Hitachi H8S/2646 Hardware Manual page 674

Software Settings
• Duty selection
Any of four duty cycles—static, 1/2 duty, 1/3 duty, or 1/4 duty—can be selected with bits
DTS1 and DTS0.
• Segment selection
The segment drivers to be used can be selected with bits SGS3 to SGS0.
• Frame frequency selection
The frame frequency can be selected by setting bits CKS3 to CKS0. The frame frequency
should be selected in accordance with the LCD panel specification. For the clock selection
method in watch mode, subactive mode, and subsleep mode, see section 18.3.3, Operation in
Power-Down Modes.
• A or B waveform selection
Either the A or B waveform can be selected as the LCD waveform to be used by means of
LCDAB.
• LCD drive power supply selection
When an external power supply circuit is used, turn the LCD drive power supply off with the
PSW bit.
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