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Bluetooth Low Energy is a short-range wireless connection technology featuring high cost efficiency and excellent interoperability. It is widely used in various areas such as mobile devices, IoT, healthcare devices, smart home, and more. Operating on 2.4 GHz ISM radio band with throughput as high as 1.4 Mbps and a transmission range as long as 1,000 meters, Bluetooth Low Energy minimizes power consumption. Moreover, it adopts a complete set of AES-128 encryption technologies, guaranteeing secure data communication.

Bluetooth 5.0

High speed
LE 2M PHY
2x transmission bandwidth of Bluetooth 4.2
Shorter transmission time and lower power consumption
Long range
LE Coded PHY (S2/S8)
4x Range of Bluetooth 4.2
Wider indoor coverage
Large capacity
Over 37 channels for advertising data
8x advertising data capacity of Bluetooth 4.2
More Bluetooth advertising application scenarios

Bluetooth 5.1

New Direction Finding
Supports both Angle of Arrival (AoA) and Angle of Departure (AoD)
Offers a basic framework for Bluetooth indoor location and proximity sensor applications
GATT Caching
Data caching strategy for services, characteristics, and attributes
Conditionally shortens service discovery, saving device power

The GR551x series

The GR551x series chip, launched by Goodix, is a single-mode Bluetooth low energy SoC chip. It can be configured as a Broadcaster, an Observer, a Peripheral and a Central while supporting the use of the combinations of all these roles. The GR551x series chip can be widely used in areas such as IoT and wearable devices.

Chip Series
CPU
RAM
Flash
Package
  • GR5515IGND
    Cortex®-M4F
    256 KB
    1 MB
    QFN56
  • GR5515RGBD *
    Cortex®-M4F
    256 KB
    1 MB
    BGA68
  • GR5515GGBD
    Cortex®-M4F
    256 KB
    1 MB
    BGA55
  • GR5515I0ND
    Cortex®-M4F
    256 KB
    N/A
    QFN56
  • GR5513BEND
    Cortex®-M4F
    128 KB
    512 KB
    QFN40

* Note: The GR5515RGBD is not recommended for new designs

The product portfolio of Goodix Bluetooth LE has a wide range of application in terms of IoT and wearable devices like smart bracelets and watches, Bluetooth mouse, Bluetooth keyboard, active stylus and other products in these areas.

Datasheets

Title
ID
Version
Date
Type
  • GR551x Datasheet
    DS-GR5-00005-EN
    Rev.2.2
    2021-07-30
  • GR551x Datasheet Brief
    DS-GR5-00006-EN
    Rev.1.7
    2021-07-30

Design Files

Title
ID
Version
Date
Type
  • GR551x Hardware Design Guidelines
    DF-GR5-00004-EN
    Rev.2.1
    2021-07-30

User Guides

Title
ID
Version
Date
Type
  • GR551x Developer Guide
    UG-GR5-00029-EN
    Rev.2.3
    2021-07-30
  • GR55xx Bluetooth Low Energy Stack User Guide
    UG-GR5-00028-EN
    Rev.1.7
    2021-07-30
  • GR5515 Starter Kit User Guide
    UG-GR5-00024-EN
    Rev.1.7
    2021-07-30
  • GR551x HAL and LL Drivers User Manual
    UG-GR5-00031-EN
    Rev.1.8
    2021-07-30
  • GR55xx GCC User Manual
    UG-GR5-00033-EN
    Rev.1.9
    2021-07-30
  • GR5515I0ND Flash Selection Guide
    UG-GR5-00037-EN
    Rev.1.1
    2021-07-30
  • GR55xx IAR User Manual
    UG-GR5-00034-EN
    Rev.1.1
    2021-07-30
  • GR551x Peripheral Examples Application Manual
    UG-GR5-00032-EN
    Rev.1.8
    2021-07-30
  • GR55xx Bluetooth Low Energy Examples Application Manual
    UG-GR5-00030-EN
    Rev.1.7
    2021-07-30
  • GProgrammer User Manual
    UG-GR5-00035-EN
    Rev.2.3
    2021-07-30
  • GRSmart User Manual
    UG-GR5-00036-EN
    Rev.2.2
    2021-07-30

Example Files

Title
ID
Version
Date
Type
  • GR55xx Power Consumption Profile Example Application
    EF-GR5-00039-EN
    Rev.2.0
    2021-07-30
  • GR55xx Serial Port Profile Example Application
    EF-GR5-00040-EN
    Rev.1.8
    2021-07-30
  • GR55xx AMS Profile Example Application
    EF-GR5-00033-EN
    Rev.1.7
    2021-07-30
  • GR55xx ANCS Profile Example Application
    EF-GR5-00034-EN
    Rev.1.7
    2021-07-30
  • GR551x OTA Example Application
    EF-GR5-00038-EN
    Rev.1.9
    2021-07-30
  • GR55xx HID Mouse Example Application
    EF-GR5-00041-EN
    Rev.1.7
    2021-07-30
  • GR55xx HRS RSCS Relay Example Application
    EF-GR5-00037-EN
    Rev.1.9
    2021-07-30
  • GR55xx FreeRTOS Example Application
    EF-GR5-00036-EN
    Rev.1.8
    2021-07-30
  • GR55xx Bluetooth Low Energy Throughput Example Application
    EF-GR5-00035-EN
    Rev.1.9
    2021-07-30
  • GR55xx Sample Service Application and Customization
    EF-GR5-00042-EN
    Rev.1.8
    2021-07-30
  • GR551x Second Boot Example Application
    EF-GR5-00043-EN
    Rev.1.8
    2021-07-30
  • GR55xx AT Command Profile Example Application
    EF-GR5-00044-EN
    Rev1.1
    2021-07-30
  • GR551x Fast DFU Example Application
    EF-GR5-00032-EN
    Rev.1.6
    2021-07-30

Application Notes

Title
ID
Version
Date
Type
  • GR55xx DTM Test Application Note
    AP-GR5-00022-EN
    Rev.1.8
    2021-07-30
  • GR55xx Fault Trace Module Application Note
    AP-GR5-00023-EN
    Rev.1.8
    2021-07-30
  • GR551x DFU Application Note
    AP-GR5-00017-EN
    Rev.1.7
    2021-07-30
  • GR551x Sleep Mode and Power Consumption Measurement Application Note
    AP-GR5-00018-EN
    Rev.1.7
    2021-07-30
  • GR55xx Firmware Encryption Application Note
    AP-GR5-00021-EN
    Rev.1.8
    2021-07-30

Schematic/Layout Files

Title
ID
Version
Date
Type
  • GR5515-SK-BASIC-RevC
    SL-GR5-00001-EN
    Rev.1.5
    2021-05-16

Reference Files

Title
ID
Version
Date
Type
  • GR551x API Reference
    RM-GR5-00002-EN
    V1.6.10
    2021-07-30

Quick Start Guides

Title
ID
Version
Date
Type
  • GR551x Getting Started Guide
    QS-GR5-00002-EN
    Rev.1.7
    2021-07-30

SDK

Title
Description
  • The GR551x SDK includes multi-functional Bluetooth LE Stack API, easy-to-use system API, drivers, reference code and relevant documents.

General Tools

Title
Description
  • A Flash programming tool for GR551x SoC series, with function of firmware download, Flash read/write, and eFuse-related configurations, etc.

Development Tools

Title
Description
  • A universal Bluetooth LE tool APP which scans for Bluetooth LE devices, demonstrates Bluetooth LE standard profiles and is used for self-defined applications.

  • A serial ports debugging assistant on PC.

Debug Tools

Title
Description
  • GRSmart is the PC-based debugging tool that works with the GR551x Bluetooth LE Dongle.

Kit

Tool
Description
  • A development kit based on GR551x SoC which is designed for quick learning about GR551x development environment.

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