h8s-2649 Renesas Electronics Corporation., h8s-2649 Datasheet - Page 557

• Manufacturer Part Number: h8s-2649
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

3. Frame frequency selection
2. Software Settings
A. Duty selection
B. Segment driver 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 17.4.3, Operation in
Power-Down Modes.
A. A or B waveform selection
B. LCD drive power supply 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.
The segment drivers to be used can be selected with bits SGS3 to SGS0.
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.
Rev. 2.00 Dec. 05, 2005 Page 519 of 724
Section 17 LCD Controller/Driver
REJ09B0200-0200