1 foot: for to power VSS.
2 feet: VDD take 5 V is power.
3 feet: VL for LCD contrast the adjustment, and then when the power is the weakest contrast,
grounded contrast the highest, and the contrast
Through high can produce the "ghost", when used, can pass a 10 K adjust
potentiometer contrast.
4 feet: RS for registers choice, high electric usually choose data registers, low electric usually
choose instruction register.
5 feet: R/W signal lines for reading and writing, high electric usually are read operation, low
electricity at ordinary times for write operation. When the RS and the R/W common
For low electricity can be written instructions at ordinary times, or displays address, when RS for
low level R/W high power for at ordinary times can read busy signal, and when
RS for high level R/W for low electricity data can be written at ordinary times.
6 feet: E end to make can end, when E is driven by high level jump into low electricity at
ordinary times, LCD module executive order.
7 to 14 feet: D0 ~ D7 for eight two-way data cables.
15 feet: back light positive.
16 feet: back light negative.
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