Dual-core architecture — what the 204 MHz buys you
The LPC4322JBD144551 pairs an ARM Cortex-M4 running at 204 MHz with a Cortex-M0+ core on the same die. The M4 handles the math-heavy control loop — motor FOC, sensor fusion, or protocol stack — while the M0+ offloads housekeeping like I²C polling, UART framing, or wake-up sequencing. That split keeps the main loop deterministic without a separate CPLD or small MCU for glue logic.
Memory budget for a motor-drive or HMI BOM
512 KB of flash and 104 KB of SRAM are sized for a single motor-control firmware image with CANopen stack and a modest HMI page buffer. The 16 KB EEPROM block holds calibration constants and fault logs without external serial EEPROM.
Peripheral set for industrial connectivity
Two CANbus controllers, USB OTG with host/device capability, and a motor-control PWM timer with dead-time insertion cover the typical drive and gateway I/O. The EBI/EMI bus can connect external SRAM, NOR flash, or an FPGA for custom logic expansion. 83 GPIOs leave headroom for a keypad, encoder inputs, and status LEDs without a port expander.