Peripherals

• I/O
  • I/O Application Notes
    • 1. I/O Basic Functions Introduction
    • 2. I/O Application Notes
• ADC
  • ADC Application Notes
    • 1. Introduction to ADC Basic Functions
      • 1.1 ADC Function Overview
      • 1.2 Single-Ended Mode Measurement
      • 1.3 Differential Mode Measurement
      • 1.4 How to Select External Reference Voltage for Measurement
      • 1.5 How to Measure Chip Supply Voltage
      • 1.6 How to Measure Internal Chip Temperature
      • 1.7 How to Perform Multi-Channel Measurement
    • 2. Typical ADC Applications
      • 2.1 How to Evaluate Whether the Measurement Range Meets the Requirements
      • 2.2 How to Evaluate Whether the Resolution Meets the Requirements
      • 2.3 How to Improve Measurement Accuracy
      • 2.4 Calibration Method for Selecting Special External Reference Voltage
  • ADC Sampling Rate Test
    • 1. ADC Sampling Clock
    • 2. Testing Sampling Rate
      • 2.1 Required Settings
      • 2.2 Main Test Code
      • 2.3 Testing Results
• DMA
  • DMA
    • 1. Introduction to Basic Functions
    • 2. Application Notes
• I2C
  • I2C Application Notes
    • 1. Introduction to GR5xx I2C Basic Functions
    • 2. Typical I2C Applications
      • 2.1 How to Set Slave Address
      • 2.2 I2C Circuit Pull Up Resistor Configuration Considerations
      • 2.3 I2C Working Mode Recommendations
• I2S
• SPI and QSPI
  • Topic for SPI and QSPI
    • 01. SPI-QSPI Protocol Special Topic (1) - Introduction to Basic Protocol Features
      • 1. SPI Protocol
        • 1.1 Pin Signals
        • 1.2 Roles
        • 1.3 Clock Frequency
        • 1.4 Clock Modes
        • 1.5 Timing Phase
        • 1.6 SPI Protocol Derived Timing
      • QSPI Protocol
        • 2.1 Overview
        • 2.2 Pin Signals
        • 2.3 Timing Phase
        • 2.4 Instruction Addressing Mode
        • 2.5 QPI Modes
        • 2.6 SIOO Modes
        • 2.7 Efficiency Calculation
    • 02. SPI-QSPI Protocol Special Topic (2) - Fundamentals of Building GR55xx (Q)SPI High-Speed Transmission Interface
      • 1. Basic Application Background Supplement
        • 1.1 System Master and Slave
        • 1.2 Synchronous and Asynchronous Access
      • 2. Data Transmission Behavior
        • 2.1 Writing Data from CPU to Screen via QSPI
        • 2.2 Writing Data via DMA Directly to Screen through QSPI
        • 2.3 Reservoir Problem in Transmission (Producer & Consumer Problem)
    • 03. SPI-QSPI Protocol Special Topic (3) - GR552x Chip’s DMA and QSPI Module Features
      • 1. Typical DMA Features
        • 1.1 Typical DMA Applications
          • 1.1.1 DMA Base Data Transmission
          • 1.1.2 DMA Chain Data Transmission
          • 1.1.3 DMA Scatter Transmission
          • 1.1.4 DMA Gather Transmission
          • 1.1.5 DMA Scatter and Gather Transmission
        • 1.2 Features of DMA Transmission Channel
      • 2. Typical QSPI Features
        • 2.1 QSPI Working Modes
        • 2.2 QSPI Data Endian
          • 2.2.1 Data Endian in Write Operations
          • 2.2.2 Data Endian in Read Operations 2.2.2
          • 2.2.3 Read Rule for Static Data Endian in Memory Mapping Mode
          • 2.2.4 Read Rule for Dynamic Data Endian in Memory Mapped Mode 2.2.4
    • 04. SPI-QSPI Protocol Special Topic (4) - Color Formats and Common Exceptions
      • 1. Screen Color Format
        • 1.1 Common Color Code Formats
        • 1.2 Color Code Format Storage and Usage
      • 2. Analysis of Possible Causes of Out-of-Order Execution
        • 2.1 Inconsistent Read/Write Width of External Flash Leading to Reversal
        • 2.2 Abnormal Byte Order Configuration in Memory Mapped Read of External Flash
        • 2.3 Out-of-Order Due to Unaligned Address in DMA Access
      • 3. Common Display Issues
  • SPI Application Notes
    • 1. Introduction to Basic Functions
    • 2. Application Notes
  • QSPI Application Notes
    • 1. Basic Function Introduction
    • 2. Application Notes
    • 3. Typical Application Scenarios
      • 3.1 GR5526 supports the use of external flash as firmware cache for OTA upgrade.
• Timer
  • Application Note for Timer and Dual Timer
    • 1. Introduction to Timer and Dual Timer Basic Functions
    • 2. Application Notes for Timer and Dual Timer
  • APP RTC Application Note
    • 1. Introduction to RTC Basic Functions
    • 2. APP RTC Application Note for GR5xx
  • Typical WDT Applications
    • 1. Introduction to GR5xx WDT Basic Functions
    • 2. Typical GR5xx WDT Applications
  • GR5xx Timers
    • 1. Overview of GR5xx Timers
    • 2. Clock configuration of GR5xx slow clock timers
    • 3. RTOS tick implementation of each chip
• UART
  • UART Application Notes
    • 1. Introduction to UART Basic Functions
    • 2. UART Application Notes
• USB
  • USB Introduction
    • 1. Introduction to USB
    • 2. Typical USB Applications
• X-QSPI
  • X-QSPI Application Note
    • 1. Introduction to Basic Functions
    • 2. Application Notes
• GPU
  • GPU Application Notes
    • 1. Introduction to Basic Functions
      • 1.1 Main Features of GPU
      • 1.2 GPU Usage Key Points
        • 1.2.1 Frame Buffer
        • 1.2.2 Memory Allocation and Usage
        • 1.2.3 Reference Recommendations
    • 2. Application Notes
  • OSPI PSRAM Application Notes
    • 1. PSRAM Address Space Layout and Management
    • 2. Initialization and Usage of PSRAM
    • 3. PSRAM Working Mode
    • 4. PSRAM Sleep Strategy
      • 4.1 Hibernation Strategy in Bare Metal Environment
      • 4.2 Sleep Strategy in RTOS Environment
  • DC Application Note
    • 1. Introduction to Basic Functions
    • 2. Application Notes