AD study PCF8591\AD ................\ad.c ................\AD.hex ................\AD.lnp ................\ad.LST ................\AD.M51 ................\ad.OBJ ................\AD.Opt ................\AD.plg ................\AD.Uv2 ................\AD_Opt.Bak ................\AD_Uv2.Bak AD study PCF8591