參數(shù)資料
型號(hào)： ADV7152LS170
廠商： ANALOG DEVICES INC
元件分類： 顯示控制器
英文描述： CMOS 220 MHz True-Color Graphics Triple 10-Bit Video RAM-DAC
中文描述： PALETTE-DAC DSPL CTLR, PQFP100
封裝： PLASTIC, QFP-100
文件頁(yè)數(shù)： 13/32頁(yè)
文件大?。?/td> 454K
代理商： ADV7152LS170
ADV7152
–13–
REV. B
Pipeline Delay and On-Board Calibration
T he ADV7152 has a fixed number of pipeline delays (t
PD
), so
long as timings t
10
and
τ
-t
11
are met. However, if a fixed pipeline
delay is not a requirement, timings t
10
and
τ
-t
11
can be ignored,
a calibration cycle must be run and there is no restriction on
LOADIN to LOADOUT timing. If timings t
10
and
τ
-t
11
are not
met, the part will function correctly though with an increased
number of pipeline delays, t
PD
+ N CLOCK S (for 2:1 mode
N = 2, for 1:1 mode N = 0). T he ADV7152 has onboard cali-
bration circuitry which synchronizes pixel data and LOADIN
with the internal ADV7152 clocking signals. Calibration can be
performed in two ways: during the devices initialization se-
quence by toggling two bits of the Mode Register, MR10 fol-
lowed by MR15, or by writing a “1” to Bit CR10 of Command
Register 1 which executes a calibration on every Vertical Sync.
COLOR VIDE O MODE S
T he ADV7152 supports a number of color video modes all at
the maximum video rate. Command bits CR24–CR27 of Com-
mand Register 2 along with Bit MR11 of Mode Register 1 deter-
mine the color mode.
24-Bit “ Gamma” T rue Color
(CR25, CR26, CR27 = 1, 1, 1 and MR11 = 1)
T he part is set to 24-bit/30-bit T rue-Color operation. T he pixel
port accepts 24 bits of color data which is directly mapped to
the Look-Up T able RAM. T he Look-Up T able is configured as
a 256 location by 30 bits deep RAM (10 bits each for Red,
Green and Blue). T he output of the RAM drives the DACs with
30-bit data (10 bits each for Red, Green and Blue). T he RAM is
preloaded with a user determined, nonlinear function, such as a
gamma correction curve.
10
RED
256 x 10
GREEN
256 x 10
BLUE
256 x 10
10-BIT
GREEN DAC
10
10
8
24-BIT
PIXEL DATA
24-BIT TO 30-BIT
LOOK-UP-TABLE
30-BIT
COLOR DATA
ANALOG VIDEO
OUTPUTS
RED
OUT
GREEN
OUT
BLUE
OUT
10-BIT
BLUE DAC
10-BIT
RED DAC
8
8
Figure 17. 24-Bit to 30-Bit True-Color Configuration
T his mode allows for the display of full 24-bit, Gamma-
Corrected T rue-Color Images.
24-Bit “ Standard” T rue Color
(CR25, CR26, CR27 = 1, 1, 1 and MR11 = 0)
T his mode sets the part into direct 24-bit T rue-Color operation.
T he pixel port accepts 24 bits of color data which is directly
mapped to Look-Up T able RAM. T he Look-Up T able is con-
figured as a 256 location by 24 bits deep RAM (8 bits each for
Red, Green and Blue) and essentially acts as a bypass RAM.
T he output of the RAM drives the DACs with 24-bit data (8
bits each for Red, Green and Blue). T he RAM is preloaded with
a linear function.
T his mode allows for the display of full 24-bit T rue-Color
Images.
8
RED
256 x 8
GREEN
256 x 8
BLUE
256 x 8
8-BIT
GREEN DAC
8
8
8
24-BIT
PIXEL DATA
24-BIT TO 24-BIT
LOOK-UP-TABLE
24-BIT
COLOR DATA
ANALOG VIDEO
OUTPUTS
RED
OUT
GREEN
OUT
BLUE
OUT
8-BIT
BLUE DAC
8-BIT
RED DAC
8
8
Figure 18. 24-Bit to 24-Bit Direct True-Color Configuration
8-Bit “ Gamma” Pseudo Color
(CR25, CR26, CR27 = X , 0, 0 or X , 1, 0 or X , 0, 1 and
MR11 = 1)
T his mode sets the part into 8-bit Pseudo-Color operation. T he
pixel port accepts 8 bits of pixel data which indexes a 30-bit
word in the Look-Up T able RAM. T he Look-Up T able is con-
figured as a 256 location by 30 bits deep RAM (10 bits each for
Red, Green and Blue). T he output of the RAM drives the
DACs with 30-bit data (10 bits each for Red, Green and Blue).
10
RED
256 x 10
GREEN
256 x 10
BLUE
256 x 10
10-BIT
GREEN DAC
10
10
8
8-BIT
PIXEL DATA
8-BIT TO 30-BIT
LOOK-UP-TABLE
30-BIT
COLOR DATA
ANALOG VIDEO
OUTPUTS
RED
OUT
GREEN
OUT
BLUE
OUT
10-BIT
BLUE DAC
10-BIT
RED DAC
Figure 19. 8-Bit to 30-Bit Pseudo-Color Configuration
T his mode allows for the display of 256 simultaneous colors out
of a total palette of millions of addressable colors.
8-Bit “ Standard” Pseudo Color
(CR25, CR26, CR27 = X , 0, 0 or X , 1, 0 or X , 0, 1 and
MR11 = 0)
T his mode sets the part into 8-bit Pseudo-Color operation. T he
pixel port accepts 8 bits of pixel data which indexes a 24-bit
word in the Look-Up T able RAM. T he Look-Up T able is con-
figured as a 256 location by 24 bits deep RAM (10 bits each for
Red, Green and Blue). T he output of the RAM drives the
DACs with 24-bit data (8 bits each for Red, Green and Blue).
8
RED
256 x 8
GREEN
256 x 8
BLUE
256 x 8
8-BIT
GREEN DAC
8
8
8
8-BIT
PIXEL DATA
8-BIT TO 24-BIT
LOOK-UP-TABLE
24-BIT
COLOR DATA
ANALOG VIDEO
OUTPUTS
RED
OUT
GREEN
OUT
BLUE
OUT
8-BIT
BLUE DAC
8-BIT
RED DAC
Figure 20. 8-Bit to 24-Bit Pseudo-Color Configuration
相關(guān)PDF資料
PDF描述
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ADV7152LS220 制造商:Analog Devices 功能描述: 制造商:Analog Devices 功能描述:PALETTE-DAC DSPL CTLR, PQFP100
ADV7152LS85 制造商:AD 制造商全稱:Analog Devices 功能描述:CMOS 220 MHz True-Color Graphics Triple 10-Bit Video RAM-DAC
ADV7160 制造商:AD 制造商全稱:Analog Devices 功能描述:96-Bit, 220 MHz True-Color Video RAM-DAC
ADV7160KS140 制造商:Analog Devices 功能描述: 制造商:Rochester Electronics LLC 功能描述:220 MHZ VIDEO RAM DAC I.C. - Bulk
ADV7160KS170 制造商:Analog Devices 功能描述:DAC 3-CH Segment 10-bit 160-Pin MQFP 制造商:Rochester Electronics LLC 功能描述:220 MHZ VIDEO RAM DAC I.C. - Bulk
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