Ambiq Apollo4 Blue Plus KXR Evaluation Board is based on the AMA4BKP-KXR SoC and includes a HexSPI interface for faster access to PSRAM or other external memory for richer graphics. The AMA4BKP-KXR SoC allows next-generation wearables and smart device designers to create more stunning user interface (Ul) effects and overall user experience. The SoC is engineered upon Ambiq’s proprietary Subthreshold Power-Optimized Technology (SPOT®) platform.