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参数资料
| 型号： | LC74798 |
| 元件分类： | 画面叠加 |
| 英文描述： | ON-SCREEN DISPLAY IC, PDIP30 |
| 封装： | 0.400 INCH, SDIP-30 |
| 文件页数： | 13/32页 |
| 文件大小： | 322K |
| 代理商： | LC74798 |
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No. 5833-20/32
LC74798, 74798M
COMMAND12 (Display control setup command)
First byte
DA
Register
Contents
Notes
0 to 7
State
Function
7—
1
6—
1
5—
1
4—
1
3—
0
2—
1
1—
0
0—
1
Command 7 identification code.
Display control setup.
Extended command 5 identification code
Second byte
Note: All registers are set to 0 when the LC74798/M is reset by the RST pin.
DA
Register
Contents
Notes
0 to 7
State
Function
7—
0Second byte identification bit
6VINNP
0
Negative CSYNC input polarity
1Positive CSYNC input polarity
5VIN2
0Normal input
1
CSYNC input to the SEPIN pin
4
SEL22
0
1
3HLFTON
0
1
2
SEL2
0
1
SEL1
0
Vertical synchronization signal input (external synchronization)
1
Frame signal input
0
CTL3
0Internal V separation used
1Internal V separation not used (external V separation)
CSYNC input polarity selection
SEPIN pin input switching
SYNCJDG pin (pin 8) output switching.
The halftone output line specification depends on
background color specification (the logical or of the
3-line specification)
SYNCDET2: Used for character display
LOCK2: Used for character display
SEPIN (pin 27) input switching.
Only valid when CTL3 is high.
V separation switching
SEL22
SEL2
HLFTOM
Output
00
0
SYNCJDG
00
1
Halftone
010
O/E
011
LOCK
10
0
SYNDET2
10
1
SENDET
11
0LOCK2
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