PIC32MX230F128HT-I/PT
PIC32MX230F128HT-I/PT - 32-bit 50MHz 128KB Flash MCU | Microchip
The Microchip Technology PIC32MX230F128HT-I/PT is a 32-bit MIPS32 M4K microcontroller operating at up to 50 MHz with 128 KB of Flash program memory and 16 KB of SRAM, packaged in a 64-pin TQFP (10x10 mm). It integrates a full-speed USB 2.0 device/host/OTG controller, a 10-bit 1 Msps ADC with up to 28 channels, two I2S/SPI audio interfaces, a capacitive touch (CTMU) peripheral, and a Real-Time Clock Calendar (RTCC) module. The 'T' suffix denotes the tape-and-reel packaging option, while '-I/PT' indicates the industrial temperature grade (-40C to +85C) and 64-pin TQFP package.
A 32-bit microcontroller is an integrated circuit combining a 32-bit CPU core, program memory (Flash), data memory (SRAM), and configurable peripherals on a single silicon die. Within the broader taxonomy, this places the part as a microcontroller -> embedded processor -> system-on-chip (SoC) -> semiconductor IC. The PIC32MX family specifically targets cost-sensitive embedded applications that require USB connectivity, digital audio, and human-machine interface (HMI) features without the overhead of higher-end Cortex-M parts.
Key features include a 1.25 DMIPS/MHz MIPS32 M4K core, single-cycle multiplication and division, a 5-stage pipeline, and up to 51 GPIO pins. The device also includes three SPI/I2S modules, two UART modules, two I2C modules, five 16-bit timers/counters, and a 16-channel DMA controller. An 8-bit Parallel Master Port (PMP) supports external memory or graphics displays. The internal 8 MHz Fast RC oscillator with PLL provides flexible clocking, and an on-chip LDO regulator simplifies single-rail 2.5 V/3.3 V designs.
The architecture uses a Harvard-style bus with separate Flash and SRAM buses, enabling simultaneous instruction fetch and data access for predictable interrupt latency. The USB 2.0 full-speed PHY is integrated on-chip, eliminating external transceiver components. The CTMU peripheral enables capacitive touch sensing for buttons, sliders, and proximity detection, while the RTCC maintains accurate timekeeping with backup battery domain. The 10-bit ADC with DMA support enables high-throughput sensor sampling at up to 1 Msps.
Typical applications include USB peripherals (HID, CDC, mass storage), consumer audio products (MP3 players, headphones, soundbars), home appliances with capacitive touch user interfaces, industrial control panels, medical monitoring devices, and low-cost HMI designs with graphics LCD support. The combination of USB, CTMU, and I2S makes it particularly suited for connected audio appliances and USB-charging smart-home hubs.
When designing with this part, allocate PCB footprint for the 10x10 mm TQFP body with 0.5 mm pitch and ensure the USB D+/D- traces are routed as a 90 ohm differential pair. Decouple VDD with 100 nF and 4.7 uF capacitors placed within 3 mm of each supply pin, and provide a 4.7 kohm pull-up on D+ for full-speed USB enumeration.
This page synthesizes distributor pricing, verified drop-in alternatives from the same PIC32MX family, and practical PCB design notes not found in the manufacturer datasheet alone.
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