no useful at all. I tested with very low speed , can not write to next address.
admin 发表于 2022-6-26 07:56
As an User.... Maybe this IC is very sensitive is this version PLCC44. If you ask for slower speed why not trying to handle the 'need for speed'. I've 3 sockets, two ZIF
from different sources, and the one you have , but no IC to test.
I would test at least with all of them, but with only one option, i can remember add a decoupling
power capacitor, as i can't have the socket in a black pcb version, neither the speed down
option....just guessing, it works partially now. Please try it if you understand what i'm trying
to tell :-(
Hmm... Access may be too fast.
If you program it many times, it will gradually change to the correct value.
(ex: Write AA55, FFFF -> FEFF -> BEF7 -> AED7 -> AAD5 -> AA55)
I tested more and more , but it can not be sloved. programming logic is right. It seems that the age of the chip is too old to be written.
Found : after erasing,Disable erase before programming , then repeat programming more times. it can write into the first word, but cannot write the second word.
and M5M28F102 SOP40 is Normal. I can't find the the problem.
I looked it up.
All pins are connected(0Ω), and not shorted near pins.
Also, It successed program for HN27C1024(PLCC44) with this adapter.
This PLCC to DIP Adapter is works.
回复 2#admin
ttps://www.datasheets360.com/pdf/2009148678025692463
I'm checking the datasheet, this chip doesn't seem to suported boot lock feature.
The data read after erasing was the same as the data before erasing.
