96 MHz Cortex-M33 with 128 KB Flash — fit for real-time control
The NXP LPC5504JBD64E is a 32-bit ARM Cortex-M33 MCU from the LPC550x series, clocked at 96 MHz single-core. It carries 128 KB of Flash and 80 KB of RAM — enough headroom for a modest firmware stack with a CANopen or Modbus RTU protocol layer, plus local data logging. The 45 I/O lines include a dedicated Flex COMM interface that can be configured as SPI, I2C, UART, or I2S without external muxing, which simplifies the BOM for a multi-protocol fieldbus node.
The 64-HTQFP package with exposed pad helps pull heat into the PCB ground plane — useful when the core is running continuous ADC conversions at 96 MHz.
Peripherals that reduce external component count
The internal oscillator keeps the design running without an external crystal for non-critical timing, though the Flex COMM and CANbus blocks still benefit from a precision external clock if jitter matters. The 9-channel 16-bit SAR ADC covers analog inputs like thermistor or pressure-sensor conditioning without an external mux.