参数资料
型号: LC74794M
元件分类: 画面叠加
英文描述: ON-SCREEN DISPLAY IC, PDSO30
封装: MFP30S
文件页数: 3/30页
文件大小: 320K
代理商: LC74794M
No. 5557-11/30
LC74794, 74794M
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—
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
Command 3 identification code
Sets the horizontal display start position and the horizontal character size.
HS20
01
HS21
0
1Tc/dot
2Tc/dot
1
3Tc/dot
1Tc/dot
HS10
01
HS11
0
1Tc/dot
2Tc/dot
1
3Tc/dot
1Tc/dot
Second byte
Note: All registers are set to 0 when the LC74794/M is reset by the RST pin.
DA
Register
Contents
Notes
0 to 7
State
Function
7—
0
Second 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 Σ 2n HPn)
n = 0
Tc: Period of the oscillator connected to OSCIN/OSCOUT 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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