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Bluetooth Low Energy is a wireless connection technology that works in short ranges and is low-cost and interoperable. It is widely used in various areas like mobile devices, IoT, healthcare and medical devices, smart home, and others. Bluetooth Low Energy operates on the 2.4 GHz ISM frequency band, with an application capacity as high as 1.4 Mbps and an application range as wide as 1,000 meters. It lowers the power consumption/energy to a large extent. Moreover, it is capable of providing power security protection to network/internet communications as it utilizes the complete AES-128 encryption technology.

Bluetooth 5.0

High speed
Adopts the encoding PHY that is at the speed of 2 Mbps, doubling the data capacity
Faster data transmission
Much lower power consumption
Long range
Adopts the encoding PHY that is at the speed of 125kbps, with a coverage range that is four times that of Bluetooth 4.2
TX and RX current consumptions remain unchanged
Lower power consumption brings more reliable network coverage
Large capacity
Number of data channels to transmit broadcasting data: 37
The broadcasting capability is eight times that of Bluetooth 4.2
The broadcasting expansion function allows components and devices to initiate and conduct connections at a long range

Bluetooth 5.1

Direction-Finding
Provides two methods of determining directions: AoA and AoD
Uses multiple transmission/reception antennas to realize a more precise positioning
Brings higher precision to RTLS and IPS
GATT Caching Enhancements
The GATT cache has a new function that allows saving historical records. Searches are no longer needed for re-connecting
Provides better connection performance while prolonging the battery life

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

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-GR5-00004-EN
    Rev.1.9
    2021-01-25
  • GR551x Datasheet Brief
    DS-GR5-00003-EN
    Rev.1.5
    2021-01-25

Design Files

Title
ID
Version
Date
Type
  • GR551x Hardware Design Guidelines
    DF-GR5-00003-EN
    Rev.1.8
    2021-01-25

User Guides

Title
ID
Version
Date
Type
  • GR551x Developer Guide
    UG-GR5-00020-EN
    Rev.2.0
    2021-01-25
  • GR5515 Starter Kit User Guide
    UG-GR5-00024-EN
    Rev.1.7
    2021-01-25
  • GR551x Bluetooth Low Energy Stack User Guide
    UG-GR5-00019-EN
    Rev.1.6
    2021-01-25
  • GR551x HAL and LL Drivers User Manual
    UG-GR5-00021-EN
    Rev.1.7
    2021-01-25
  • GR551x GCC User Manual
    UG-GR5-00023-EN
    Rev.1.7
    2021-01-25
  • GR551x Peripheral Examples Application Manual
    UG-GR5-00022-EN
    Rev.1.7
    2021-01-25
  • GR551x Bluetooth Low Energy Examples Application Manual
    UG-GR5-00027-EN
    Rev.1.6
    2021-01-25
  • GProgrammer User Manual
    UG-GGD-00004-EN
    Rev.2.0
    2021-01-25
  • GRSmart User Manual
    UG-GR5-00026-EN
    Rev.1.9
    2021-01-25

Example Files

Title
ID
Version
Date
Type
  • GR551x Power Consumption Profile Example Application
    EF-GR5-00027-EN
    Rev.1.9
    2021-01-25
  • GR551x Serial Port Profile Example Application
    EF-GR5-00028-EN
    Rev.1.7
    2021-01-25
  • GR551x AMS Profile Example Application
    EF-GR5-00021-EN
    Rev.1.6
    2021-01-25
  • GR551x ANCS Profile Example Application
    EF-GR5-00022-EN
    Rev.1.6
    2021-01-25
  • GR551x OTA Example Application
    EF-GR5-00026-EN
    Rev.1.8
    2021-01-25
  • GR551x HID Mouse Example Application
    EF-GR5-00029-EN
    Rev.1.6
    2021-01-25
  • GR551x HRS RSCS Relay Example Application
    EF-GR5-00025-EN
    Rev.1.8
    2021-01-25
  • GR551x FreeRTOS Example Application
    EF-GR5-00024-EN
    Rev.1.7
    2021-01-25
  • GR551x Bluetooth Low Energy Throughput Example Application
    EF-GR5-00023-EN
    Rev.1.8
    2021-01-25
  • GR551x Sample Service Application and Customization
    EF-GR5-00030-EN
    Rev.1.7
    2021-01-25
  • GR551x Fast DFU Example Application
    EF-GR5-00032-EN
    Rev.1.6
    2021-01-25
  • GR551x Second Boot Example Application
    EF-GR5-00031-EN
    Rev.1.7
    2021-01-25

Application Notes

Title
ID
Version
Date
Type
  • GR551x WeChat AirSync Application Note
    AP-GR5-00015-EN
    Rev.1.6
    2021-01-25
  • GR551x DTM Test Application Note
    AP-GR5-00016-EN
    Rev.1.7
    2021-01-25
  • GR551x Fault Trace Module Application Note
    AP-GR5-00014-EN
    Rev.1.7
    2021-01-25
  • GR551x DFU Application Note
    AP-GR5-00017-EN
    Rev.1.7
    2021-01-25
  • GR551x Sleep Mode and Power Consumption Measurement Application Note
    AP-GR5-00018-EN
    Rev.1.7
    2021-01-25
  • GR551x Firmware Encryption Application Note
    AP-GR5-00013-EN
    Rev.1.6
    2021-01-25

Schematic/Layout Files

Title
ID
Version
Date
Type
  • GR5515-SK-BASIC-RevC
    SL-GR5-00001-EN
    Rev.1.5
    2020-05-16

Reference Files

Title
ID
Version
Date
Type
  • GR551x API Reference
    RM-GR5-00001-EN
    Rev.1.6.06
    2021-01-25

Quick Start Guides

Title
ID
Version
Date
Type
  • GR551x Getting Started Guide
    QS-GR5-00001-EN
    Rev.1.6
    2021-01-25

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
  • GProgrammer is a generic Flash programming tool that applies to Goodix chip series. It supports the functions like firmware download, Flash read/write, and eFuse-related configurations.

Development Tools

Title
Description
  • A serial ports debugging assistant on PC.

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

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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