SH7760 Datasheet, PDF (1124/1345 Pages) Renesas Technology Corp – SuperHTM RISC engine

(TFT module)
State
Control Pin
Power Supply for
Logic
VCPWC
Operating State
(Transitional State)
Stopped State
Supply
Supply
Supply
Display Data,
Timing Signal
LCD_CL2, LCD_CL1,
LCD_FLM,
LCD_M_DISP,
LCD_DATA
Supply
Supply
Power Supply for
High-Voltage Systems
VEPWC
Supply
The table above 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.
Warning regarding display-off mode (LCDC stopped):
When LCD module power-supply control-sequence processing is in use by the LCDC and the
supply of power is cut off while the LCDC is in its display-on mode, the LCDC may not function
properly. In the worst case, the connected LCD module may be damaged.
30.4.7 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 conducting hardware rotation, the following five changes must be made from the settings
for no hardware rotation. (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).
Rev. 1.0, 02/03, page 1074 of 1294