Shown here are the key areas where the RX651/RX65N really shines. First, the dual bank 50 MHz flash memory results in fewer cache misses for better, more predictable performance. As MCUs integrate an increasing number of features, interrupt response time is becoming more and more important. RX651/RX65N blows away the competition, responding to interrupts in as few as 5 cycles vs. 12 for competing MCUs. The Renesas proprietary hardware security IP block provides secure hidden root key storage normally found only in high-priced secure MCUs. Finally, the RX CPU architecture which is a hybrid of CPU/DSP can increase some operations by 10x or more, and the included RX DSP library with many built-in DSP functions has been optimized for RX.