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| 型号： | LC74798M |
| 元件分类： | 画面叠加 |
| 英文描述： | ON-SCREEN DISPLAY IC, PDSO30 |
| 封装： | 0.375 INCH, MFP-30 |
| 文件页数： | 3/32页 |
| 文件大小： | 322K |
| 代理商： | LC74798M |
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No. 5833-11/32
LC74798, 74798M
COMMAND3 (Horizontal display start position and horizontal size setup command)
First byte
DA
Register
Contents
Notes
0 to 7
State
Function
7—
1
6—
0
5—
1
4—
0
3
HS21
0
1
2
HS20
0
1
HS11
0
1
0
HS10
0
1
Command 3 identification code.
Sets the horizontal display start position and the horizontal character
size.
Second line horizontal character size
First line horizontal character size
01
0
1Tc/dot
2Tc/dot
1
3Tc/dot
1Tc/dot
HS21
HS20
01
0
1Tc/dot
2Tc/dot
1
3Tc/dot
1Tc/dot
HS11
HS10
Second byte
Note: All registers are set to 0 when the LC74798/M is reset by the RST pin.
DA
Register
Contents
Notes
0 to 7
State
Function
7—
0Second byte identification bit
6—
0
5
HP5
0
(MSB)
1
4
HP4
0
1
3
HP3
0
1
2
HP2
0
1
HP1
0
1
0
HP0
0
(LSB)
1
If HS is the horizontal start position then:
5
HS = Tc ×
(2 ∑ 2n VPn)
n=0
Tc: Period of the oscillator in operating mode.
The horizontal display start position is set by the 6
bits HP0 to HP5.
The weight of bit 1 is 2Tc.
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