You may be unable to perform ISP writing in this circuit.
It is necessary to carry out pulldown of the R/W pin of G-LCD by about 100Kohm.
Reference circuit diagram.
http://pub.idisk-just.com/fview/6bku9rm6mDiXCtJ00psUq6qedPJwEUsyfzQV9M6vXjXKII7qFZ4qaovOoLY5-1ll__CgeEk5IVK4Hxu31s4jrf9qHKkDb3Ru.pdf
O-Family
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