unit pin symbol level mm gnd i mm vdd i mm v0 i mm rs h/l r/w h/l e h/l symbol min type max unit db0 h/l vdd v db1 h/l idd ma db2 h/l v led v db3 h/l i led ma db4 h/l topr i db5 h/l tsto i db6 h/l db7 h/l led- i symbol min type max unit led+ i v ih i 7 % % v v il i v v oh i 7 % % v v ol i v power supply for lcd h: data l: instruction code nominal dimensions pin connections function ? htt p ://www.ruitelcd.com e-mail:ruite168@21cn.com data bus line h: read l: write enable signal gnd(0v) supply voltage for logic(+5v) ? 4 ) & |