SPRUIE9D May 2017 – May 2024 DRA74P , DRA75P , DRA76P , DRA77P
The Display Subsystem (DSS) provides the logic to display a video frame from the system memory frame buffer on a liquid-crystal display (LCD) panel or TV set.
The display subsystem can display different pictures simultaneously by using three LCD outputs (LCD1, LCD2, and LCD3), in addition to a TV output.
All three LCD outputs are available on three parallel interfaces (DPI1, DPI2, and DPI3), providing support for MIPI DPI 2.0, or BT-656 or BT-1120.
The TV output is available on one of the following interfaces
The modules integrated in the display subsystem are:
The necessary video phase-locked loops (PLLs) with their corresponding control modules, and the physical layer (PHY) for HDMI are outside the display subsystem. The video PLLs allow independant display outputs at different frequencies. The supported PLLs and PHY are:
To ensure efficient bandwidth, the display subsystem integrates a connection between the device L3_MAIN interconnect and the DISPC to exchange data with synchronous dynamic random access memory (SDRAM) using the DISPC DMA engine. The same connection is also used for configuration.
Figure 13-1 is a high-level diagram of the display subsystem.