参数资料
型号: LC74776M
元件分类: 画面叠加
英文描述: ON-SCREEN DISPLAY IC, PDSO30
封装: MFP30S
文件页数: 3/35页
文件大小: 253K
代理商: LC74776M
No. 6018-11/35
LC74776, 74776M
DA 0 to 7
Register
Contents
Notes
State
Function
7
at
0
Character attribute off
1
Character attribute on
6
c6
0
1
5
c5
0
1
4
c4
0
1
Character code (00 to FF hexadecimal)
3
c3
0
1
2
c2
0
(FEHEX: Space character)
1
(FFHEX: Transparent space character)
1
c1
0
1
0
c0
0
1
Second byte
Note: All registers are set to 0 when the LC74776/M is reset by the RST pin.
DA 0 to 7
Register
Contents
Notes
State
Function
7
1
6
0
Command 2 identification code.
5
1
Vertical display start position and the vertical character
4
0
size setup.
3
VS21
0
1
Second line vertical character size
2
VS20
0
1
VS11
0
1
First line vertical character size
0
VS10
0
1
COMMAND2: Vertical display start position and vertical character size setup command
VS20
0
1
VS21
0
1H/dot
2H/dot
1
3H/dot
1H/dot
VS10
0
1
VS11
0
1H/dot
2H/dot
1
3H/dot
1H/dot
DA 0 to 7
Register
Contents
Notes
State
Function
7
0
Second byte identification bit
6
FS
0
Crystal oscillator frequency: 2fsc
1
Crystal oscillator frequency: 4fsc
5
VP5
0
(MSB)
1
4
VP4
0
1
3
VP3
0
The vertical display start position is set by the
1
6 bits VP0 to VP5.
2
VP2
0
The weight of bit 1 is 2H.
1
VP1
0
1
0
VP0
0
(LSB)
1
Second byte
If VS is the vertical display start position then:
VS =
α +H ×
H: The horizontal synchronization pulse period
α = 20H (525H systems)
α = 25H (625H systems)
2
2 VPn
5
n
n=0
Character display area
Note: All registers are set to 0 when the LC74776/M is reset by the RST pin.
First byte
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