參數(shù)資料
型號(hào)： LM1253AAE/NA
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類： 畫面疊加
英文描述： ON-SCREEN DISPLAY IC, PDIP28
封裝： 0.600 INCH, PLASTIC, DIP-28
文件頁(yè)數(shù)： 36/61頁(yè)
文件大小： 1671K
代理商： LM1253AAE/NA
Control Register Definitions (Continued)
Vertical Blank Duration Control Register (I
2C address 8403h).
REGISTER NAME: VBLANKDUR
Bit 7
Bit 0
RSV
VB6
VB5
VB4
VB3
VB2
VB1
VB0
Bits 6–0: Vertical Blank Duration. These seven bits set the duration of the VBLANK signal in numbers of horizontal scan lines.
Bit 7:
RESERVED.
OSD Character Height Control Register (I
2C address 8404h).
REGISTER NAME: CHARHTCTRL
Bit 7
Bit 0
CH7
CH6
CH5
CH4
CH3
CH2
CH1
CH0
Bits 7–0: Character Height: this register sets the character height according to the constant character height mechanism
described in section Constant Character Height Mechanism. The value programmed in the register is equal to the
approximate number of OSD height compensated lines required on the screen divided by 4. The value is only
approximate, due to the approximation used in scaling the characters.
Example: If approximately 384 OSD lines are required on the screen (regardless of the number of image lines) then
the Character Height Control Register is programmed with the value of 81.
Button Box Highlight Color Register (EF1) (I
2C address 8405h–8406h).
REGISTER NAME: BBHLCTRLB1 (8406h) BBHLCTRLB0 (8405h)
Bit 15
Bit 8
Bit 7
Bit 0
RSV
R2
R1
R0
B2
B1
B0
G2
G1
G0
Bits 8–0:
Button Box highlight color. This register indicates the value of Enhanced Feature (button box highlight) register EF1.
Bits 15–9:
RESERVED.
Button Box Lowlight Color Register (EF2) (I
2C address 8407h–8408h).
REGISTER NAME: BBLLCTRLB1 (8408h) BBLLCTRLB0 (8407h)
Bit 15
Bit 8
Bit 7
Bit 0
RSV
R2
R1
R0
B2
B1
B0
G2
G1
G0
Bits 8–0:
Button Box lowlight color. This register indicates the value of Enhanced Feature (button box lowlight) register EF2.
Bits 15–9:
RESERVED.
Heavy Button Box Lowlight/Shadow/Shading Color Register (EF3) (I
2C address 8409h–840Ah).
REGISTER NAME: CHSDWCTRLB1 (840Ah) CHSDWCTRLB0 (8409h)
Bit 15
Bit 8
Bit 7
Bit 0
RSV
R2
R1
R0
B2
B1
B0
G2
G1
G0
Bits 8–0:
Heavy Button Box lowlight/shadow color. This register indicates the value of Enhanced Feature (heavy button box
lowlight or shadow/shading) register EF3.
Bits 15–9: RESERVED.
LM1253A
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