F65510

Manufacturer Part NumberF65510
DescriptionControllers, Flat Panel VGA Controller
ManufacturerIntel Corporation
F65510 datasheet
 


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®
For example, text mode vertical compensation
consists of four priority order options:
n
Double Scanning+Line Insertion, Double
Scanning, Line Insertion
n
Double
Scanning+Line
Insertion, Double Scanning
n
Double
Scanning+Tall
Scanning, Tall Fonts
n
Double Scanning+Tall Fonts, Tall Fonts,
Double Scanning
Text and graphics modes offer two Line Replication
priority order options:
n
Double Scanning+ Line Replication, Double
Scanning, Line Replication
n
Double Scanning+ Line Replication, Line
Replication, Double Scanning
Horizontal
Compensation
techniques
Horizontal Compression, Horizontal Centering, and
Horizontal Doubling. Horizontal Compression will
compress 9-dot text to 8-dots such that 720-dot text
in Hercules modes will fit on a 640-dot panel.
SmartMap™
SmartMap™ is a proprietary feature that can be
invoked to intelligently map colors to gray levels in
text mode. SmartMap™ improves the legibility of
flat panel displays by solving a common problem.
Most application programs are optimized for color
CRT monitors using multiple colors. For example,
a word processor might use a blue background with
white characters for normal text, underlined text
could be displayed in green, italicized text in
yellow, and so on. This variety of colors, which is
quite distinct on a color CRT monitor, can be
illegible on a monochrome flat panel display if the
colors are mapped to adjacent grayscale values. In
the example, underlined and italicized text would be
illegible if yellow is mapped to grayscale 4, green
to grayscale 6 with the blue background mapped to
grayscale 5.
SmartMap™ compares and adjusts foreground and
background grayscale values to produce adequate
display contrast on flat panel displays.
minimum contrast value and the foreground /
background
grayscale
adjustment
programmed in the 65510's Extension Registers.
This feature can be disabled if desired.
Text Enhancement
Text Enhancement is another feature of the 65510
that improves image quality on flat panel displays.
Many applications, such as MS-DOS, use Dim
Revision 0.7
White for normal text characters, which results in
non-optimal contrast on flat panels. When turned
"on," the Text Enhancement feature displays Dim
White as Bright White, thereby optimizing the
contrast level on flat panels. This feature inverts
Insertion,
Line
the functionality of the Intensity Bit for White only.
Highlighted white, which is displayed as Bright
Fonts,
Double
White when Text Enhancement is "off," is shown as
Dim White with Text Enhancement "on," thus
maintaining a difference between normal and
highlighted text. Text Enhancement can be turned
"on" and "off" by changing a bit in one of the
Extension Registers.
Inverse Video
Inverse video can be enabled in text modes only
(normal video is displayed in graphics modes), in
graphics modes only (normal video is displayed in
include
text modes), or in both text and graphics modes.
PANEL POWER SEQUENCING
Flat panel displays are extremely sensitive to
conditions where full biasing voltage VEE is
applied to the liquid crystal material without
enabling the control and data signals to the panel.
This results in severe damage to the panel and may
disable the panel permanently. The 65510 provides
two pins called ENAVEE and ENAVDD to
regulate the LCD Bias Voltage (VEE) and the
driver electronics logic voltage (VDD), to provide
intelligent power sequencing to the panel.
timing diagram below illustrates the power
sequencing cycle.
The 65510 initiates a 'Panel Off' sequence if the
PWRDN/ input is asserted low and the chip is
programmed to enter 'panel off' mode (by setting
extension register XR52 bit-3=1).
initiates a 'panel on' sequence if PWRDN/ input is
high and the chip is programmed to 'panel on'
(XR52 bit-3=0). The delay time (T
adjusted via an extension register (XR5B).
ENAVDD
The
values
are
Flat Panel
Control &
Data Signals
ENAVEE
9
Introduction
The 65510
) may be
PO
Panel On
Panel Off
T
T
PO
PO
VALID
T
T
PO
PO
Panel Power Sequencing
Preliminary 65510
The