LM1253AN National Semiconductor, LM1253AN Datasheet - Page 38

• Manufacturer Part Number: LM1253AN
• Description: Monolithic Triple 180 MHz I2C CRT Pre-amp With Integrated Analog On Screen Display (OSD) Generator
• Manufacturer: National Semiconductor

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Display Page RAM
Notes:
• In order to centralize the three characters above the five
• In order to create the transparent skipped lines between
• In this example, the transparent character is defined by
• The top row of characters are white on black; in this ex-
• The second row of characters are gray on black; in this
• The black background of the characters are not transpar-
• The data shown in Table 11 is sent to the LM1253A in
characters on the row below, a ‘transparent’ blank char-
acter has been used as the first character on the row.
the two character rows, a row of no characters has been
used, resulting in an RE, SL, RE, SL control code se-
quence.
the 2-color attribute table entry ATT0. 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.
ample, these are defined by the 2-color attribute table en-
try ATT9.
example, these are defined by the 2-color attribute table
entry ATT10.
ent because ATT9 and ATT10 are used.
four I
2
C transmissions.
(Continued)
FIGURE 43. Example 3 OSD
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DS101265-53