Core parametrics and BOM-fit note
The MCF51JM64VQH runs a ColdFire V1 core at 50 MHz — the 32-bit single-core architecture delivers deterministic interrupt response for real-time control loops without an RTOS overhead penalty. For a typical CAN gateway or USB HID interface, the flash leaves room for a communication stack plus 20-30 KB of application code. Operating temperature is -40 °C to +105 °C (TA), covering the industrial and automotive under-hood ambient range. The 64-QFP package (14x14 mm) with 0.8 mm pitch is layout-friendly on a two-layer board.
Peripheral set and deployment context
Connectivity includes CANbus, I²C, SCI (UART), SPI, and USB OTG — the USB OTG controller supports both device and host modes, making this MCU suitable for a data-logger that offloads to a USB flash drive or a CAN-to-USB gateway. The 12-channel 12-bit ADC (A/D 12x12b) reads analog sensors (temperature, pressure, current sense) without an external converter. Peripherals also include LVD (low-voltage detect), PWM, and WDT — the PWM can drive a small DC motor or LED dimmer directly. 51 general-purpose I/O lines are available; the QFP package routes them to three sides, so a medium-complexity control board with a keypad, LCD, and a few sensor inputs fits without port expansion.