Ambiq® introduces the latest addition to the Apollo4 SoC family, the fourth generation of SPOT-enabled SoCs. Built on a rich architecture that integrates low power Bluetooth® Low Energy 5.4, the Apollo4 Blue Plus brings enhanced graphics performance, better security, and additional on-chip memory. With a built-in graphics processing unit (GPU) and a high performing display driver, Apollo4 Blue Plus enables designers of next generation wearables and smart devices to deliver even more stunning user interface (UI) effects and overall user experience. 

Apollo4 Blue Plus Datasheet
AmbiqSuite SDK 4.5.0
Apollo4 Family SDK Getting Started Guide
Apollo4 Family Programmer's Guide
Apollo4 Blue Plus KBR EVB Quick Start Guide v1.3
Apollo4 Blue Plus KXR EVB Quick Start Guide v1.3