QSPI Articles - Boardor

Advanced SPI Communication Techniques: From Four-Wire to Quad SPI, Daisy Chain Solutions to Double Your Project Speed!

2025-10-03 by boardor

1. Independent Chip Select (Standard Multi-Slave Mode) Solution Description: Each slave device is assigned an independent SS (chip select) line, and the master device activates the target slave by pulling down the corresponding SS line.Advantages: Each slave is independently controlled, and communication does not interfere with each other. Supports full-duplex high-speed transmission.Disadvantages: The number of … Read more

Comparison of SPI, DSPI, and QSPI Technologies

2025-09-20 by boardor

Click the aboveblue text to follow us In embedded systems, the Serial Peripheral Interface (SPI) and its extensions (such as DSPI and QSPI) are widely used for high-speed communication with external devices (such as sensors, memory, LCD controllers, etc.). The main differences are as follows: 1 SPI SPI (Serial Peripheral Interface) is a full-duplex synchronous … Read more

Q&A with Experts: Unable to Program QSPI Flash in Original Mode During JTAG Boot

2025-09-13 by boardor

Problem Description In the Zynq 1.0 version chip, I attempted to program (erase/write/read) the QSPI in the original mode, but the code hangs when booting in JTAG mode. Solution When the QSPI flash is in the original mode, MIO[5] is connected to the HOLD signal. To ensure that the HOLD signal is not held low … Read more

How to Change the Flashloader of JLink

2025-08-31 by boardor

How to Change the Flashloader of JLink Recently, many EVKs have been borrowed by clients, and today when I wanted to verify some code, I found that I only had the previous RT1050-EVKB. This board is factory defaulted to use HyperFlash, but it was previously reworked by a client to use QSPI Flash. I took … Read more

Using AHB to Write NOR Flash on i.MXRT

2025-07-08 by boardor

Hello everyone, I am Pi Zi Heng, a serious technical person. Today, I will introduce how to modify the FlexSPI driver on i.MXRT to write NOR Flash using AHB. Recently, I wrote an article titled “The Two Key Characteristics of Serial NAND Flash Preventing XiP under i.MXRT FlexSPI”, where I discussed the Page Read waiting … Read more

Implementing QuadSPI External Serial NOR Flash

2025-04-30 by boardor

Introduction The STM32 provides flexible and diverse access implementations for external memory. This article will introduce how to utilize QSPI (QuadSPI) to implement external serial NOR Flash memory. First, the functional characteristics of the QSPI interface will be introduced, followed by hardware design and software development. Based on STM32CubeM, a reference implementation for accessing the … Read more