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The XY51S03B Bluetooth chip is a new generation of high-performance, ultra-low power consumption Bluetooth 5.1 chips from InnoStar. It uses a 32-bit ARM Cortex-M0 core, with a maximum operating frequency of 64MHz, on-chip integration of 48KB SRAM, and 512KB Flash. Using a 32-bit ARMCortex-M0 core, with a maximum operating frequency of 64MHz, supporting BLE5.1, transmitting current of 4.2mA, receiving current of 3.8mA, maximum transmitting power of+6dBm, and receiving sensitivity -94dBm@BLE1Mbps , supports SIG Mesh. Suitable for various application scenarios such as Bluetooth KEY, OBU, data transmission module, Bluetooth voice remote controller, smart home, etc.

Features
• 32-bit ARM Cortex ®- M0 Core • Main frequency 72MHZ •48KB SRAM工藝技術，512KB Flash • BLE5.1 RF transceiver • Bluetooth BLE5.1 • 1Mbps BLE mode • 2Mbps Enhanced BLE Mode • 125kbps BLE remote mode	• 500kbps BLE remote mode • Support for AOA (angle of arrival) and AOD (departure angle) • Support for RSSI (receiver signal strength indication) • Supports packet length expansion • Support for KEYSCAN, IRC, 10-bit 1.33Msps ADC • Supports analog MIC input, PGA amplification • Support for basic, general, advanced TIMER, RTC, WWDG, IWDG, LPUART, USART, SPI, I2C, and other peripherals
★With high-performance, ultra-low power consumption and other performance characteristics, it has a lower cost advantage and can replace and surpass foreign high-end Bluetooth chips