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The Goodix GR5525 series is a comprehensive-performance single-mode Bluetooth LE 5.3 SoC designed to deliver outstanding performance. Built upon various technology advantages and new features, it can be flexibly configured as a Broadcaster, an Observer, a Peripheral, or a Central. Moreover, it supports the flexible combination of all the above roles, making it an ideal choice for Internet of Things (IoT) and smart wearable devices. Based on ARM ® Cortex ® -M4F CPU core, the GR5525 series integrates Bluetooth 5.3 Protocol Stack, a 2.4 GHz RF transceiver, on-chip programmable Flash memory, RAM, and multiple peripherals. It provides up to four I2C/UART interfaces, expands the I/O functionality, and enhances the QSPI interface, covering a wider range of IoT and wearable applications.