lc74775 Sanyo Semiconductor Corporation, lc74775 Datasheet - Page 12

• Manufacturer Part Number: lc74775
• Description: Vps/pdc Video On-screen Display
• Manufacturer: Sanyo Semiconductor Corporation

COMMAND3 (Horizontal display start position and horizontal size setup command)
• First byte
• Second byte
Note: All registers are set to 0 when the LC74775/M is reset by the RST pin.
DA 0 to 7
DA 0 to 7
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
Register
Register
(MSB)
(LSB)
HS21
HS20
HS11
HS10
HP5
HP4
HP3
HP2
HP1
HP0
LC
–
–
–
–
–
State
State
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
1
0
1
1
0
1
0
1
0
1
0
1
If HS is the horizontal start position then:
HS = Tc
Tc: Period of the oscillator connected to OSCIN/OSCOUT
Second byte identification bit
Use the LC oscillator as the dot clock
Use the crystal oscillator as the dot clock
Command 3 identification code.
Horizontal display start position and the horizontal
character size setup.
VS21
VS11
in operating mode.
0
1
0
1
VS20
VS10
2
n=0
5
2 HP
LC74775, 74775M
n
n
Contents
Contents
Function
Function
1Tc/dot
3Tc/dot
1Tc/dot
3Tc/dot
0
0
2Tc/dot
1Tc/dot
2Tc/dot
1Tc/dot
1
1
Selects the dot clock used for character
display in the horizontal direction.
The horizontal display start position is set
by the 6 bits HP0 to HP5.
The weight of bit 1 is 2Tc.
Second line horizontal character size
First line horizontal character size
Notes
Notes
No. 5919-12/35