參數(shù)資料
型號: LC74730M
廠商: Sanyo Electric Co.,Ltd.
英文描述: On-Screen Display Controller LSI
中文描述: 屏幕顯示控制器芯片
文件頁數(shù): 10/14頁
文件大?。?/td> 145K
代理商: LC74730M
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COMMAND 5 (Synchronizing signal control setup command)
First byte
Second byte
Note: All these registers are set to 0 by a reset due to the RST pin.
Display Screen Organization
The display screen consists of 10 lines of 24 characters each. Thus the maximum number of characters that can be
displayed is 240 characters. However, the maximum number of characters that can be displayed may be fewer than 240
when characters are enlarged. The display memory address consists of a line address (with values from 0 to 9 decimal),
and a column (character position) address (with values from 0 to 23 decimal).
No. 4247-10/14
LC74730M
Register content
DA0 to DA7
Register name
State
Function
Note
7
0
Second byte identification bit
6
0
5
0
4
0
3
SN3
0
1
2
SN2
0
1
1
SN1
0
1
0
SN0
0
1
External synchronizing signal detection
control
SN3 SN2 SN1 SN0
Number of times HSYNC detected
0
0
0
0
Not detected
0
0
0
1
16 times
0
0
1
0
32 times
0
1
0
0
64 times
1
0
0
0
128 times
Register content
DA0 to DA7
Register name
State
Function
Note
7
1
6
1
Command 5 identification code
Sets up control of the synchronizing signals
5
0
4
1
0
3
PH1
1
0
2
PH0
1
1
BCL
0
Background color displayed.
Valid only in internal synchronization
mode
1
No background color (only the background level is set).
0
INT
0
External synchronization
Switches between internal and external
synchronization.
1
Internal synchronization
Sets the background color
(one of 4 colors).
There is only one background color
(blue) in PAL-M mode.
PHASE1 PHASE0
Background color (phase)
π
/2
π
3
π
/2
In phase
0
0
0
1
1
0
1
1
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