參數(shù)資料
型號: LC7441N
元件分類: 畫面疊加
英文描述: PICTURE-IN-PICTURE IC, PDIP64
封裝: SDIP-64
文件頁數(shù): 10/20頁
文件大?。?/td> 410K
代理商: LC7441N
LC7441N, 7441NE
No.3941–18/20
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Pin control
The sub-screen position is determined by the SCK/FVP
and SD/FHP input levels as shown in the following
figure.(SCK/FVP, SD/FHP)
Serial control, single screen
The sub-screen position is variable when POSVAR is
HIGH, and fixed, when LOW. The fixed screen position
is determined by FVPR and FHPR at address 0 as shown
in the following figure.
Serial control, dual screen
The screen 1 position is fixed, and is determined by
FVPR and FHPR at address 1. The screen 2 position is
variable, and is determined by VP0 to VP5 and HP0 to
HP5.
Sub-screen Frame
The sub-screen, or screens, can have no frame, a white
frame or a colored frame. The D/A converter registers
YWK0 to YWK5, RWK0 to RWK5 and BWK0 to
BWK5 are used to set the frame color. The white frame
corresponds to YWK, RWK and BWK data values of
110000, 100000 and 100000, respectively.
Pin control
The frame, which is always white, is ON when the WK
input is HIGH, and OFF, when LOW.
Serial control, single screen
The frame is ON when the WK input is HIGH, and OFF,
whe LOW. The frame color is set using the frame-color
registers when WKVAR is HIGH, and white, when LOW.
When register FILD is HIGH, the field screen is dis-
played; when LOW, the frame screen is displayed.
Serial control, dual-screen
The screen 1 frame is ON when WK1 is HIGH, and OFF,
when LOW. The screen 2 frame is ON when WK2 is
HIGH, and OFF, when LOW.
The screen 1 frame color is set using the frame-color
registers when WKVAR1 is HIGH, and white, when
LOW. The screen 2 frame color is set using the frame-
color registers when WKVAR2 is HIGH, and white,
when LOW.
Wipe Function
The wipe function allows gradual display or erasure of
the sub-screen when in serial control, single-screen
mode. Wipe direction is set using the VWIPE and
HWIPE registers as shown in the following table. When
wiping is OFF, the sub-screen turns ON and OFF instan-
taneously, otherwise screen display and erasure occurs in
64 stages over approximately one second. Note that
screen erasure is in the reverse sequence to display.
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