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參數資料
| 型號： | ADV473KP110 |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 顯示控制器 |
| 英文描述： | Circular Connector; No. of Contacts:55; Series:LJTP02R; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:17; Circular Contact Gender:Pin; Circular Shell Style:Box Mount Receptacle; Insert Arrangement:17-35 |
| 中文描述： | PALETTE-DAC DSPL CTLR, PQCC68 |
| 封裝： | PLASTIC, LCC-68 |
| 文件頁數： | 6/12頁 |
| 文件大?。?/td> | 200K |
| 代理商： | ADV473KP110 |
ADV473
–6–
REV. A
CIRCUIT DE SCRIPT ION
MPU Interface
T he ADV473 supports a standard MPU bus interface, allowing
the MPU direct access to the color palette RAM and overlay
color registers.
T hree address decode lines, RS0–RS2, specify whether the
MPU is accessing the address register, the color palette RAM,
the overlay registers, or read mask register. T hese controls also
determine whether this access is a read or write function. T able
I illustrates this decoding. T he 8-bit address register is used to
address the contents of the color palette RAM and overlay
registers.
T able I. Control Input T ruth T able
RS2
RS1
RS0
Addressed by MPU
0
0
0
0
1
1
1
1
0
1
0
1
0
1
0
1
0
1
1
0
0
1
1
0
Address Register (RAM Write Mode)
Address Register (RAM Read Mode)
Color Palette RAM
Pixel Read Mask Register
Address Register (Overlay Write Mode)
Address Register (Overlay Read Mode)
Overlay Registers
Command Register
Color Palette Writes
T he MPU writes to the address register (selecting RAM write
mode, RS2 = 0, RS1 = 0 and RS0 = 0) with the address of the
color palette RAM location to be modified. T he MPU performs
three successive write cycles (8 or 6 bits each of red, green, and
blue), using RS0–RS2 to select the color palette RAM (RS2 =
0, RS1 = 0, RS0 = 1). After the BLUE write cycle, the three
bytes of color information are concatenated into a 24-bit word
or an 18-bit word and written to the location specified by the
address register. T he address register then increments to the
next location which the MPU may modify by simply writing an-
other sequence of red, green, and blue data. A complete set of
colors can be loaded into the palette by initially writing the start
address and then performing a sequence of RED, GREEN and
BLUE writes. T he address automatically increments to the next
highest location after a BLUE write.
Color Palette Reads
T he MPU writes to the address register (selecting RAM read
mode, RS2 = 0, RS1 = 1 and RS0 = 1) with the address of the
color palette RAM location to be read back. T he contents of the
palette RAM are copied to the RED, GREEN and BLUE regis-
ters and the address register increments to point to the next pal-
ette RAM location. T he MPU then performs three successive
read cycles (8 or 6 bits each of red, green, and blue), using
RS0–RS2 to select the color palette RAM (RS2 = 0, RS1 = 0,
RS0 = 1). After the BLUE read cycle, the 24/18 bit contents of
the palette RAM at the location specified by the address register
is loaded into the RED, GREEN and BLUE registers. T he ad-
dress register then increments to the next location which the
MPU can read back by simply reading another sequence of red,
green, and blue data. A complete set of colors can be read back
from the palette by initially writing the start address and then
performing a sequence of RED, GREEN and BLUE reads. T he
address automatically increments to the next highest location
after a BLUE read.
T E RMINOLOGY
BLANK ING LE VE L
T he level separating the
SYNC
portion from the video portion
of the waveform. Usually referred to as the front porch or back
porch. At 0 IRE units, it is the level which will shut off the pic-
ture tube, resulting in the blackest possible picture.
COLOR VIDE O (RGB)
T his usually refers to the technique of combining the three pri-
mary colors of red, green and blue to produce color pictures
within the usual spectrum. In RGB monitors, three DACs are
required, one for each color.
COMPOSIT E
SYNC
SIGNAL (
SYNC
)
T he position of the composite video signal which synchronizes
the scanning process.
COMPOSIT E VIDE O SIGNAL
T he video signal with or without setup, plus the composite
SYNC
signal.
GRAY SCALE
T he discrete levels of video signal between reference black and
reference white levels. An 8-bit DAC contains 256 different lev-
els while a 6-bit DAC contains 64.
RAST E R SCAN
T he most basic method of sweeping a CRT one line at a time to
generate and to display images.
RE FE RE NCE BLACK LE VE L
T he maximum negative polarity amplitude of the video signal.
RE FE RE NCE WHIT E LE VE L
T he maximum positive polarity amplitude of the video signal.
SE T UP
T he difference between the reference black level and the blank-
ing level.
SYNC
LE VE L
T he peak level of the composite
SYNC
signal.
VIDE O SIGNAL
T hat portion of the composite video signal which varies in gray
scale levels between reference white and reference black. Also
referred to as the picture signal, this is the portion which may be
visually observed.
相關PDF資料 |
PDF描述 |
|---|---|
| ADV473KP135 | Circular Connector; No. of Contacts:55; Series:LJTP02R; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:17; Circular Contact Gender:Pin; Circular Shell Style:Box Mount Receptacle; Insert Arrangement:17-35 |
| ADV473KP66 | Circular Connector; No. of Contacts:55; Series:LJTP02R; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:17; Circular Contact Gender:Pin; Circular Shell Style:Box Mount Receptacle; Insert Arrangement:17-35 |
| ADV473KP80 | Circular Connector; No. of Contacts:55; Series:LJTP02R; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:17; Circular Contact Gender:Pin; Circular Shell Style:Box Mount Receptacle; Insert Arrangement:17-55 |
| ADV473 | CMOS 135 MHz True-Color Graphics Triple 8-Bit Video RAM-DAC(三通道,8位視頻RAM-DAC) |
| ADV476 | CMOS Monolithic Color Palette RAM-DAC(80MHz單片256×18彩色調色器RAM-D/A轉換器) |
相關代理商/技術參數 |
參數描述 |
|---|---|
| ADV473KP135 | 制造商:AD 制造商全稱:Analog Devices 功能描述:CMOS 135 MHz True-Color Graphics Triple 8-Bit Video RAM-DAC |
| ADV473KP35 | 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) |
| ADV473KP50 | 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) |
| ADV473KP66 | 制造商:Rochester Electronics LLC 功能描述:TRU COLOR VIDEO DAC IC - Bulk 制造商:Analog Devices 功能描述: |
| ADV473KP80 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
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