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| timschu | Posted: 24 Jul 2022, 10:07 AM |
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 Member Posts: 2 Joined: 23-July 22 |
FYI. You can read/erase/write the JDY-31 BK3231S flash with a CH341A programmer.  Last edit by timschu at 24 Jul 2022, 10:07 AM ------------- |
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| timschu | Posted: 24 Jul 2022, 05:07 PM |
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Member Posts: 2 Joined: 23-July 22 |
BK3231 erase chip W 31 02 A5 W 31 03 C3 W 25 wait 100 ms W 31 02 00 W 31 03 00 erase sector W 31 02 A5 W 31 03 C3 W 24 aa aa wait 50 ms W 31 02 00 W 31 03 00 read 4 bytes W 22 aa aa R dd dd dd dd program 4 bytes W 31 02 A5 W 31 03 C3 W 21 aa aa dd dd dd dd W 31 02 00 W 31 03 00 "aa aa" is address / 4, high byte first "dd dd dd dd" is 4 bytes of data 1 sector is 0x1000 bytes, sector containing specified address will be erased JDY-30 BK3231 firmware is read-protected, returns FF FF FF FF ... :( MSB of programmed bytes 0, 4, 8, 12, 16, 20, 24, ... flip ~50% of the time, not sure why. Maybe BK3231 is not 100% compatible with my CH341A programmer. ------------- |
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