PXD20RM Datasheet, PDF (578/1628 Pages) Freescale Semiconductor, Inc – PXD20 Microcontroller

12.9.1.3 Other assumptions
The reset to the PDI clock is synchronized to the peripheral clock. Reset synchronization is done with
respect to the PDI clock internally.
The PDI clock should be available at least 10 clock after the last valid data. This corresponds to the delay
of the PDI block.
12.10 DCULite initialization
The following steps describe a typical approach to initializing the DCULite for use in an application.
1. After reset configure the DCULite peripheral to be active using the mode entry module and
configure the DCULite clock source in the MC_CGM. Configure the output ports in the SIUL as
required.
2. Configure the timing registers to match the TFT LCD panel in use (see Section 12.4.2, TFT LCD
panel configuration).
3. Set the background color as required.
4. Load the palette colors into the CLUT memory.
5. Configure the control descriptors for the layers and cursor that are to be used initially.
6. Enable the DCULite in the appropriate mode (DCU_MODE and RASTER_EN bit fields).
12.11 Glossary
Term
ARGB (also BGRA)
Component
CLUT
Direct color
Frame
Gamut
Indexed color
Palette
Panel
Pixel
Table 12-78. Glossary
Description
A data format where the pixel values are stored using four components: Alpha, Red,
Green and Blue. DCULite supports different variations of this format where different
numbers of bits can be used to represent each of the components
Part of a pixel that contains a single color (red, green or blue)
Color Look-up table. The table that contains the palette used by an indexed-color graphic
The full 24-bit value actually written to a pixel to create a color
The collection of all pixels on a panel
The set of colors that a panel can display. In most cases a panel cannot display the full
gamut of colors visible to the human eye.
An index into a table containing direct-colors. Usually smaller in size than the direct color;
the DCULite provides 1, 2, 4, and 8 bits per pixel options
The list of colors used by a graphic when an indexed colors format is used. The palette is
stored in a color look up table and can be from one color up to the maximum of the size
of the CLUT.
A TFT LCD containing an array of colored pixels.
The basic graphical element on a TFT LCD panel. Can display a range of colors
depending on the value of the red, green and blue values written to it. Normally arranged
in a rectangular array.
12-116
PXD20 Microcontroller Reference Manual, Rev. 1
Preliminary—Subject to Change Without Notice
Freescale Semiconductor