Rob Guyatt

SH8 LVW problem

Discussion created by Rob Guyatt on Nov 24, 2008
Latest reply on Nov 26, 2008 by Rob Guyatt
I'd like some assistance with the LVD system in the 9S08SH8 please.
I can't reset the LVWF flag once set.
 
I'm using ICDHCS08 debugger. Stepping through shows that;

          lda     #%01011100     ; set LVWACK
          sta     $1809                ; SPMSC1

does not clear LVWF (when Vdd > Vlvw).
 
What is the correct procedure for clearing LVWF please?
 
Thanks
Rob


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