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参数资料
| 型号： | LM1253AAE/NA |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 画面叠加 |
| 英文描述： | ON-SCREEN DISPLAY IC, PDIP28 |
| 封装： | 0.600 INCH, PLASTIC, DIP-28 |
| 文件页数： | 41/61页 |
| 文件大小： | 1671K |
| 代理商： | LM1253AAE/NA |
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Control Register Definitions (Continued)
TABLE 12. PLL Setting (Register 843Eh)
Note: These settings are valid when R28 = 6.2k, C23 = 0.1 F,
C33 = 2.2 nF.
Frequency
Range
Value for Register 843Eh
30 kHz
1
01h
35 kHz
1
01h
40 kHz
2
02h
45 kHz
2
02h
50 kHz
2
02h
55 kHz
2
02h
60 kHz
2
02h
65 kHz
2
02h
70 kHz
3
03h
75 kHz
3
03h
80 kHz
3
03h
85 kHz
3
03h
90 kHz
3
03h
95 kHz
3
03h
100 kHz
3
03h
Software Reset and Test Control Register (I2C address 843Fh).
REGISTER NAME: SRTSTCTRL (843Fh)
Bit 7
Bit 0
RSV
AID
RSV
SRST
Bit 0:
Software Reset. Setting this bit causes a software reset. All registers (except this one) are loaded with their default
values. All operations currently in progress are aborted (except for I
2C transactions). This bit automatically clears itself
when the reset has been completed.
Bits 1–5: Reserved
Bit 6:
Auto Increment Disable. Setting this bit to one disables the automatic address increment feature of the I
2C register
access protocol.
Bit 7:
Reserved
ATTRIBUTE TABLE AND ENHANCED FEATURES
Each display character and SL in the Display Page RAM will have a 4-bit Attribute Table entry associated with it. The user should
note that two-color display characters and four-color display characters use two different Attribute Tables, effectively providing
16 attributes for two-color display characters and 16 attributes for four-color display characters.
For two-color characters the attribute contains the code for the 9-bit foreground color (Color 2), the code for the 9-bit background
color (Color 1), and the character’s enhanced features (Button Box, Blinking, Heavy Box, Shadowing, bordering, etc.).
For four-color characters the attribute contains the code for the 9-bit Color 1, the code for the 9-bit Color 2, the code for the 9-bit
Color 3, the code for the 9-bit Color 4 and the character’s enhanced features (Button Box, Blinking, Heavy Box, Shadowing,
bordering, etc.).
TWO-COLOR ATTRIBUTE FORMAT
REGISTER NAME: ATT2C3n (8443h +(n*4)), ATT2C2n (8442h +(n*4)),
where n = attribute code (See
Table 13)
Bit 31
Bit 24
Bit 23
Bit 16
RSV
EFB3
EFB2
EFB1
EFB0
C2B2
C2B1
REGISTER NAME: ATT2C1n (8441h +(n*4)), ATT2C0n (8440h +(n*4)),
where n = attribute code (See
Table 13)
Bit 15
Bit 8
Bit 7
Bit 0
C2B0
C2G2
C2G1
C2G0
C2R2
C2R1
C2R0
C1B2
C1B1
C1B0
C1G2
C1G1
C1G0
C1R2
C1R1
C1R0
Bits 8–0:
Color 1. These nine bits indicate the value of the color to be displayed as color 1. This is considered to be the
background color and is displayed when the corresponding pixel data bit is a zero.
Bits 17–9:
Color 2. These nine bits indicate the value of the color to be displayed as color 2. This is considered to be the
foreground color and is displayed when the corresponding pixel data bit is a one.
LM1253A
www.national.com
46
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相关代理商/技术参数 |
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| LM1253AN | 制造商:NSC 制造商全称:National Semiconductor 功能描述:Monolithic Triple 180 MHz I2C CRT Pre-amp With Integrated Analog On Screen Display (OSD) Generator |
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