I am making a counter box using 8051. I use LS7266R1 (IC chip with 2 quadrature encoders) as the counter and interface it with 8051. LS7266R1 document provides no wiring and no sample code for 8051. But I can find the sample wiring in the document of its one-axis version LS7166. I try to use "IO" mode method (another method is external address mode, but I suspect its wrong wiring on WR/RD pins) without any success. Does anyone know how to wire btw 8051 and LS7266R1, and the sample code? The help is greatly appreicated.