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參數(shù)資料
| 型號： | LM1236 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | 150 MHz I2C Compatible RGB Preamplifier with Internal 254 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254字符OSD光盤，512個字符RAM和4 DAC的內(nèi)置 |
| 文件頁數(shù)： | 39/43頁 |
| 文件大小： | 1898K |
| 代理商： | LM1236 |
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Pre-Amplifier Interface Registers
(Continued)
Software Reset and Test Control:
SRTSTCTRL (0x843F)
Res’d
X
Reserved
X
Reset
SRST
AID
X
X
X
X
Bit 0
When this bit is a 1, all registers except this one are loaded with their default values. All operations are aborted,
except data transfers in progress on the I
2
C compatible bus. This bit clears itself when the reset is complete.
Reserved and should be set to zero.
This bit disables the register Auto-Increment feature of the I
2
C compatible protocol. When set to a 1,
Auto-Increment is disabled and when a 0, AI is enabled.
Reserved and should be set to zero.
Bits 5–1
Bit 6
Bit 7
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 26
.
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 25
.
Reserved and should be set to zero.
Bits 17–9
Bits 21–18
Bits 31–22
TABLE 25. Enhanced Feature Descriptions
Bits 21–18
0000b
0001b
0010b
0011b
0100b
0101b
0110b
0111b
1000b
1001b
1010b
1011b
Feature Description
Normal Display
Blinking
Shadowing
Bordering
RESERVED
RESERVED
RESERVED
RESERVED
Raised Box
Blinking and Raised Box
Depressed Box
Blinking and Depressed Box
L
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|---|---|
| LM1236AAA/NA | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:150 MHz I2C Compatible RGB Preamplifier with Internal 254 Character OSD ROM, 512 Character RAM and 4 DACs |
| LM1237 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:150 MHz I2C Compatible RGB Preamplifier with Internal 254 Character OSD and 4 DACs |
| LM1237_04 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:150 MHz I2C Compatible RGB Preamplifier with Internal 254 Character OSD and 4 DACs |
| LM1237AAF/NA | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:150 MHz I2C Compatible RGB Preamplifier with Internal 254 Character OSD and 4 DACs |
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