PXD20RM Datasheet, PDF (411/1628 Pages) Freescale Semiconductor, Inc – PXD20 Microcontroller

11.4.1 Graphic sources
As the DCU3 is a master on the crossbar switch, it can access directly any memory or device connected to
the crossbar switch as a slave. This includes all on-chip flash, all on-chip RAM, and any slave capable of
providing high enough data rates, such as, for example an expanded bus interface or a QuadSPI module.
Therefore, any compatible graphic stored anywhere on-chip or in an accessible interface can be displayed
on the connected TFT LCD panel with no further intervention from the CPU, except to program the DCU3
to fetch and place it. The DCU3 also includes a dedicated memory to store the graphic for its cursor layer.
11.4.2 TFT LCD panel configuration
The nature and timing of the signals required by TFT LCD panels vary greatly between manufacturers.
Therefore, the DCU3 allows highly flexible and detailed configuration of these signals. Refer to the TCON
module chapter for additional options when configuring timing signal outputs for panels without an
embedded timing controller.
Timing diagrams for TFT LCD panels are typically divided into a horizontal timing chart and a vertical
timing chart. See Figure 11-63 for details.
Freescale Semiconductor
PXD20 Microcontroller Reference Manual, Rev. 1
Preliminary—Subject to Change Without Notice
11-77