Supplemented instruction for working with SFDP

bigbigmdm · Apr 22, 2024 · 32005b2 · 32005b2 · Fantu · Apr 23, 2024
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@@ -125,6 +125,14 @@ The progress bar shows the progress of the read, erase, and verify operations.
 
 If the SPI NOR FLASH chip is detected normally, but is not read (gives the message `Error reading sector 0`), then in the `Chip info` window you can change bits `BP4` and `BP3` to zero and press the `Write registers` button. Then repeat the chip reading operation.
 
+![SFDP](img/sfdp_unblock_en2.png)
+
+If the SPI NOR FLASH chip is read unreliably (with a different checksum each time) and `Status Register 2` is available in the chip, you can change bits `DRV0` and `DRV1` to zero and press the Write Registers button. This will increase the power of the output stage of the `DO` pin of the chip. Then repeat the chip read operation.
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+For `25xxx`, `95xxx` series chips that have only one status register, the `Chip info` form is as follows:
+
+![SFDP](img/sr0_en.png)
+
 ### File operations
 - The ![Save](img/save64.png) or `<Ctrl+S>` button is used to save the computer buffer to a file.