Dell Latitude 5440 IDB40 LA-M401P reading the Bios-WSON8 UC2

[Thoa]

Hello Community...

I am totaly disappointed, cause i bought a used Dell Latitude 5440 with a cracked display. I ve spend another 50 Euros for the new screen and it does his job very well. Then I reallized that a Bios-Passwort is set. First I bought the CH341A black edition with the clamp and was confidence, that it will do its job, realizing that this does not work. So I decided to buy a pogo-pin-tool to read the UC2 first of all (nothing tried on UC6 Yet). The outcome was very random when reading the WSON 8x6, so I decided to buy the XGecu T48, but it is the same. No reliable data. So my question: Is it possible, that the pogo-pin-tool does not work cause the contact-area is too small?

I hope that I can send a dump of my Bios in near future... Sincerly... Thoa

[mon2]

Personally would consider to invest into a WSON to PDIP adapter board. Is it 8x6 or is 5x6? Believe that Aliexpress will have these. If shopping, there is one or 2 boards you should invest into for the very odd flash packages used on macbooks. Will share the details later and their links. Worthwhile. Then you should be more stable to R/W/E with your growing list of programming tools.

[Thoa]

Personally would consider to invest into a WSON to PDIP adapter board. Is it 8x6 or is 5x6? Believe that Aliexpress will have these. If shopping, there is one or 2 boards you should invest into for the very odd flash packages used on macbooks. Will share the details later and their links. Worthwhile. Then you should be more stable to R/W/E with your growing list of programming tools.

Thx mon2 for your quick answer. But I wanted to avoid get this chip out of his circuit-board, so i would had to buy an hot air-solder-station, too. And I am scared to damage the board.
The XM25RH256C on the Latitude 5520 works very fine. I can read, write and erase the chip as i like even with my CH341A. But dont know, whats wrong with the 5520. I wrote my Problem in the "5520 BIOS Requests only"

The BIOS on the 5440 is on 2 Chips as far as I know.... WSON 8x6 and a little brother right next to him. I leave the little one... First i need to have access to the WSON 8x6.

[mon2]

Found the schematics and see the UC2 bios. With good contacts, you should be able to R/W/E this device. I would definitely make sure that you can dump the ID registers with reliability and then perform a few full dumps before erasing what you have today inside of this device. To me, the device does not look to be anything special.

Have your configured the flash device parameters to be in QSPI mode or is it standard SPI mode? The pinout implies that the device is operating in QSPI mode = 4 lines of data are shifted upon each clock cycle.

[Thoa]

Found the schematics and see the UC2 bios. With good contacts, you should be able to R/W/E this device. I would definitely make sure that you can dump the ID registers with reliability and then perform a few full dumps before erasing what you have today inside of this device. To me, the device does not look to be anything special.

Have your configured the flash device parameters to be in QSPI mode or is it standard SPI mode? The pinout implies that the device is operating in QSPI mode = 4 lines of data are shifted upon each clock cycle.

OK. That could be the reason, why it does not work. I used Xgpro, AsProgrammer and NeoProgrammer so far, but i cannot find any option for QSPI. In none of those 3 Programs.