参数资料
型号: LC74789M
厂商: SANYO SEMICONDUCTOR CO LTD
元件分类: 画面叠加
英文描述: ON-SCREEN DISPLAY IC, PDSO24
封装: 0.375 INCH, PLASTIC, MFP-24
文件页数: 4/23页
文件大小: 209K
代理商: LC74789M
No. 5732-12/23
LC74789, 74789M, 74789JM
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
Command 3 identification code.
5
1
Sets the horizontal display start position and the horizontal character size.
4
1
3
HS21
0
1
Second line horizontal character size
2
HS20
0
1
HS11
0
1
First line horizontal character size
0
HS10
0
1
HS20
0
1
HS21
0
1 Tc/dot
2 Tc/dot
1
3 Tc/dot
1 Tc/dot
Second byte
DA
Register
Contents
Notes
0 to 7
State
Function
7
0
Second byte identification bit
6
LC
0
Use the LC oscillator for the dot clock
1
Use the crystal oscillator for the dot clock
5
HP5
0
If HS is the horizontal start position then:
(MSB)
1
HS =Tc
× (2Σ 2n HPn)
4
HP4
0
Tc: Period of the oscillator connected to OSCIN/OSCOUT in operating
1
mode.
3
HP3
0
1
2
HP2
0
1
HP1
0
1
0
HP0
0
(LSB)
1
Note: All registers are set to 0 when the LC74789/M/JM is reset by the RST pin.
5
n=0
HS10
0
1
HS11
0
1 Tc/dot
2 Tc/dot
1
3 Tc/dot
1 Tc/dot
The horizontal display start position is set by the 6
bits HP0 to HP5.
The weight of bit 1 is 2Tc.
Selects the dot clock used for character display in the
horizontal direction.
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