【Official description】Instructions on USB and serial port downloads for CH554 series microcontrollers

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【Official description】Instructions on USB and serial port downloads for CH554 series microcontrollers [Copy link]

1. The CH554 series supports USB and serial port download programs. 2. When using USB download, you must pull UD+ high before powering on to enter the bootloader. After entering the bootloader, you can use USB to download or serial port to download. 2. When using the serial port to download, you do not have to pull UD+ high before powering on (to achieve keyless download): first prepare the ISP software, and you can also achieve serial port download by directly powering on the serial port connection. 3. If you encounter the problem that the USB can download, but the serial port cannot download. Please do the following: Select "Bootloader V2.30 or earlier version" in the "Function" of the ISP software . (Because the ISP software has been updated to the latest version recently, the previously issued chips must select this "Bootloader V2.30 or earlier version" when downloading with the serial port. The chips that are released later do not need to select the new bootloader.) If you have any questions, please post them in time, and we will answer them as soon as we see them. @ddllxxrr @swustlx86 @yang_alex @jinglixixi @I love downloading@ketose @zhang7309 @Veiko @ljj3166 @北@mars4zhu @mig29ee @emu8086 @lehuijie @bioger @沁hengUSB MCU

zhang7309

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sammy902583

Hello, when I am burning the code, the error message shown in the picture will appear. This error only occurs on some PCs. I wonder if it has something to do with Win7/Win10? Although there is an error, the program can still run normally. In addition, the download tool cannot use the hex file generated by SDCC. It needs to be converted into a bin file before downloading.

SuiBianLiuLiu

The hex of SDCC should be caused by the tool parsing not being supported. It is recommended to use keil 51 for compilation. The error status of the first offset error is whether it is an error reported during downloading or during verification. If it is during verification, it means that the verification file and the chip file do not match.

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kirk

Hello, I am using CH552T. I use a USB cable to connect to the microcontroller, D+ to P3.6, D- to P3.7. After opening WCHISPTool, the chip cannot be recognized. How should this be solved?