LM1276AAA National Semiconductor, LM1276AAA Datasheet - Page 46

• Manufacturer Part Number: LM1276AAA
• Description: 150 MHz I2C Compatible RGB Preamplifier with Internal 512 Character OSD ROM, 512 Character RAM and 4 DACs
• Manufacturer: National Semiconductor

www.national.com
C3B0
C1B0
Blue
Blue
Attribute Table and Enhanced Features
BUTTON BOX FORMATION
Please refer to the LM1247 datasheet for details.
Operation of the Shadow Feature
Please refer to the LM1247 datasheet for details.
X
X
Attribute Number, n
Bits 8–0
Bits 17–9
Bits 21–18
Bits 31–22
Bits 40–32
Bits 49–41
Bits 63–50
0000b
0001b
0010b
0100b
0101b
1000b
1001b
1010b
0011b
0110b
0111b
1011b
1100b
1101b
1110b
1111B
X
X
Color 3 - Green
Color 1 - Green
C3G[2:0]
C1G[2:0]
X
X
ATT4C5n (0x8505+n*4)
ATT4C3n (0x8503+n*4)
ATT4C1n (0x8501+n*4)
ATT4C7n (0x8507+n*4)
These nine bits determine color 0 which is displayed when the corresponding OSD pixel code is
00b.
These nine bits determine color 1 which is displayed when the corresponding OSD pixel code is
01b.
These are the enhanced feature (EF) bits, which determine which feature is applied to the
displayed character. The features and their corresponding codes are shown in Table 24.
Reserved and should be set to zero.
These nine bits determine color2, which is displayed when the corresponding OSD pixel code is
10b.
These nine bits determine color3, which is displayed when the corresponding OSD pixel code is
11b.
Reserved and should be set to zero.
X
X
TABLE 25. Attribute Tables and Corresponding Addresses
Two-Color Attribute Table Address
Reserved
X
X
Color 3 - Red
Color 1 - Red
C3R[2:0]
C1R[2:0]
X
X
0x844C–0x844F
0x845C–0x845F
0x846C–0x846F
0x847C–0x847F
0x8448–0x844B
0x8458–0x845B
0x8468–0x846B
0x8478–0x847B
0x8440–0x8443
0x8444–0x8447
0x8450–0x8453
0x8454–0x8457
0x8460–0x8463
0x8464–0x8467
0x8470–0x8473
0x8474–0x8477
Reserved
X
X
X
X
Color 2 - Blue
Color 0 - Blue
46
C2B[2:0]
C0B[2:0]
X
X
Operation of the Bordering Feature
Please refer to the LM1247 datasheet for details.
Constant Character Height Mechanism
Please refer to the LM1247 datasheet for details.
(Continued)
X
X
X
Color 2 - Green
Color 0 - Green
ATT4C6n (0x8506+n*4)
ATT4C4n (0x8504+n*4)
ATT4C2n (0x8502+n*4)
ATT4C0n (0x8500+n*4)
Four-Color Attribute Table Address
Enhanced Features
C2G[2:0]
C0G[2:0]
X
EFB[3:0]
0x8500–0x8507
0x8508–0x850F
0x8510–0x8517
0x8518–0x851F
0x8520–0x8527
0x8528–0x852F
0x8530–0x8537
0x8538–0x853F
0x8540–0x8547
0x8548–0x854F
0x8550–0x8557
0x8558–0x855F
0x8560–0x8567
0x8568–0x856F
0x8570–0x8577
0x8578–0x857F
X
X
Color 2 - Red
Color 0 - Red
C2R[2:0]
C0R[2:0]
Color 3 -
Color 1 -
C3B[2:1]
C1B[2:1]