手上有一批CH554E，同一個編帶取下來的芯片，有幾顆焊到PCB上，是能通過USB正常燒錄程序的。大部分插到USB上都是不識別沒反應(yīng)的。我反復(fù)做過各種實(shí)驗(yàn)，確定是芯片問題。不能識別的PCB，換了正常的芯片后，就可以正常識別燒錄了，由此可以判斷出PCB、外圍電路是沒有問題的。嚴(yán)重懷疑有問題的芯片是內(nèi)部沒有bootloader。求指點(diǎn)，應(yīng)該怎樣才能燒錄bootloader?
您好，我們公司生產(chǎn)的芯片是一定會內(nèi)置BOOT程序的。您認(rèn)為沒有BOOT的主要依據(jù)是什么？或者購買信息是什么？詳細(xì)情況可以與技術(shù)溝通：025-52635387
純屬推測，要不我把芯片寄給你試試，如果是假貨，我去投訴賣家。如果是漏燒BOOTLOADER的，燒好寄回給我。這樣你們也可以了解一下，市場上是否有以假亂真的情況。我確認(rèn)芯片外圍電路沒有問題。芯片是真是假還是沒有BOOTLOADER就不得而知。
您好，建議您可以留個聯(lián)系電話或者聯(lián)系我司的客戶經(jīng)理025-52638388進(jìn)行配合處理，謝謝！
Well i must say we had the same problem with some chips from ali express, They could not start the bootloader. We have tried both bootpins as well as serial boot. Nothing worked.
Since i dont believe that the chips are without loader i guess somehow the bootloader got deactivated.
There is an option for that in config space.
This just happens with a few chips from ALi. Batches from LCSC were always fine. So we did not investigate further. I think this may happen more often now since LCSC has no stock.
