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參數(shù)資料
| 型號： | ADV7152 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | CMOS 220 MHz True-Color Graphics Triple 10-Bit Video RAM-DAC(三通道,10位視頻RAM-D/A轉(zhuǎn)換器) |
| 中文描述： | 220兆赫的CMOS真彩色圖形三路10位顯存，數(shù)模轉(zhuǎn)換器（三通道，10位視頻RAM的的D / A轉(zhuǎn)換器） |
| 文件頁數(shù)： | 2/32頁 |
| 文件大小： | 322K |
| 代理商： | ADV7152 |
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ADV7152
–10–
REV. B
(Continued from page 1)
applications. The part is controlled and programmed through
the microprocessor (MPU) port. The part also contains a num-
ber of onboard test registers associated with self diagnostic test-
ing of the device.
The individual Red, Green and Blue pixel input ports allow
True-Color image rendition. True-Color image rendition, at
speeds of up to 220 MHz, is achieved through the use of the
onboard data multiplexer/serializer. The pixel input ports’ flex-
ibility allows for direct interface to most standard frame buffer
memory configurations.
The 30 bits of resolution associated with the color look-up table
and triple 10-bit DAC, realizes 24-bit True-Color resolution,
while also allowing for the onboard implementation of lineariza-
tion algorithms such as Gamma-Correction. This allows effec-
tive 30-bit True-Color operation.
The on-chip video clock controller circuit generates all the in-
ternal clocking and some additional external clocking signals.
An external ECL oscillator source with differential outputs is all
that is required to drive the CLOCK and
CLOCK inputs of the
ADV7152. The part can also be driven by an external clock
generator chip circuit, such as the AD730.
The ADV7152 is capable of generating RGB video output sig-
nals that are compatible with RS-343A and RS-170 video stan-
dards, without requiring external buffering.
Test diagnostic circuitry has been included to complement the
users’ system level debugging.
The ADV7152 is fabricated in a +5 V CMOS process. Its
monolithic CMOS construction ensures greater functionality
with low power dissipation.
The ADV7152 is packaged in a plastic 100-pin power quad flat-
pack (QFP). Superior thermal dissipation is achieved by inclu-
sion of a copper heatslug, within the standard package outline
to which the die is attached.
Pixel Port and Clock Control Circuit
The Pixel Port of the ADV7152 is directly interfaced to the
video/graphics pipeline of a computer graphics subsystem. It is
connected directly or through a gate array to the video RAM of
the systems Frame-Buffer (video memory). The pixel port on
the device consists of:
Color Data
RED, GREEN, BLUE
Pixel Controls
SYNC, BLANK
Palette Selects
PS0–PS1
The associated clocking signals for the pixel port include:
Clock Inputs
CLOCK,
LOADIN, SCKIN
Clock Outputs
LOADOUT, PRGCKOUT,
SCKOUT
These onboard clock control signals are included to simplify
interfacing between the part and the frame buffer. Only two
control input signals are necessary to get the part operational,
CLOCK and
CLOCK (ECL Levels). No additional signals or
external glue logic are required to get the Pixel Port & Clock
Control Circuit of the part operational.
Pixel Port (Color Data)
The ADV7152 has 48 color data inputs. The part has two (for
2:1 multiplexing) 24-bit wide direct color data inputs. These
are user programmed to support a number of color data for-
mats including 24-Bit True Color, 15-Bit True Color and
8-Bit Pseudo Color (see “Color Data Formats” section) in 2:1
and 1:1 multiplex modes.
A
B
MULTIPLEXER
24
RED
GREEN
BLUE
8
Figure 10. Multiplexed Color Inputs for the ADV7152
CIRCUIT DETAILS AND OPERATION
OVERVIEW
Digital video or pixel data is latched into the ADV7152 over the
device’s Pixel Port. This data acts as a pointer to the onboard
Color Palette RAM. The data at the RAM address pointed to is
latched into the digital-to-analog converters (DACs) and output
as an RGB analog video signal.
For the purposes of clarity of description, the ADV7152 is bro-
ken down into three separate functional blocks. These are:
1. Pixel port and clock control circuit
2. MPU port, registers and color palette
3. Digital-to-analog converters and video outputs
Table I shows the architectural and packaging differences be-
tween other devices in the ADV715x series of workstation parts.
(For more details consult the relevant data sheets.)
Table I. Architectural and Packaging Differences of the
ADV715x Series
Description
ADV7150*
ADV7152
ADV7151*
24-Bit “Gamma” True Color
24-Bit “Standard” True Color
8-Bit “Gamma” Pseudo Color
8-Bit “Standard” Pseudo Color
15-Bit True Color
220 MHz – True Color
220 MHz – Pseudo Color
Triple 10-Bit DACs
4:1 Multiplexing
2:1 Multiplexing
1:1 Multiplexing
160-Lead QFP
100-Lead QFP
*See ADV7151 and ADV7150 data sheets for more information on these parts.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| adv7152es | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Analog Devices 功能描述: |
| ADV7152KS110 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Video DAC with Color Palette (RAMDAC) |
| ADV7152KS135 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Video DAC with Color Palette (RAMDAC) |
| ADV7152KS170 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Video DAC with Color Palette (RAMDAC) |
| ADV7152KS85 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Video DAC with Color Palette (RAMDAC) |
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