LM1253A National Semiconductor, LM1253A Datasheet - Page 47

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

Control Register Definitions
Bits 21–18:
Bits 31–24:
FOUR-COLOR ATTRIBUTE FORMAT
REGISTER NAME: ATT4C7n (8507h +(n*4)), ATT4C6n (8506h +(n*4)),
Bit 63
REGISTER NAME: ATT4C5n (8505h +(n*4)), ATT4C4n (8504h +(n*4)),
Bit 47
REGISTER NAME: ATT4C3n (8503h +(n*4)), ATT4C2n (8502h +(n*4)),
Bit 31
REGISTER NAME: ATT4C1n (8501h +(n*4)), ATT4C0n (8500h +(n*4)),
Bit 15
Bits 8–0:
Bits 17–9:
Bits 21–18:
C4B0
C2B0
RSV
RSV
where n = attribute code (See Table 13 )
where n = attribute code (See Table 13 )
where n = attribute code (See Table 13 )
where n = attribute code (See Table 13 )
C4G2
C2G2
RSV
RSV
Enhanced Feature Bits. The enhanced features are determined as follows:
Reserved
Color 1. These nine bits indicate the value of the color to be displayed as Color 1. This is considered to be the back-
ground color and is displayed when the corresponding pixel data bit is 00b
Color 2. These nine bits indicate the value of the color to be displayed as Color 2. This is displayed when the cor-
responding pixel data bit is 01b
Enhanced Feature Bits. The enhanced features are determined as follows:
C4G1
C2G1
RSV
RSV
C4G0
C2G0
RSV
RSV
0000b
0001b
0010b
0011b
01XXb
1000b
1001b
1010b
1011b
1100b
1101b
1110b
1111b
0000b
0001b
001Xb
01XXb
1000b
1001b
Bits 21–28
Bits 21–18
C4R2
C2R2
RSV
RSV
C4R1
C2R1
RSV
RSV
Normal (no enhanced features enabled).
Blinking.
Shadowing.
Bordering.
RESERVED.
Raised Box.
Blinking and Raised Box.
Depressed Box.
Blinking and Depressed Box.
Heavy Raised Box.
Blinking and Heavy Raised Box.
Heavy Depressed Box.
Blinking and Heavy Depressed Box.
Normal (no enhanced features enabled).
Blinking.
RESERVED.
RESERVED.
Raised Box.
Blinking and Raised Box.
(Continued)
C4R0
C2R0
RSV
RSV
Bit 56
Bit 40
C3B2
Bit 24
C1B2
RSV
RSV
Bit 8
47
Description
Description
Bit 55
Bit 39
C3B1
Bit 23
Bit 7
C1B1
RSV
RSV
C3B0
C1B0
RSV
RSV
C3G2
C1G2
EFB3
RSV
C3G1
C1G1
EFB2
RSV
C3G0
C1G0
EFB1
RSV
C3R2
EFB0
C1R2
RSV
C4B2
C3R1
C2B2
C1R1
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C4B1
C3R0
C2B1
C1R0
Bit 48
Bit 32
Bit 16
Bit 0