LC74721 查看數據表（PDF） - SANYO -> Panasonic
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LC74721 Datasheet PDF : 12 Pages
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LC74721, 74721M
COMMAND5: Synchronization Signal Control Setting Command
COMMAND5: first byte
DA0 to
DA7
0
1
Register name
INT
BCL
Status
0
1
0
1
Register Contents
Function
External synchronization
Internal synchronization
Background color available
Background color not available (background level only set)
0
PH1
PH0
Background color's phase
2
PH0
1
0
0
π/2
0
1
π
0
3
PH1
1
1
0
1
1
3π/2
In phase
4
1
5
0
COMMAND5 identification code
6
1
7
1
COMMAND5: second byte
DA0 to
DA7
0
1
2
3
4
5
6
7
Register name
SN0
SN1
SN2
SN3
RN0
RN1
RN2
Status
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
Register Contents
Function
SN3 SN2 SN1 SN0
0
0
0
0
0
0
0
1
0
0
1
0
0
1
0
0
1
0
0
0
Detection frequency
No detection
32 times
64 times
128 times
256 times
RN2
0
0
0
1
RN1
0
0
1
0
RN0
0
1
0
0
Second byte identification bit
Detection frequency
0 times
4 times
8 times
16 times
Note
On system reset with RST, the status of all registers is set to 0.
Remarks
Switches between external and
internal synchronization
Only available with internal
synchronization
Phase selection. In PAL-M mode,
there is only one background
color (blue-black). Otherwise,
there are 4 types
Remarks
External sync signal detection
control. Determines when the
signal goes from ON to OFF.
Selects the sampling period, in
units of the horizontal sync signal
cycle (1H), for which the sync
continues and cannot be detected.
External sync signal detection
control. Determines when the
signal goes from OFF to ON.
Selects the sampling period, in
units of the horizontal sync signal
cycle (1H), for which the sync
continues and can be detected.
No.4359–10/12
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