參數(shù)資料
型號: LC74731W
廠商: SANYO SEMICONDUCTOR CO LTD
元件分類: 畫面疊加
英文描述: ON-SCREEN DISPLAY IC, PQFP64
封裝: SQFP-64
文件頁數(shù): 13/38頁
文件大?。?/td> 153K
代理商: LC74731W
No. 6526-20/38
LC74731W
COMMAND50 (Sync signal detection 1 setup command)
First byte
DA0 to 7
Register
Content
Notes
State
Function
7
1
Command 5 identification code
6
1
Sync signal control settings
5—
0
4—
1
3
0
Extended command 0 identification code
2—
0
1
DISLIN
0
12 lines
Switches the number of lines displayed.
1
10 lines
0
I/E
0
External synchronization
Switches between internal and external
1
Internal synchronization
synchronization
Second byte
Note that all registers are set to 0 when the LC74731W is reset by the RST pin.
DA0 to 7
Register
Content
Notes
State
Function
7
0
Second byte identification bit
6
RN2
0
RN2
RN1
RN0
Number of times HSYNC detected
1
0
0 times (32 times)
5
RN1
0
1
4 times (64 times)
1
0
1
0
8 times (128 times)
4
RN0
0
1
0
16 times (256 times)
1
3
SN3
0
SN3 SN2 SN1 SN0
Number of times HSYNC detected
1
0
Not detected
2
SN2
0
1
32 times
1
0
1
0
64 times
1
SN1
0
1
0
128 times
1
0
256 times
0
SN0
0
1
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).
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