Dears:
From datasheet the pin of MR is pulled up to VDD, however, the actual value we tested is about 1.2V.
VDD is about 3.1V, and the MR is not pulled up by other resister.
The schematic is follows:
Btw, when we test the value of MR, R255, R536 and R253 all do not been welded.
Pls. give some advice about the issue.
Thanks a lot!
Best regards
Luck Wu