PIC32MX270F512HT-50I/PT
PIC32MX270F512HT-50I/PT - 50MHz 32-bit MCU, 512KB Flash | Microchip
The Microchip PIC32MX270F512HT-50I/PT is a 32-bit MIPS M4K microcontroller running at 50 MHz delivering 83 DMIPS, integrating 512 KB of Flash and 64 KB of SRAM in a 64-pin TQFP (10x10 mm) package with industrial -40C to +85C temperature range. The 'H' family designation exposes up to 50 GPIO lines, two I2S audio interfaces, four SPI/I2S modules, USB 2.0 full-speed device/host/OTG, a 10-bit 1 MSPS ADC with 28 channels, and the flexible Peripheral Pin Select (PPS) remapping engine.
A 32-bit microcontroller (MCU) is an embedded processor that integrates CPU core, program Flash, data SRAM, and a wide range of peripherals on a single silicon die, replacing discrete logic blocks and enabling compact, low-power connected designs. Within the broader embedded hierarchy, a 32-bit MCU sits between 8/16-bit microcontrollers (lower code density, simpler peripherals) and application processors (higher clock, MMU, Linux-capable). The PIC32MX270 specifically belongs to the MIPS M4K core family, which is widely adopted in audio, USB, and graphics interface designs because of its deterministic interrupt latency and DSP-like multiply/divide throughput.
Key features include Peripheral Pin Select for flexible peripheral-to-pin mapping, a Parallel Master Port (PMP) with dual read/write buffers aimed at TFT/graphical LCD interfacing, dual I2S modules enabling direct connection to stereo DACs and ADCs, an on-chip full-speed USB 2.0 controller with internal transceiver, and a 10-bit 1 MSPS ADC that supports up to 28 analog input channels. The PPS engine allows remapping of digital peripherals (UART, SPI, I2C, etc.) to most general-purpose I/O pins, simplifying PCB layout.
Architecturally, the PIC32MX270 employs a five-stage pipeline MIPS32 M4K core with single-cycle multiplication, hardware multiply-accumulate, and zero-wait-state Flash access via an internal 128-bit wide prefetch buffer, delivering 1.65 DMIPS/MHz. The USB 2.0 full-speed controller with internal PHY eliminates external transceivers, and the PMP module accelerates PFS by 65% over software-driven bit-banging for TFT displays. The 64 KB SRAM is partitioned for general-purpose use with configurable DMA paths to peripherals.
Typical applications include USB audio streaming devices (USB speakers, headsets, USB microphones), small graphical HMI with TFT displays driven by PMP, embedded web servers with TCP/IP stacks on USB or UART, industrial control scanners and instrumentation, and low-cost graphics terminals for industrial automation.
When designing with the PIC32MX270, plan decoupling around the 2.5V internal regulator: place 10uF + 0.1uF close to VDDCORE/VDD pins, and tie VBUS through a 10kOhm pull-down when used in self-powered USB configurations.
This page synthesizes cross-brand distributor pricing, drop-in alternatives, and practical design notes (PPS, PMP, USB bootstrap) not aggregated on the manufacturer datasheet.
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