參數(shù)資料
型號(hào): LC74789JM
元件分類: 畫面疊加
英文描述: ON-SCREEN DISPLAY IC, PDSO24
封裝: 0.300 INCH, PLASTIC, MFP-24
文件頁(yè)數(shù): 7/23頁(yè)
文件大?。?/td> 209K
代理商: LC74789JM
DA
Register
Contents
Notes
0 to 7
State
Function
7
1
6
1
Command 6 identification code.
5
1
Sets up synchronizing signal control.
4
0
3
SEL0
0
1
2
MOD0
0
1
DISLIN
0
12 lines
Switches the number of lines displayed.
1
10 lines
0
MUT
0
Normal output
CVOUT switching
1
CVIN is cut and CVOUT is held at the pedestal level.
SEL0
MOD
SEPOUT output
0
Sync separator signal
0
1
Low-level output
1
0
High-level output
1
ST pulse signal
No. 5732-15/23
LC74789, 74789M, 74789JM
COMMAND6 (Synchronizing signal detection setup command)
First byte
Switches the SEPOUT (pin 19) output.
Second byte
DA
Register
Contents
Notes
0 to 7
State
Function
7
0
Second byte identification bit
6
RN2
0
1
5
RN1
0
1
4
RN0
0
1
3
SN3
0
1
2
SN2
0
1
SN1
0
1
0
SN0
0
1
Note: All registers are set to 0 when the LC74789/M/JM is reset by the RST pin.
External synchronizing signal detection control
Signal absent
→ signal present transition detection
Sets the sampling period in which SYNC can be
detected continuously in the horizontal synchronizing
signal period (1H).
External synchronizing signal detection control
Signal present
→ signal absent transition detection
Sets the sampling period in which SYNC cannot be
detected continuously in the horizontal synchronizing
signal period (1H).
RN2
RN1
RN0
Number of times HSYNC detected
0
0 times
0
1
4 times
0
1
0
8 times
1
0
16 times
SN3
SN2
SN1
SN0
Number of times HSYNC detected
0
Not detected
0
1
32 times
0
1
0
64 times
0
1
0
128 times
1
0
256 times
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LC74789JM ON-SCREEN DISPLAY IC, PDSO24
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LC74789 ON-SCREEN DISPLAY IC, PDIP24
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