MEC1705 Embedded Controller Microchip Technology MEC1705 Embedded Controller is a highly-configurable, mixed-signal, advanced I/O controller ideal for embedded and industrial computing platforms. The MEC1705 incorporates 32-bit features and an Arm® Cortex®-M4F Microcontroller core with a closely-coupled SRAM for code and data. A secure bootloader is used to download the custom firmware image from the system’s shared SPI Flash device, allowing system designers to customize the device’s behavior.