參數(shù)資料
型號(hào)： LM1276AAA/NA
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類： 音頻／視頻放大
英文描述： 1 CHANNEL, VIDEO PREAMPLIFIER, PDIP28
封裝： PLASTIC, DIP-28
文件頁(yè)數(shù)： 39/50頁(yè)
文件大小： 6075K
代理商： LM1276AAA/NA
Bits 2–0
Reserved and should be set to zero.
Bit 3
When enabling this bit, the H Flyback input is internally received from the H Sync input.
Bits 7-4
Reserved and should be set to zero.
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 25.
ATT2C3n (0x8443+n*4)
ATT2C2n (0x8442+n*4)
Reserved
Enhanced Feature
Color 1 -
X
EFB[3:0]
C1B[2:1]
ATT2C1n (0x8441+n*4)
ATT2C0n (0x8440+n*4)
Blue
Color 1 - Green
Color 1 - Red
Color 0 - Blue
Color 0 - Green
Color 0 - Red
C2B0
C1G[2:0]
C1R[2:0]
C0B[2:0]
C0G[2:0]
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.
Bits 17–9
These nine bits determine the foreground color (color2), which is displayed when the corresponding OSD pixel is a 1.
Bits 21–18
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 24.
Bits 31–22
Reserved and should be set to zero.
TABLE 24. Enhanced Feature Descriptions
Bits 21–18
Feature Description
0000b
Normal Display
0001b
Blinking
0010b
Shadowing
0011b
Bordering
0100b
RESERVED
0101b
RESERVED
0110b
RESERVED
0111b
RESERVED
1000b
Raised Box
1001b
Blinking and Raised Box
1010b
Depressed Box
1011b
Blinking and Depressed Box
1100b
Heavy Raised Box
1101b
Blinking and Heavy Raised Box
1110b
Heavy Depressed Box
1111b
Blinking and Heavy Depressed Box
www.national.com
44
200969 Version 2 Revision 4
Print Date/Time: 2011/07/11 11:20:12
LM1276
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