參數(shù)資料
型號(hào): 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): 8/14頁
文件大?。?/td> 145K
代理商: LC74730M
Second byte
Note: All these registers are set to 0 by a reset due to the RST pin.
{
COMMAND 3 (Horizontal display start position and horizontal size setup command)
First byte
Second byte
Note: All these registers are set to 0 by a reset due to the RST pin.
No. 4247-8/14
LC74730M
Register content
DA0 to DA7
Register name
State
Function
Note
7
0
Second byte identification bit
6
0
5
HP5
(MSB)
0
1
4
HP4
0
1
3
HP3
0
1
2
HP2
0
1
1
HP1
0
1
0
HP0
(LSB)
0
1
The horizontal display start position is
specified by the 6 bits HP0 to HP5.
The weight of the low-order bit is 2 Tc.
If HS is the horizontal start position then:
5
HS = Tc
×
(2
2
n
HP
n
)
n = 0
Where Tc is a single period of the LC oscillator connected the
OSC
IN
and OSC
OUT
pins.
Register content
DA0 to DA7
Register name
State
Function
Note
7
0
Second byte identification bit
6
0
5
VP5
(MSB)
0
1
4
VP4
0
1
3
VP3
0
1
2
VP2
0
1
1
VP1
0
1
0
VP0
(LSB)
0
1
The vertical display start position is
specified by the 6 bits VP0 to VP5.
The weight of the low-order bit is 2 H.
If VS is the vertical display start position then:
5
VS = H
×
(2
2
n
VP
n
)
n = 0
Where H is horizontal period pulse period.
Register content
DA0 to DA7
Register name
State
Function
Note
7
1
6
0
Command 3 identification code
Sets up the horizontal display position and the character size
in the horizontal direction.
5
1
4
1
3
HS21
0
1
Horizontal character size for the
second line
2
HS20
0
1
1
HS11
0
1
Horizontal character size for the first line
0
HS10
0
1
HS21
HS20
0
1
0
1 Tc per dot
2 Tc per dot
1
3 Tc per dot
1 Tc per dot
HS11
HS10
0
1
0
1 Tc per dot
2 Tc per dot
1
3 Tc per dot
1 Tc per dot
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