Features; Raster Engine Features Overview; Hardware Blinking - Cirrus Logic EP93 Series User Manual

Display Horizontal
Type Resolution
SXGA CRT 1280 x 1024
HDTV-2 LCD 1280 x 720
HDTV-2 CRT 1280 x 720
Since the frame buffer is stored in SDRAM memory, supporting displays with high frame rates
at high resolutions will not be practical and sometimes not possible without using displays
that have an integrated frame buffer.

7.2 Features

• Hardware pixel blinking
• Dual 256-color Look-up-tables (LUT)
• Grayscale/Color Generation for Monochrome/Passive Low Color Displays
• Flexible frame buffer architecture
• Supports video information in DIB (Device Independent Bitmap) format
• Hardware support for left and right panning of the displayed information
• Supports screen sizes up to 1280 x 1024 pixels, with a pixel depth of 4 bpp, 8 bpp, 16
bpp, 24 bpp packed, or 32 bpp (24 bpp unpacked)
Note: Using the Maximum Resolution causes system performance to slow.
• Pulse Width Modulated output that can be used to provide a DC voltage level for
brightness control
• Hardware cursor support with bottom and right edge clipping performed by hardware
• 24-bit color depth, but only 18 bits is bond-out

7.3 Raster Engine Features Overview

7.3.1 Hardware Blinking

The raster engine pipeline contains hardware pixel blinking logic. This circuitry will blink
pixels based on the Rate field in the
multiple or single bit planes may be used to specify blinking pixels by look up in the LUT. This
will allow the number of definable blinking pixels to range from all pixel combinations blinking
DS785UM1
Raster Engine With Analog/LCD Integrated Timing and Interface
Table 7-1. Raster Engine Video Mode Output Examples
Video Frame
Vertical Clock Buffer
x
Resolution Freq. Storage
(MHz) Format
8, 16, or
110
8, 16, or 24
50
8, 16, or 24
66
BlinkRate
Copyright 2007 Cirrus Logic
Pixels
Display
Per
Data
Shift
Format
Clock
Analog 1
24bpp
24-bit RGB 1
bpp
Analog 1
bpp
register. For 4 bpp and 8 bpp modes, either
EP93xx User's Guide
Pixel
Vertical
Shift
Frame
Clock Notes
Rate
Freq.
(Hz)
(MHz)
External
NA 70
DAC
50 50 24-bits
External
NA 60
DAC
7
7-3