PXD20RM Datasheet, PDF (63/1628 Pages) Freescale Semiconductor, Inc – PXD20 Microcontroller

An optional Timing Controller (TCON) and RSDS interface is available to directly drive the row and
column drivers of a display panel.
Internal memory resource of the device allows to easily handle complex graphics contents (pictures, icons,
languages, fonts).
The DCU3 supports 4-plane blending and 16 graphics layers. Control Descriptors (CDs) associated with
each of the 16 layers enable effective merging of different resolutions into one plane to optimize use of
internal memory buffers. A layer may be constructed from graphic content of various resolutions including
indexed colors of 1, 2, 4 and 8 bpp, direct colors of 16, 24 and 32 bpp, and a YUV 4:2:2 color space. The
ability of the DCU3 to handle input data in resolutions as low as 1bpp, 2bpp and 4bpp enables a highly
efficient use of internal memory resources of the PXD20. A special tiled mode can be enabled on any of
the 16 layers to repeat a pattern optimizing graphic memory usage.
A hardware cursor can be managed independently of the layers at blending level increasing the efficient
use of the internal DCU3 resources.
To secure the content of all critical information to be displayed, a safety mode can be activated to check
the integrity of critical data along the whole system data path from the memory to the TFT pads.
The DCU3 features the following:
• Display color depth: up to 24 bpp
• Generation of all RGB and control signals for TFT
• Four-plane blending
• Maximum number of Input Layers: 16 (fixed priority)
• Dynamic Look-Up-Table (Color and Gamma Look-Up)
• blending range: up to 256 levels
• Transparency Mode
• Gamma Correction
• Tiled mode on all the layers
• Hardware Cursor
• Supports YCrCb 4:2:2 input data format
• RLE decode inline supporting direct read of RLE compressed images from system memory
• Critical display content integrity monitoring for Functional Safety support
• Internal Direct Memory Access (DMA) module to transfer data from internal and / or external
memory.
The DCU3 also features a Parallel Data Interface (PDI) to receive external digital video or graphic content
into the DCU3. The PDI input is directly injected into the DCU3 background plane FIFO. When the PDI
is activated, all the DCU3 synchronization is extracted from the external video stream to guarantee the
synchronization of the two video sources.
The PDI can be used to:
• Connect a video camera output directly to the PDI
• Connect a secondary display driver as slave with a minimum of extra cost
Freescale Semiconductor
PXD20 Microcontroller Reference Manual, Rev. 1
Preliminary—Subject to Change Without Notice
1-15