Goodix GR5526 User manual

GR5526 Starter Kit User Guide
Version: 1.0
Release Date: 2023-01-10
Shenzhen Goodix Technology Co., Ltd.

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Preface
Preface
Purpose
This document introduces the components and hardware features of GR5526 Starter Kit (GR5526 SK), as well as the
hardware layout & configuration and RF & current tests of the GR5526 Starter Kit Board (GR5526 SK Board), to help
you get started with the GR5526 SK Board quickly in developing Bluetooth Low Energy (Bluetooth LE) products and
applications with GR5526 System-on-Chips (SoCs).
Audience
This document is intended for:
• GR5526 user
• GR5526 developer
• GR5526 tester
• Technical writer
Release Notes
This document is the initial release of GR5526 Starter Kit User Guide, corresponding to GR5526 SoC series.
Revision History
Version Date Description
1.0 2023-01-10 Initial release
Copyright © 2023 Shenzhen Goodix Technology Co., Ltd. I

Contents
Contents
Preface.................................................................................................................................................................... I
1 Introduction........................................................................................................................................................ 1
1.1 Features............................................................................................................................................................... 1
2 Quick Start Guide................................................................................................................................................3
2.1 Preparation.......................................................................................................................................................... 3
2.2 Software Installation............................................................................................................................................3
2.3 Hardware Connection and Configuration............................................................................................................4
2.4 Example Running................................................................................................................................................. 6
2.5 Mobile Connection Test.......................................................................................................................................6
3 Hardware Layout and Configuration....................................................................................................................8
3.1 Block Diagram......................................................................................................................................................8
3.2 Hardware Layout................................................................................................................................................. 8
3.3 Interface MCU..................................................................................................................................................... 9
3.3.1 J-Link Port................................................................................................................................................... 9
3.3.2 CDC Virtual Serial Port................................................................................................................................9
3.3.3 Firmware Download Port..........................................................................................................................10
3.4 Power Supply.....................................................................................................................................................10
3.4.1 Power Supply Mode................................................................................................................................. 10
3.4.2 Charging Management Circuit.................................................................................................................. 11
3.4.3 Boost Circuit..............................................................................................................................................11
3.4.4 Battery Level Detection............................................................................................................................ 12
3.5 Buttons and LEDs.............................................................................................................................................. 12
3.6 On-board QSPI Flash/PSRAM............................................................................................................................ 13
3.7 Display & TP Interface.......................................................................................................................................14
3.8 Audio Module and On-board MIC.................................................................................................................... 16
3.9 AoA/AoD Multi-antenna Interfaces...................................................................................................................16
4 Performance Test.............................................................................................................................................. 18
4.1 RF Performance Test..........................................................................................................................................18
4.2 Current Consumption Test.................................................................................................................................20
5 SK Board Dimensions........................................................................................................................................ 22
6 FAQ................................................................................................................................................................... 23
6.1 Why Do I Fail to Connect to and Program GR5526 SK Board via J-Link?.......................................................... 23
7 Glossary............................................................................................................................................................ 24
Copyright © 2023 Shenzhen Goodix Technology Co., Ltd. II

Introduction
1 Introduction
The GR5526 Starter Kit (GR5526 SK) is a development platform based on GR5526 System-on-Chips (SoCs) (supporting
Bluetooth 5.3). It contains a GR5526 Starter Kit Board (GR5526 SK Board), design documents, and a user guide.
This helps users quickly develop product prototype and verify related functions/performance, shortening product
development and go-to-market periods.
The figure below shows the photo of a GR5526 SK Board:
Figure 1-1 GR5526 SK Board
Note:
By default, display application firmware has been programmed to a GR5526 SK Board. You can view demo graphics
by connecting a GR5526 SK Board to a display daughter board. You can also generate firmware by compiling other
application example projects provided in a GR5526 Software Development Kit (SDK) and then download the firmware
to a GR5526 SK Board for debugging/testing.
Before you get started, it is recommended to refer to the following documents.
Table 1-1 Reference documents
Name Description
GR5526 Developer Guide Introduces the software/hardware and quick start guide of GR5526 SoCs.
J-Link/J-Trace User Guide
Provides J-Link operational instructions. Available at https://www.segger.com/downloads/
jlink/UM08001_JLink.pdf.
GR5526-SK-BASIC-RevC Offers GR5526 SK Board schematic diagrams.
GProgrammer User Manual
Lists GProgrammer operational instructions including downloading firmware to and
encrypting firmware on GR5526 SoCs.
1.1 Features
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Introduction
• A single-mode Bluetooth Low Energy (Bluetooth LE) SoC that supports Bluetooth 5.3
• Multi-functional buttons and LEDs
• SEGGER J-Link OB that supports debugging
• UART-to-USB connector
• USB Type-C connector
• 1.39-inch circular color AMOLED touch display (454 x 454 dpi)
• On-board I2S Audio module
• Two on-board Pulse Density Modulation (PDM) digital microphones
• On-board QSPI Flash and PSRAM, with reserved interfaces for external Flash and PSRAM
• On-board AoA/AoD multi-antenna interface
• On-board adjustable boost circuit
• Battery level detection
• Reserved standard 2.54 mm jumper pin I/O interface
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Quick Start Guide
2 Quick Start Guide
This chapter introduces how to use the GR5526 SK by running a GR5526 application example on a GR5526 SK Board.
Note:
The GR5526 example projects are in SDK_Folder\projects. SDK_Folder is the root directory of GR5526 SDK.
2.1 Preparation
•Hardware preparation
Table 2-1 Hardware preparation
Name Description
Connection cable A USB Type-C cable to connect a GR5526 SK Board to a PC
Development board A GR5526 SK Board for running an application example
PC Where Keil runs; also serves as the power supply for the GR5526 SK Board
Mobile phone Where GRToolbox runs
•Software preparation
Table 2-2 Software preparation
Name Description
Operating system Windows 7 or later versions, or Ubuntu 16.04 LTS or later versions (both 32-bit and 64-bit are acceptable)
J-Link driver A J-Link driver. Available at https://www.segger.com/downloads/jlink/.
GR5526 SDK GR5526 SDK, containing rich example projects and driver files
Keil MDK5
An integrated development environment (IDE). MDK-ARM Version 5.20 or later is required. Available at
https://www.keil.com/download/product/.
GRToolbox
A Bluetooth LE debugging tool. Both GRToolbox (Android) and GRToolbox (iOS) are available.
• GRToolbox (Android): Available in SDK_Folder\tools\GRToolbox, or download from App store.
• GRToolbox (iOS): Available at the App Store.
2.2 Software Installation
Before hardware connection, the following software shall be installed.
• GR5526 SDK
GR5526 SDK provides rich application examples, including peripheral examples and Bluetooth LE examples.
GR5526 SDK is in ZIP file. Users can access the details after extracting the file.
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Quick Start Guide
• IDE
Install an IDE (Keil MDK5) on your PC for example project compilation to generate application firmware.
Download the installation file, and follow the steps of the installation wizard.
• GRToolbox
Download the installation file to the mobile phone, and follow the steps of the installation wizard. After
installation completes, tap on your phone to start GRToolbox.
• J-Link drivers
J-Link drivers should be installed on the PC to ensure J-Link functions properly in debugging. After installation
completes, users can view the SEGGER directory from the Start menu, as shown in Figure 2-1.
Figure 2-1 SEGGER directory
2.3 Hardware Connection and Configuration
To ensure proper function of the GR5526 SK Board, it is required to connect the board to a PC and set the power
supply mode.
GR5526 supports two connection/programming modes: J-Link and UART. You can select either one as needed.
•Connection via J-Link
USB Type-C cable
S11
S10
J5
PC
GR5526 SK Board
D1 S9
J65
Figure 2-2 Hardware connection (J-Link)
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Quick Start Guide
1. Connect the GR5526 SK Board to a PC.
Connect the GR5526 SK Board to a PC via the Type-C connector (J5) using a USB Type-C cable.
2. Set the power supply mode for the GR5526 SK Board.
Switch S11 (power selection switch) on the board to the right (VCC) to supply the board via USB connection.
Note:
The GR5526 SK Board also can be supplied by lithium battery. Switch S11 to the left (Li-BAT) to supply the board by
lithium battery.
3. Connect the on-board J-Link port.
Get the J-Link port (GPIO_0 and GPIO_1) of GR5526 SoC ready for programming and debugging via J-Link,
by connecting Pin1 to Pin3 and Pin2 to Pin4 of J65 on the GR5526 SK Board with jumpers.
4. Power the GR5526 SK Board on.
Switch S10 (power switch) on the board to the right (5V/VBAT) to turn on the board power supply; switch
S10 to the left (NC) to turn off the power supply.
5. Check the connection state (J-Link).
After the GR5526 SK Board is powered on, the LED D1 on the board starts flashing, indicating that the PC
begins to detect the J-Link port. After flashing for several times, D1 remains on, indicating that detection
succeeds.
When D1 remains on, open the File Explorer of the PC, and check whether J-Link is in the list of Device
Manager > Ports (COM & LPT). J-Link in the list indicates that the GR5526 SK Board has been connected to
the PC; otherwise, check whether the J-Link drivers are installed properly.
•Connection via UART
USB Type-C cable
S11
S10
PC
GR5526 SK Board
S9
J29
J65
Figure 2-3 Hardware connection (UART)
1. Connect the GR5526 SK Board to a PC.
Connect the GR5526 SK Board to a PC via the Type-C connector (J29) using a USB Type-C cable.
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Quick Start Guide
2. Set the power supply mode for the GR5526 SK Board.
Switch S11 (power selection switch) on the board to the right (VCC) to supply the board via USB connection.
3. Connect the on-board UART port.
Get the UART port (GPIO_0 and GPIO_1; same as the J-Link port) of GR5526 SoC ready for programming
and debugging via UART, by connecting Pin3 to Pin5 and Pin4 to Pin6 of J65 on the GR5526 SK Board with
jumpers.
4. Power the GR5526 SK Board on.
Switch S10 (power switch) on the board to the right (5V/VBAT) to turn on the board power supply; switch
S10 to the left (NC) to turn off the power supply.
5. Check the connection state (UART).
Start GProgrammer on the PC and select connection via UART for programming. You need to press
the RESET button (S9) to reset the GR5526 SK Board before establishing connection for programming.
Successful programming indicates the connection is established.
2.4 Example Running
Users shall take the following steps to run an application example after hardware connection and configuration
complete.
1. Navigate to the GR5526 example project directory: SDK_Folder\projects.
2. Open a GR5526 example project in Keil, for example, a heart rate application example (SDK_Folder\projec
ts\ble\ble_peripheral\ble_app_hrs).
3. Compile the example project and save the compilation result as an application firmware file (a BIN file or a HEX
file).
4. Download the application firmware file to the GR5526 SK Board.
5. Press S9 (RESET button) on the board to run the example project.
Note:
• By default, the example project directory contains firmware files. Users can directly download the firmware to
the board through GProgrammer.
• For more information about example project compilation and firmware download, refer to GR5526 Developer
Guide.
2.5 Mobile Connection Test
Users can also use GRToolbox to scan and connect the GR5526 SK Board for debugging/testing.
Copyright © 2023 Shenzhen Goodix Technology Co., Ltd. 6