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參數(shù)資料
| 型號(hào)： | ADV7173KSTZ-REEL |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 32/60頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC DAC VIDEO NTSC 6-CH 48LQFP |
| 標(biāo)準(zhǔn)包裝： | 2,000 |
| 類型： | 視頻編碼器 |
| 應(yīng)用： | 多媒體 |
| 電壓 - 電源，模擬： | 4.75 V ~ 5.25 V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 48-LQFP |
| 供應(yīng)商設(shè)備封裝： | 48-LQFP（7x7） |
| 包裝： | 帶卷 (TR) |
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REV. B
ADV7172/ADV7173
–38–
CGMS_WSS REGISTER 1 C/W1 (C/W17–C/W10)
(Address (SR4–SR0) = 1AH)
CGMS_WSS Register 1 is an 8-bit-wide register. Figure 61 shows
the operations under control of this register.
C/W1 BIT DESCRIPTION
CGMS/WSS Data (C/W15–C/W10)
These bit locations are shared by CGMS data and WSS data. In
NTSC mode these bits are CGMS data. In PAL mode these
bits are WSS data.
CGMS Data Only (C/W17–C/W16)
These bits are CGMS data bits only.
CGMS_WSS REGISTER 2 C/W1(C/W27–C/W20)
(Address (SR4-SR0) = 1BH)
CGMS_WSS Register 2 is an 8-bit-wide register. Figure 62
shows the operations under control of this register.
C/S BIT DESCRIPTION
CGMS/WSS Data (C/W27–C/W20)
These bit locations are shared by CGMS data and WSS data. In
NTSC mode these bits are CGMS data. In PAL mode these
bits are WSS data.
CONTRAST CONTROL REGISTER (CC07–CC00)
(Address (SR4–SR0) = 1DH)
The contrast control register is an 8-bit-wide register used to
scale the Y output levels. Figure 63 shows the operations under
control of this register.
CC0 BIT DESCRIPTION
Reserved (CC07–CC06)
A Logic “0” must be written to these bits.
Y Scalar Value (CC05–CC00)
These six bits represent the value required to scale the Y pixel
data from 0.75 to 1.25 of its initial level. The value of these six
bits is calculated using the following equation:
Contrast Control Register = (X –0.785)
× 128
where X = Scaling factor for Y
e.g., Scale Y by 0.9
Contrast Control Register = (0.9–0.75)
× 128 = 19.2 = 010011
(rounded to the nearest integer)
Actual scaling factor = 0.898.
C/W17
C/W16
C/W15
C/W14
C/W13
C/W12
C/W11
C/W10
C/W15–C/W10
CGMS/WSS DATA
C/W17–C/W16
CGMS DATA
Figure 61. CGMS_WSS Register 1
C/W27
C/W26
C/W25
C/W24
C/W23
C/W22
C/W21
C/W20
C/W27–C/W20
CGMS/WSS DATA
Figure 62. CGMS_WSS Register 2
CC07
CC06
CC05
CC04
CC03
CC02
CC01
CC00
CC05–CC00
Y SCALAR VALUE
CC07–CC06
ZERO SHOULD
BE WRITTEN
TO THESE BITS
Figure 63. Contrast Control Register
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| ADV7174 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Chip Scale PAL/NTSC Video Encoder with Advanced Power Management |
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