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ADV473 Datasheet(PDF) 1 Page - Analog Devices

Part No. ADV473
Description  CMOS 135 MHz True-Color Graphics Triple 8-Bit Video RAM-DAC
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

ADV473 Datasheet(HTML) 1 Page - Analog Devices

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REV. A
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
a
CMOS 135 MHz True-Color Graphics
Triple 8-Bit Video RAM-DAC
ADV473
MODES
24-Bit True Color
8-Bit Pseudo Color
15-Bit True Color
8-Bit True Color
SPEED GRADES
135 MHz, 110 MHz
80 MHz, 66 MHz
GENERAL DESCRIPTION
The ADV473 is a complete analog output, Video RAM-DAC
on a single CMOS monolithic chip. The part is specifically
designed for true-color computer graphics systems.
The ADV473 integrates a number of graphic functions onto one
device allowing 24-bit direct true-color operation at the maxi-
mum screen update rate of 135 MHz. It can also be used in
other modes, including 15-bit true color and 8-bit pseudo or in-
dexed color. The ADV473 is fully PS/2 and VGA register level
compatible. It is also capable of implementing IBM’s XGA
standard.
(Continued on page 4)
FEATURES
ADV478/ADV471 (ADV®) Register Level Compatible
IBM PS/2,* VGA*/XGA* Compatible
135 MHz Pipelined Operation
Triple 8-Bit D/A Converters
Triple 256
8 (256
24) Color Palette RAM
Three 15
8 Overlay Registers
On-Board Voltage Reference
RS-343A/RS-170 Compatible Analog Outputs
TTL Compatible Digital Inputs and Outputs
Sync on All Three Channels
Programmable Pedestal (0 or 7.5 IRE)
Standard MPU l/O Interface
+5 V CMOS Monolithic Construction
68-Pin PLCC Package
APPLICATIONS
High Resolution Color Graphics
True-Color Visualization
CAE/CAD/CAM
Image Processing
Desktop Publishing
FUNCTIONAL BLOCK DIAGRAM
SWITCHING
MATRIX &
PIXEL
MASK
D
A
C
P
O
R
T
P
I
X
E
L
P
O
R
T
MODE CONTROL
REGISTERS
PIXEL MASK
REGISTERS
RED
REG
GREEN
REG
BLUE
REG
ADDRESS
REG
D0–D7
V
REFIN
SYNC
BLANK
RED
GREEN
BLUE
8
COLOR
PALETTE/
OVERLAY
PALETTE
SWITCHER
CLOCK
ADV473
RS0 RS1
RS2
RD
WR
S0
S1
OL0
OL3
R0
R7
G0
G7
B0
B7
V
REFOUT
OPA
IOR
IOB
CR0
CR1
CR2
CR3
MPU PORT
MPU & PIXEL
PORT
CONTROL LOGIC
OVERLAYS
4
IOG
8
8
8
VOLTAGE
REFERENCE
GENERATOR
VOLTAGE
REFERENCE
CONTROL
CIRCUIT
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
PALETTE
COLOR
RED
256 x 8
RAM
GREEN
256 x 8
RAM
BLUE
256 x 8
RAM
OVERLAY PALETTE
15 x 8 RAM
15 x 8 RAM
15 x 8 RAM
8
8
8
GREEN
DAC
BLUE
DAC
RED
DAC
ADV is a registered trademark of Analog Devices Inc.
*Personal System/2 and VGA are trademarks of International Business Machines Corp.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
Fax: 617/326-8703


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