h8s-2646 Renesas Electronics Corporation., h8s-2646 Datasheet - Page 682

• Manufacturer Part Number: h8s-2646
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

Section 18 LCD Controller/Driver
Software Settings
• Duty selection
• Segment selection
• Frame frequency selection
• A or B waveform selection
• LCD drive power supply selection
Rev. 5.00 Sep 22, 2005 page 656 of 1136
REJ09B0257-0500
Any of four duty cycles—static, 1/2 duty, 1/3 duty, or 1/4 duty—can be selected with bits
DTS1 and DTS0.
The segment drivers to be used can be selected with bits SGS3 to SGS0.
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.
Either the A or B waveform can be selected as the LCD waveform to be used by means of
LCDAB.
When an external power supply circuit is used, turn the LCD drive power supply off with the
PSW bit.