LM1253A National Semiconductor, LM1253A Datasheet - Page 36

• Manufacturer Part Number: LM1253A
• Description: Monolithic Triple 180 MHz I2C CRT Pre-amp With Integrated Analog On Screen Display (OSD) Generator
• Manufacturer: National Semiconductor

www.national.com
Display Page RAM
Notes:
Command
• Every row must begin with an attribute and a SL value.
• If an I
• Every row except the last row of a Display Window must
(hex)
Sent
Display Page RAM memory location 8000h will always be
associated with the SL of row 0 of Display Window #1.
middle of a row) the first byte sent in the next I
mission is the attribute.
end with an RE character. The character immediately af-
ter an RE character is always the SL value for the next
row.
BA
BA
00
80
00
02
02
03
04
01
05
80
2
C transmission finishes without an RE (in the
I
Chip address (See the Micro-Controller Interface Section)
Address LSB
Address MSB
Use Attribute table 00 for the following characters
Skip 2 lines
Character “A”
Character “B”
Character “C”
Row end
I
I
Chip address (See the Micro-Controller Interface Section)
Address LSB
Address MSB
2
2
2
C start condition (See the Micro-Controller Interface Section)
C stop condition (See the Micro-Controller Interface Section)
C start condition (See the Micro-Controller Interface Section)
(Continued)
TABLE 10. Example 2 I
FIGURE 42. Example 2 OSD
2
C trans-
Description
36
2
C Transmissions
• The last row in a Display Window must be a WE charac-
• The data shown in Table 10 is sent to the LM1253A in five
ter. The WE character must NOT be preceded by an RE
character.
I
2
C transmissions.
DS101265-52
RAM Address of
the Character
or Command
8000
8001
8002
8003
8004