ST7920 - Topwaydisplay.com
ST7920 - Topwaydisplay.com
ST7920 - Topwaydisplay.com
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<strong>ST7920</strong><br />
LCD 驅 動 訊 號 說 明 (1/33 duty , 1/5 bias )<br />
當 振 盪 頻 率 為 540KHZ 時 1 clock cycle time = 1.85us<br />
1 frame = 1.85us x 300 x 33 = 18315us=18.3ms<br />
300 clocks<br />
1 2 3 4 33 1 2 3 4 33 1 2 3 4 33<br />
COM1<br />
V0<br />
V1<br />
V2<br />
V3<br />
V4<br />
VSS<br />
COM2<br />
V0<br />
V1<br />
V2<br />
V3<br />
V4<br />
VSS<br />
COM33<br />
V0<br />
V1<br />
V2<br />
V3<br />
V4<br />
VSS<br />
SEGx<br />
off<br />
V0<br />
V1<br />
V2<br />
V3<br />
V4<br />
VSS<br />
SEGx<br />
on<br />
V0<br />
V1<br />
V2<br />
V3<br />
V4<br />
VSS<br />
1 frame<br />
C3.0 31/47 2002/10/11
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