這個LCD模組是在北科大的今華電子買的，剛開始摸的時候真的是一頭霧水，後來才知道它是把一些針腳接到底下的板子上。
我實際有插的pin[VSS, VDD, RS, E, D4, D5, D6, D7]
針腳用途如下：
VSS : GND
VDD : 5V
VO: 0~5V 調文字顏色深淺度，我比較喜歡1.2V左右
RS: Register Select
若為1，把D0~D7放進資料暫存器
若為0，把D0~D7放進指令暫存器
RW: Read/Write mode
若為1，從LCD讀取資料
E: 若為0，寫入資料到LCD。(E: Enable)
1代表可寫入LCD
D0 (LSB)
D1~D6
D7 (MSB)
A 背光電源
K 背光接地
參考資料：葉難的Blog
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