Citizen Systems BD2-2220 - Manual (Page 117)

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fn=6、54： Function 6 Erasing All User NV Memory Area in a Lump
GS ( C pL pH m fn b [d1 d2 d3]
[Code] < 1D>H<28>H<43>H<pL><pH><m><fn><b>［d1 d2 d3］
[Range] (pL+pH×256)=6(pL=6、pH=0)
m=0
fn=6、54
b=0
d1=67(“C”)
d2=76(“L”)
d3=82(“R”)
[Outline] [The specification which is common to the model]
Erases all areas of user NV memory in a lump.