LC74794M 데이터 시트보기 (PDF) - SANYO -> Panasonic
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LC74794M Datasheet PDF : 30 Pages
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LC74794, 74794M
COMMAND6 (Synchronizing signal detection setup command)
First byte
DA
0 to 7
7
6
5
4
3
2
1
0
Register
—
—
—
—
SEL0
MOD0
DISLIN
MUT
State
1
1
1
0
0
1
0
1
0
1
0
1
Contents
Function
Command 6 identification code
Sets up synchronizing signal control.
Sync separator signal
Output signal set by MOD0
High-level output
ST pulse signal
12 lines
10 lines
Normal output
CVIN is cut and CVOUT is held at the pedestal level.
Second byte
DA
0 to 7
7
6
5
4
3
2
1
0
Register
—
RN2
RN1
RN0
SN3
SN2
SN1
SN0
State
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Contents
Function
Second byte identification bit
RN2
0
0
0
1
RN1
0
0
1
0
RN0
0
1
0
0
Number of times HSYNC detected
0 times
4 times
8 times
16 times
SN3 SN2 SN1 SN0
0
0
0
0
0
0
0
1
0
0
1
0
0
1
0
0
1
0
0
0
Number of times HSYNC detected
Not detected
32 times
64 times
128 times
256 times
Note: All registers are set to 0 when the LC74794/M is reset by the RST pin.
Notes
Switches the SEPOUT (pin 19) output.
Only valid when SEL0 is high.
Switches the number of lines displayed.
CVOUT switching
Notes
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).
No. 5557-14/30
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