LC74776 Datasheet, PDF (11/35 Pages) Sanyo Semicon Device – On-Screen Display Controller IC

LC74776, 74776M
• Second byte
DA 0 to 7
7
6
5
4
3
2
1
0
Register
at
c6
c5
c4
c3
c2
c1
c0
State
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Contents
Function
Character attribute off
Character attribute on
Character code (00 to FF hexadecimal)
(FE_HEX: Space character)
(FF_HEX: Transparent space character)
Note: All registers are set to 0 when the LC74776/M is reset by the RST pin.
Notes
COMMAND2: Vertical display start position and vertical character size setup command
• First byte
DA 0 to 7
7
6
5
4
3
2
1
0
Register
–
–
–
–
VS21
VS20
VS11
VS10
State
1
0
1
0
0
1
0
1
0
1
0
1
Contents
Function
Command 2 identification code.
Vertical display start position and the vertical character
size setup.
VS20
VS21
0
1
VS10
VS11
0
1
0
1H/dot
3H/dot
0
1H/dot
3H/dot
1
2H/dot
1H/dot
1
2H/dot
1H/dot
Notes
Second line vertical character size
First line vertical character size
• Second byte
DA 0 to 7
Register
State
Contents
Function
7
–
0
Second byte identification bit
0
Crystal oscillator frequency: 2fsc
6
FS
1
Crystal oscillator frequency: 4fsc
VP5
0
If VS is the vertical display start position then:
5
5
(MSB)
1
VS = α +H × ^{2 ∑ 2n VP}n
n=0
4
VP4
0
H: The horizontal synchronization pulse period
1
α = 20H (525H systems)
0
α = 25H (625H systems)
3
VP3
1
0
2
VP2
1
0
1
VP1
1
Character display area
VP0
0
0
(LSB)
1
Note: All registers are set to 0 when the LC74776/M is reset by the RST pin.
Notes
The vertical display start position is set by the
6 bits VP0 to VP5.
The weight of bit 1 is 2H.
No. 6018-11/35