MAX32665-MAX32668 User Guide
Maxim Integrated Page 426 of 457
22. Bluetooth 5 Low Energy (LE) Radio
Bluetooth 5 Low Energy (LE) radio is the latest version of the Bluetooth wireless communication standard. It is used for
wireless headphones and other audio hardware, as well as for communication between various smart home and Internet of
Things (IoT) devices.
Devices operate in the unlicensed 2.4GHz ISM (Industrial, Scientific, Medical) band. A frequency-hopping transceiver is used
to combat interference and fading. The system operates in the 2.4GHz ISM band at 2400MHz–2483.5MHz. It uses 40 RF
channels. These RF channels have center frequencies 2402 + k x 2MHz, where k = 0, ..., 39.
Bluetooth 5 technology provides:
• 1Mbps, 2Mbps, and Long Range coded (125kbps and 500kbps) data rates
• Increased broadcast capability
• Advertising packet up to 255 bytes
• On-chip matching network to the antenna
• Provides hardware on-the-fly encryption and decryption for lower power consumptionSupports mesh networking
• Supports high-quality audio streaming (isochronous)
• Low-power proprietary mode that supports 20kbps, 40kbps, 500kbps-MSK/GFSK, 1Mpbs-GFSK
22.1 Power-Efficient Design
The provided Bluetooth Low Energy radio is optimized for low-power operation.
• Higher transmit power up to +9.5dbm
• Low transmit current of 2.5mA at 0dbm at 3.3V
• Low receive current of 1.5mA at 3.3V
22.2 Bluetooth Hardware Accelerator
The dedicated Bluetooth hardware accelerator eliminates the need for application software to accommodate the strict
timing requirements and restrictions. It transparently increases system performance while reducing overall power
consumption of the Bluetooth system.
22.3 Arm Cordio®-B50 Software Stack
Maxim provides the Arm Cordio®-B50 stack in library form. This provides application developers access to Bluetooth
without validation and development of a software stack.
The Arm Cordio-B50 software stack interfaces to the Bluetooth link layer running on dedicated hardware. The dedicated
hardware for the stack enables the ultimate in power management for IoT applications.
Cordio is a registered trademark of Arm Limited.
To Next Page
Loading...