LC74784 View Datasheet(PDF) - SANYO -> Panasonic
Part Name
Description
Manufacturer
LC74784 Datasheet PDF : 17 Pages
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LC74784, 74784M
Second byte
DA0 to DA7 Register name
State
Register content
Function
7
—
0 Second byte identification bit
0 Crystal oscillator frequency: 2fsc
6
FS
1 Crystal oscillator frequency: 4fsc
5
VP5
(MSB)
0
If VS is the vertical display start position then:
1
0
5
VS
=
H
×
(2Σ
n=
20nVPn)
4
VP4
1
H: the horizontal synchronization pulse period
0
3
VP3
1
0
2
VP2
1
0
1
VP1
1
0
VP0
0
(LSB)
1
Note: The register states are all set to zero when the LC74784/M is reset with the RST pin.
Note
The vertical display start position is set
by the 6 bits VP0 to VP5.
The weight of bit 1 is 2H.
COMMAND3 (Horizontal display start position and horizontal character size setup command)
First byte
DA0 to DA7
7
6
5
4
3
2
1
0
Register name
—
—
—
—
HS21
HS20
HS11
HS10
State
1
0
1
1
0
1
0
1
0
1
0
1
Register content
Function
Command 3 identification code
Set the horizontal display start position and horizontal
character size.
HS21
HS20
0
0
1 Tc per dot
1
3 Tc per dot
HS11
HS10
0
0
1 Tc per dot
1
3 Tc per dot
1
2 Tc per dot
1 Tc per dot
1
2 Tc per dot
1 Tc per dot
Note
Second line horizontal character size
First line horizontal character size
Second byte
DA0 to DA7 Register name
State
Register content
Function
7
—
0 Second byte identification bit
0 An LC oscillator is used for the dot clock.
6
LC
1 A crystal oscillator is used for the dot clock.
5
HP5
(MSB)
0
If HS is the horizontal start position then:
1
0
HS
=
Tc
×
5
(2Σ
n=
20nHPn)
4
HP4
1
Tc: Period of the oscillator connected to OSCIN/OSCOUT in
0
operating mode.
3
HP3
1
0
2
HP2
1
0
1
HP1
1
0
HP0
0
(LSB)
1
Note: The register states are all set to zero when the LC74784/M is reset with the RST pin.
Note
Selects the dot clock used in horizontal
character display.
The horizontal display start position is
set by the six bits HP5 to HP0.
The weight of bit 1 is 2Tc.
No. 4991-10/15
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