參數(shù)資料
型號: LC74794
廠商: Sanyo Electric Co.,Ltd.
英文描述: On-Screen Display Controller LSI(用于屏幕顯示控制器規(guī)模集成電路(LSI))
中文描述: 屏幕顯示控制器芯片(用于屏幕顯示控制器規(guī)模集成電路(LSI)的)
文件頁數(shù): 10/30頁
文件大?。?/td> 217K
代理商: LC74794
No. 5557-10/30
LC74794, 74794M
Second byte
Note: All registers are set to 0 when the LC74794/M is reset by the RST pin.
DA
0 to 7
Register
Contents
Notes
State
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Function
7
at
Character attribute off
Character attribute on
6
c6
5
c5
4
c4
3
c3
Character code (00 to 7F hexadecimal)
2
c2
1
c1
0
c0
Second byte
DA
0 to 7
7
Register
Contents
Notes
State
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Function
Second byte identification bit
Crystal oscillator frequency: 2fsc
Crystal oscillator frequency: 4fsc
If VS is the vertical display start position then:
5
VS = H
×
(2
2
n
VP
n
)
n = 0
H: the horizontal synchronization pulse period
6
FS
5
VP5
(MSB)
4
VP4
3
VP3
2
VP2
1
VP1
0
VP0
(LSB)
COMMAND2 (Vertical display start position and vertical character size setup command)
First byte
DA
0 to 7
7
6
5
4
Register
Contents
Notes
State
1
0
1
0
0
1
0
1
0
1
0
1
Function
3
VS21
Second line vertical character size
2
VS20
1
VS11
First line vertical character size
0
VS10
Command 2 identification code
Sets the vertical display start position and the vertical character size
VS20
0
1
VS21
0
1
1H/dot
3H/dot
2H/dot
1H/dot
VS10
0
1
VS11
0
1
1H/dot
3H/dot
2H/dot
1H/dot
The vertical display start position is set by the
6 bits VP0 to VP5.
The weight of bit 1 is 2H.
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