PIC24FJ256DA106-I/PT
PIC24FJ256DA106-I/PT - 256KB Flash 16-Bit MCU with Graphics | Microchip
The Microchip PIC24FJ256DA106-I/PT is a 16-bit microcontroller from the PIC24F-DA family with integrated graphics acceleration, a display controller, and USB On-The-Go (OTG), packaged in a 64-pin TQFP (10x10 mm). It runs at 32 MHz delivering up to 16 MIPS, integrates 256 KB Flash program memory organized as 85.5K x 24, and is engineered to directly drive displays up to 4.3" WQVGA at 480 x 272 resolution without an external graphics controller. The device is supplied in an industrial-grade -40C to +85C temperature range, denoted by the "/PT" TQFP-64 package code.
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 on one die. The PIC24F family uses a modified Harvard architecture running a 16-bit instruction word with a 16-bit working register array, a 17-bit x 17-bit single-cycle hardware multiplier, and a hardware 16/16-bit divider. The 'DA' sub-family extends the base 'GA' general-purpose line by adding a dedicated graphics display controller, a parallel graphics port (EPMP/GFX), and USB OTG - targeting cost-sensitive graphical HMI products where bill-of-materials pressure rules out an external GPU.
Key features of this device include 256 KB self-programmable Flash with code-guard security, 24 KB SRAM, an 8 MHz internal oscillator with 4x PLL (yielding the 32 MHz CPU clock), a Charge Time Measurement Unit (CTMU) for capacitive touch sensing on up to 64 buttons, Peripheral Pin Select (PPS) that remaps digital peripherals to almost any I/O, and multiple serial interfaces (UART, SPI, I2C). The CTMU and PPS combination is what allows the PIC24FJ256DA106 to replace dedicated touch controllers and external pin-mux chips in cost-optimised designs.
Architecturally the part combines a C-compiler-optimized RISC engine with the EPMP graphics engine, a DMA controller, a 16-bit timer/counter bank, a 10-bit 500 ksps ADC (typically 16 channels on the 64-pin device), and a USB 2.0 full-speed OTG transceiver. The integrated graphics block accelerates line draw, blit, text render, and alpha blending in hardware, offloading the CPU and enabling smooth GUI refresh at 60 Hz on WQVGA panels. The 32 MHz CPU core executes most instructions in one cycle, so the DMA + EPMP pair can sustain pixel throughput without CPU intervention.
Typical applications for the PIC24FJ256DA106-I/PT include low-cost graphical user interfaces on home appliances, white-goods control panels, industrial operator terminals, medical bedside displays, USB-connected point-of-sale terminals, and any embedded product needing a color TFT (up to 4.3" WQVGA) with capacitive touch without paying for a separate graphics controller IC.
When designing with this device, observe Microchip's recommended decoupling (100 nF ceramic on every VDD/VSS pair), keep the PLL filter network short, and reserve a programming/debug pin pair for ICSP. The on-chip 3.3V LDO regulator requires its own bulk capacitor and a ferrite bead if the analog supply is noise-sensitive. For CTMU-based touch, the PCB layout and ground flood directly affect measurement repeatability.
This page synthesizes XAIPART distributor pricing, drop-in TQFP-64 alternatives from the PIC24FJ family, and practical hardware design notes that complement (not duplicate) the manufacturer datasheet.
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