![]() ![]() So maybe we have to set multiple pins into multiple states for it to work. No obvious BOOT pin as one would expect with a device thats not meant to be tampered with.īut maybe pulling some pin high or low during reset will get me somewhere. Having found slides from a TI presentation revealing the connection between the BQ8030 and bq20z90 I opened up the datasheet for the latter (since theres no public datasheet for the former). So I moved on to poking at other things but eventually came back for a second look and thats when I realized: Command scan starting at 0x70 before sending command.īrick wall meet impatience I couldnt really get any further with just that information so I started looking at the hardware instead. Not really expecting much I tried a word write of 0x0214 to command 0x71 aand. ![]() The procedure for accessing the Boot ROM on those chips is documented in datasheets and application notes.).Įspecially this screenshot of the software that comes with it. Theoretically you could turn it into a bq20z90 by downloading the firmware from one and uploading that. ![]()
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December 2022
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