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參數(shù)資料
型號(hào): LC7442
元件分類(lèi): 畫(huà)面疊加
英文描述: PICTURE-IN-PICTURE IC, PDIP64
封裝: SDIP-64
文件頁(yè)數(shù): 16/23頁(yè)
文件大小: 317K
代理商: LC7442
P. 3
Block Diagram
1
A/D converter
2
Loop filter
3
Loop filter
4
Micro-
processor
5
Input data
timing control
6
A/D control
7
Sub-screen PLL
8
Field
determination
9
Main screen PLL
10
Serial data
controller
11
Vertical filter
(calculation and line memory)
12
Write address
13
Read address
14
Output buffer
15
Control register
16
Write data
control
17
Selector
18
Memory control
19
Read data
control
20,21,22
D/A converter
23
Output control
24
Dual port
DRAM:
256 kbytes
or 1 Mbyte
P. 4
Component-Type PIP System Structural Diagram
1
A/D clamp
2
Reset
3
Main vertical synchronization
4
Main horizontal synchronization
5
Sub-screen vertical synchronization
6
Sub-screen horizontal synchronization
7
Micro-
processor
8
Dual port RAM
9
Main/sub switching (blanking)
10
Frame
P. 7
Function Descriptions
(1) Main screen
(2) Or:
P. 8
Frame control
(6) 1
Sub-screen
(7) 1
There are 4 wipe types.
2
An operating time of about 1.0 seconds.
3
V wipe
4
H wipe
5
VH wipe
6
D wipe
7
Off
LC7442
No. 4412-23/12
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