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參數(shù)資料
| 型號： | LM1253AN |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 畫面疊加 |
| 英文描述： | Monolithic Triple 180 MHz I2C CRT Pre-amp With Integrated Analog On Screen Display (OSD) Generator |
| 中文描述： | ON-SCREEN DISPLAY IC, PDIP28 |
| 封裝： | 0.600 INCH, PLASTIC, DIP-28 |
| 文件頁數(shù)： | 38/57頁 |
| 文件大?。?/td> | 1621K |
| 代理商： | LM1253AN |
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Display Page RAM
(Continued)
Notes:
In order to centralize the three characters above the five
characters on the row below, a ‘transparent’ blank char-
acter has been used as the first character on the row.
In order to create the transparent skipped lines between
the two character rows, a row of no characters has been
used, resulting in an RE, SL, RE, SL control code se-
quence.
In this example, the transparent character is defined by
the 2-color attribute table entryATT0. Bit 4 of Frame Con-
trol Register 1 must be set to indicate that the black color
is to be translated as transparent (see Control Register
Definitions section). Setting the transparent bit will make
any black in ATT0–ATT7 transparent.
The top row of characters are white on black; in this ex-
ample, these are defined by the 2-color attribute table en-
try ATT9.
The second row of characters are gray on black; in this
example, these are defined by the 2-color attribute table
entry ATT10.
The black background of the characters are not transpar-
ent because ATT9 and ATT10 are used.
The data shown in Table 11 is sent to the LM1253A in
four I
2
C transmissions.
DS101265-53
FIGURE 43. Example 3 OSD
L
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