Case Study: RTL8762D All-in-One Solution for Bluetooth Fingerprint Recognition

2022/8/29 16:55:19

 

High performance Bluetooth Host Controller Chip

Magic Information is a high-tech enterprise focusing on original AIoT identification technology. The "Magic Pearl" is an all-in-one fingerprint and Bluetooth SoC Turnkey Solution, based on Realtek's RTL8762D, which leverages Bluetooth’s stable wireless transmission, the QFN small package advantage, and the ultra-low power consumption of the RTL8762D. The design can be used as a reference for direct mass production of customer smart locks, or can be reconfigured according to development needs. In addition, MagicInfo's 6th generation fingerprint recognition intelligent self-learning algorithm supports all kinds of mainstream sensors, meaning it can serve as the product's high-performance master chip while also allowing for relatively convenient product installation.

Bluetooth fingerprint recognition products have a long standby time and require low power consumption. The RTL8762D is an ultra-low-power Bluetooth solution with excellent low-power performance. Combined with the all-in-one Magic Pearl Bluetooth fingerprint recognition solution, it can effectively support both ultra-low voltage operations and button battery design.

 

 

Small Size and Wide Range of Application Layers

The Magic Pearl solution is small in size and can be used freely in a 16mm space, so it can be developed for a wide range of applications: Door locks, cabinet locks, drawer locks, U-shaped locks, padlocks, electronic cigarettes, and more. Applications in these size-constrained products still easily fulfills the primary Bluetooth recognition requirements. This solution effectively integrates the three-in-one need for Bluetooth, fingerprinting, and master control, providing the best consumer experience while effectively controlling customer development costs.

Realtek provides Bluetooth chip solutions for a wide variety of product development. We create a flexible and active basis for research and development, with more customized adjustments to meet customer needs. Realtek products are aimed at helping customers create products that maximize value of use. This echoes the Realtek the corporate philosophy of Magic Information: Pursuing products that bring people a safer, more convenient, more intelligent living environment.

RTL8762D

RTL8762D support Bluetooth 5.1,ultra low power consumption, with 90MHz high frequency ARM Cortex-M4 processor,high Flash memory,flexible GPIO design.It is widely used in smart home,Bluetooth Mesh,wearble devices,smart door locks and other products.

  • Supports Bluetooth 5.1 core specification
  • Supports LE 2Mbps
  • LE advertising Extensions
  • LE Long Range
  • High Duty Cycle Non-Connection Advertising
  • Supports OTA(Over-the-Air)
  • Support AoA/AoD
  • ARM Cortex-M4 max frequency 90MHz
  • 192KB SRAM totally
  • Serial Flash Controller(1-bit&4-bits mode)with 16KB 4-way cache
  • Supports AES128/192/256 encryption/decyption engine
  • Flash512KB(RTL8762DGF/DDF/DKF)
  • Flash1024KB(RTL8762DGF-VS/DKF-VS)
  • Tx Power: 0/4/7.5 dBm adjustable(refer to datasheet for details)
  • Rx Sensitivity:-97dBm BLE
  • Fast AGC control to improve receiving dynamic range
  • Flexible GPIO
  • Hardware Keyscan and Quad-decoder
  • Embedded IR transceiver
  • Real-Time Counters(RTC)
  • SPI master/slave x 2;Timers x 8;I2C x 2;PWM x 8;UART x 2
  • 400ksps,12bit,8-channel AUXADC
  • I2S interface for external audio codec
  • I8080 interface for LCD
  • Internal 32K RCOSC to keep BLE link
  • Embedded PGA and audio ADC with 5-band EQ