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參數資料
| 型號： | ADV7172 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | Digital PAL/NTSC Video Encoder with Six DACs 10 Bits, Color Control and Enhanced Power Management |
| 中文描述： | 數碼PAL / NTSC視頻編碼器與六DAC的10位，色彩控制和增強的電源管理 |
| 文件頁數： | 38/59頁 |
| 文件大小： | 455K |
| 代理商： | ADV7172 |
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ADV7172/ADV7173
–38–
REV. A
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 Bits (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 Bits (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 Bits (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.
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 ONLY
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
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 operation 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.
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相關代理商/技術參數 |
參數描述 |
|---|---|
| ADV7172KST | 制造商:AD 制造商全稱:Analog Devices 功能描述:Digital PAL/NTSC Video Encoder with Six DACs 10 Bits, Color Control and Enhanced Power Management |
| ADV7172KST-REEL | 制造商:Analog Devices 功能描述: |
| ADV7172KSTZ | 制造商:Analog Devices 功能描述: |
| ADV7172KSTZ-REEL | 功能描述:IC DAC VIDEO NTSC 6-CH 48-LQFP RoHS:是 類別:集成電路 (IC) >> 接口 - 編碼器，解碼器，轉換器 系列:- 產品變化通告:Development Systems Discontinuation 26/Apr/2011 標準包裝:1 系列:- 類型:編碼器 應用:DVB-S.2 系統 電壓 - 電源，模擬:- 電壓 - 電源，數字:- 安裝類型:- 封裝/外殼:模塊 供應商設備封裝:模塊 包裝:散裝 其它名稱:Q4645799 |
| ADV7173 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Digital PAL/NTSC Video Encoder with Six DACs 10 Bits, Color Control and Enhanced Power Management |
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