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參數(shù)資料
| 型號： | LM1246NA |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | 150 MHz I2C Compatible RGB Preamplifier with Internal 512 Character OSD ROM, 512 Character RAM and 4 DACs |
| 中文描述： | 150 MHz的I2C兼容的RGB前置放大器512個字符OSD光盤，512個字符RAM和4 DAC的內(nèi)置 |
| 文件頁數(shù)： | 44/51頁 |
| 文件大?。?/td> | 2794K |
| 代理商： | LM1246NA |
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Pre-Amplifier Interface Registers
(Continued)
Bits 7–0
This is an 8-bit wide register that records the measured value of the vertical flyback or sync in
terms of horizontal line periods during video detect. Once measurement is completed and the auto
size enable bit has cleared itself back to 0, the measured data is ready to be read by the
microcontroller. Reading this register before that may give erroneous results. This register resets to
default values, ready to record new measured values when the auto size enable bit is set again.
Vertical Back Porch Duration:
V_BP1 (0x858A)
V_BP0 (0x8589)
Reserved
X
Vertical Back Porch Duration
VBP[10:0]
X
X
X
X
Bits 10–0
This is an 11-bit wide register that records the lowest measured value of the vertical back porch in
terms of horizontal line periods during video detect. When no video is detected, the sum of this
register and the vertical flyback or sync should be within 1 line of the total number of lines per
field. Once measurement is completed and the auto size enable bit has cleared itself back to 0, the
measured data is ready to be read by the microcontroller. Reading this register before that may
give erroneous results. This register resets to default values, ready to record new measured values
when the auto size enable bit is set again.
Attribute Table and Enhanced Features
Each display character and SL in the Display Page RAM will have a 4–bit Attribute Table entry associated with it. The user should
note that two-color display characters and four-color display characters use two different Attribute Tables, effectively providing 16
attributes for two-color display characters and 16 attributes for four-color display characters.
For two-color characters, the attribute contains the code for the 9-bit foreground color (Color 1), the code for the 9-bit background
color (Color 0), and the character’s enhanced features (Button Box, Blinking, Heavy Box, Shadowing, Bordering, etc.).
For four-color characters, the attribute contains the code for the 9-bit Color 0, the code for the 9-bit Color 1, the code for the 9-bit
Color 2, the code for the 9-bit Color 3, and the character’s enhanced features (Button Box, Blinking, Heavy Box, Shadowing,
Bordering, etc.).
TWO COLOR ATTRIBUTE FORMAT
The address range for an attribute number, 0
≤
n
≤
15, is provided in
Table 31. Attribute Tables and Corresponding
Addresses
.
ATT2C3n (0x8443+n*4)
ATT2C2n (0x8442+n*4)
Enhanced Feature
EFB[3:0]
Reserved
X
Color 1 -
C1B[2:1]
X
X
X
X
X
X
X
X
X
ATT2C1n (0x8441+n*4)
Color 1 - Green
C1G[2:0]
ATT2C0n (0x8440+n*4)
Color 0 - Green
C0G[2:0]
Blue
C2B0
Color 1 - Red
C1R[2:0]
Color 0 - Blue
C0B[2:0]
Color 0 - Red
C0R[2:0]
Bits 8–0
These nine bits determine the background color (color1), which is displayed when the
corresponding OSD pixel is a 0.
These nine bits determine the foreground color (color2), which is displayed when the
corresponding OSD pixel is a 1.
These are the enhanced feature (EF) bits, which determine which feature is applied to the
displayed character. The features and their corresponding codes are shown in
Table 30. Enhanced
Feature Descriptions
.
Reserved and should be set to zero.
Bits 17–9
Bits 21–18
Bits 31–22
TABLE 30. Enhanced Feature Descriptions
Bits 21–18
0000b
0001b
0010b
0011b
Feature Description
Normal Display
Blinking
Shadowing
Bordering
L
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相關代理商/技術參數(shù) |
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| LM1247 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:150 MHz I2C Compatible RGB Preamplifier with Internal 512 Character OSD ROM, 512 Character RAM and 4 DACs |
| LM1247AAG/NA | 功能描述:IC PREAMP CMOS 150MHZ 24DIP RoHS:否 類別:集成電路 (IC) >> 線性 - 視頻處理 系列:- 產(chǎn)品變化通告:Product Discontinuation 07/Mar/2011 標準包裝:3,000 系列:OMNITUNE™ 類型:調(diào)諧器 應用:移動電話，手機，視頻顯示器 安裝類型:表面貼裝 封裝/外殼:65-WFBGA 供應商設備封裝:PG-WFSGA-65 包裝:帶卷 (TR) 其它名稱:SP000365064 |
| LM1247DMC/NA | 制造商:Texas Instruments 功能描述: |
| LM124A | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Low Power Quad Operational Amplifiers |
| LM124AD | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:LOW POWER QUAD OPERATIONAL AMPLIFIERS |
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