB | 32 KB |
| SRAM | 8 KB | 8 KB | 8 KB | 4 KB | 4 KB | 8 KB |
| Operating Temperature | -40 C to +85 C (I) | -40 C to +85 C (I) | -40 C to +85 C (I) | -40 C to +85 C (I) | -40 C to +105 C (V) | -40 C to +85 C (I) |
| USB 2.0 FS | Yes (integrated) | Yes | Yes | Yes | Yes | No |
| Parallel Master Port (PMP) | Yes | Yes | Yes | Yes | Yes | Yes |
| CTMU (mTouch) | Yes | Yes | Yes | Yes | Yes | Yes |
| Tape & Reel Packaging | Yes (BT suffix) | Yes | No (tube) | No (tube) | Yes | Yes |
Bảo phân biệt quan trọng
- 50 MHz upgrade option in the same 28-SOIC footprint (vsPIC32MX120F032B-I/SO)
- Larger memory than the PIC32MX110F016B family (vsPIC32MX110F016B-I/SO)
- V-temperature variant for harsher environments (vsPIC32MX110F016BT-V/SO)
- Faster MIPS32 M4K core vs PIC32MM (vsPIC32MM0032GPL028T-I/SO)
Ghi chú thiết kế
Place a 10 uF bulk tantalum or ceramic capacitor plus a 0.1 uF decoupling capacitor within 5 mm of each VDD/VSS pin pair (pins 8/13 and 19/28). The PIC32MX120F032BT-I/SO operates from 2.3 V to 3.6 V; connecting VBUS (pin 27) to the USB VBUS line lets the on-chip USB PHY monitor bus presence. If USB is unused, tie VBUS to VDD through a 10 kOhm resistor to disable the USB module cleanly. The internal voltage regulator requires an external 10 uF capacitor on the VCAP/VDDCORE pin per the datasheet decoupling diagram.
Use a four-layer PCB with a continuous ground plane beneath the SOIC-28 footprint. Route the ICSP lines PGED1/PGEC1 (pins 2/3) directly to an in-circuit debugger header with no series resistors greater than 100 ohms, or debugging will fail. Place the 12 MHz primary oscillator crystal and its load capacitors within 5 mm of OSCI/OSCO. If using PPS, group peripheral signals on contiguous I/O banks to simplify firmware remap tables.
Estimated: Configure the Configuration Word FNOSC field for the desired oscillator source before programming; a missing FNOSC entry on first-power-up will leave the device in an undefined clock state. MCLR (pin 1) MUST NOT be left floating - either tie to VDD through a 10 kOhm pull-up or drive with a supervisor/open-drain reset source. When migrating from PIC24, verify A/D channel mappings: the 28-SOIC PIC32MX120F032B variant exposes 8 analog inputs on RA0-RA7, not the 13 channels listed in the family header.
Thông tin tuân thủ
RoHS and REACH compliance per Microchip product page. The 'I' industrial temperature grade is not AEC-Q100 qualified; select an automotive-grade PIC32 part for vehicle applications.
