Bluetooth 5.2 Wireless MCU RSL15
RSL15 is an ultra−low power secure Arm® Cortex®−M33 processor−based Bluetooth Low Energy 5.2 wireless MCU designed for connected smart devices in industrial and medical applications.

RSL15 is an ultra−low power secure Arm® Cortex®−M33 processor−based Bluetooth Low Energy 5.2 wireless MCU designed for connected smart devices in industrial and medical applications.
The comprehensive, yet easy−to−use Software Development Kit (SDK) provides sample applications that demonstrate the hardware capabilities to enable security with the Cybersecurity Platform,acquire sensor data in Smart Sense mode, configure the built−in power management and utilize Bluetooth Low Energy features.
Features
Bluetooth Low Energy 5.2 Certified with key features:
- Up to 10 simultaneous connections
- Long Range (Coded PHY)
- 2 Mbit PHY (High Speed)
- Angle of Arrival (AoA) and Angle of Departure (AoD)
- Extended Advertising
- Backwards compatibility and support for earlier Bluetooth Low Energy specifications including 5.1, 5.0, 4.2, 4.1 and 4.0
Ultra−low power operation:
- Sleep Mode (GPIO Wakeup) @ 3 V VBAT: 36 nA
- Sleep Mode (Crystal Oscillator, RTC Timer Wakeup) @ 3 V VBAT: 57 nA
- Smart Sense Mode allows some digital and analog peripherals to remain active to monitor and acquire data from external sensors at a very low system−level power consumption
- Continuous ADC operation in Smart Sense Mode with wakeup on ADC threshold @ 3 V VBAT: 206 nA
- Peak Rx Current 1 Mbps @ 3 V VBAT: 2.7 mA
- Peak Tx Current 0 dBm Output Power @ 3 V VBAT: 4.3 mA
- Non−Connectable Advertising at 5 s Intervals @ 3 V VBAT: 1.1 μA (Average)
- Connectable Advertising at 5 s Intervals @ 3 V VBAT: 1.3 μA (Average)
Rx Sensitivity (BLE Mode, 1 Mbps): −96 dBm
Rx Sensitivity (BLE Mode, 2 Mbps): −94 dBm
Configurable Tx Power: −17 dBm to +6 dBm
Data Rate of 62.5 kbps to 2000 kbps
Arm Cortex−M33 processor clocked up to 48 MHz
- Cybersecurity Platform with Arm CryptoCell™−312 for End−to−end Product Security with Secure Boot, Root of Trust, Lifecycle Management, Secure Key Management, and Application and Data Security
Arm TrustZone® to enable secure execution zones
Two flash memory sizes available, 284 KB Flash (QFN only) or 512 KB Flash
80 KB RAM (64 KB user RAM, 16 KB RAM for Baseband)
Flexible Power Management:
- 1.2 V – 3.6 V VBAT.
- Directly connect 1.5 V silver−oxide or 3 V coin cells without any external active components
Two SPI ports with QSPI capability
Applications
- Connected Devices
- Smart Building
- Smart Industry
- Smart Home
- Smart City
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RSL15 Detailed Block Diagram

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