LC74731 データシートの表示（PDF） - SANYO -> Panasonic
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LC74731 Datasheet PDF : 38 Pages
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LC74731W,74732W
COMMAND50 (Sync signal detection 1 setup command)
• First byte
DA0 to 7
7
6
5
4
3
2
1
Register
—
—
—
—
—
—
DISLIN
0
I/E
State
1
1
0
1
0
0
0
1
0
1
Content
Function
Command 5 identification code
Sync signal control settings
Extended command 0 identification code
12 lines
10 lines
External synchronization
Internal synchronization
Notes
Switches the number of lines displayed.
Switches between internal and external
synchronization
• Second byte
DA0 to 7
7
6
Register
—
RN2
5
RN1
4
RN0
3
SN3
2
SN2
1
SN1
0
SN0
State
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Content
Function
Second byte identification bit
RN2 RN1 RN0 Number of times HSYNC detected
0
0
0 0 times (32 times)
0
0
1 4 times (64 times)
0
1
0 8 times (128 times)
1
0
0 16 times (256 times)
SN3 SN2 SN1 SN0
0000
0001
0010
0100
1000
Number of times HSYNC detected
Not detected
32 times
64 times
128 times
256 times
Note that all registers are set to 0 when these ICs are reset by the RST pin.
Notes
External sync signal detection control
Recognition of the transition from the no signal
state to the signal present state.
Sets the sampling period in which the sync signal
can be detected continuously in the horizontal sync
signal period (1H).
The values in parentheses apply when RNE0
(COM51) is 1.
External sync signal detection control
Recognition of the transition from the signal
present state to the no signal state.
Sets the sampling period time in which the sync
signal cannot be detected continuously in the
horizontal sync signal period (1H).
No. 6526-20/38
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