LM1237 National Semiconductor Corporation, LM1237 Datasheet - Page 26

• Manufacturer Part Number: LM1237
• Description: 150 Mhz I2c Compatible Rgb Preamplifier With Internal 254 Character Osd And 4 Dacs
• Manufacturer: National Semiconductor Corporation

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Display Page RAM
EXAMPLE 2:
A 3x3 character matrix of characters on a black background is to be displayed on the screen, using 2-color character codes. 2
skipped lines are required below the first line of characters, 3 skipped lines are required below the second line of characters, and
4 skipped lines are required below the third line of characters. The first line of characters will use color attribute 0, the second line
will use color attribute 1, the third line will use color attribute 0 for the first character, color attribute 1 for the second character, and
color attribute 2 for the third character. This is shown in Figure 22.
• The colors of the characters and background can be stored in a single location in the 2-color attribute table, in location ATT0.
• The data shown in Table 10. Example 1 Data Transmission is sent to the LM1237 in one I
Data Sent
0xBA
0x0A
0x00
0x80
0x00
0x00
0x02
0x03
0x04
0x01
0x00
0x05
0x06
0x07
0x01
0x00
0x08
0x09
0x00
I
Chip address (See the Microcontroller Interface Section)
Address LSB
Address MSB
Use Attribute table 00 for the following characters
Skip 0 lines Command
Character “A”
Character “B”
Character “C”
Row-End (RE) Command
Skip 0 lines
Character “D”
Character “E”
Character “F”
Row-End (RE) Command
Skip 0 lines Command
Character “G”
Character “H”
Character “I”
Window-End (WE) Command
I
2
2
C start condition (See the Microcontroller Interface Section)
C stop condition (See the Microcontroller Interface Section)
(Continued)
TABLE 10. Example 1 Data Transmission
Description
26
2
C transmission.
RAM Address
800A
800B
800C
800D
800E
8000
8001
8002
8003
8004
8005
8006
8007
8008
8009