HD6417727BP160CV Datasheet, PDF (865/1098 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH™ RISC engine Family/ SH7700 Series

Section 25 LCD Controller
The above table shows the states of the power supply, display data, and timing signals for the
typical LCD module in its active and stopped states. Some of the supply voltages described may
not be necessary, because some modules internally generate the power supply required for high-
voltage systems from the logic-level power-supply voltage.
Notes on display-off mode (LCDC stopped):
If LCD-module power-supply control-sequence processing is in use by the LCDC or the supply of
power is cut off while the LCDC is in its display-on mode, normal operation is not guaranteed. In
the worst case, the connected LCD module may be damaged.
25.3.7 Operation for Hardware Rotation
Operation in hardware-rotation mode is described below. Hardware-rotation mode can be thought
of as using a landscape-format LCD panel instead of a portrait-format LCD panel by placing the
landscape-format LCD panel as if it were a portrait-format panel. Whether the panel is intended
for use in landscape or portrait format is thus no problem. The panel must, however, be within 320
pixels wide.
When making settings for hardware rotation, the following five differences from the setting for no
hardware rotation must be noted. (The following example is for a display at 8 bpp. At 16 bpp, the
amount of memory per dot will be doubled. The image size and register values used for rotation
will thus be different.)
1. The image data must be prepared for display in the rotated panel. (If 240 × 320 pixels will be
required after rotation, 240 × 320 pixel image data must be prepared.)
2. The register settings for the address of the image data must be changed (LDSARU and
LDLAOR).
3. LDLAOR should be power of 2 (when the horizontal width after rotation is 240 pixels,
LDLAOR should be set to 256).
4. Graphics software should be set up for the number 3 setting.
5. LDSARU should be changed to represent the address of the data for the lower-left pixel of the
image rather than of the data for the upper-left pixel of the image.
Rev.6.00 Mar. 27, 2009 Page 807 of 1036
REJ09B0254-0600