W79E217A Datasheet, PDF (173/207 Pages) Winbond – 8-bit Microcontroller

Preliminary W79E217A Data Sheet
Figure 20-3: Common Signal Waveform
The segment signal corresponds to LCD display data memory. Each byte of data is read synchronized
with COM0, COM1, COM2 and COM3. If the contents of the each bit are 1, that bit is converted to the
select voltage. If the contents of the each bit are 0, that bit is converted to the deselect voltage. The
conversion results are output to segment pins. Refer to the figure below.
Figure 20-4: Segment signal waveforms
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Publication Release Date: December 14, 2007
Revision A3.0