LC74798 Просмотр технического описания (PDF) - SANYO -> Panasonic
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производитель
LC74798 Datasheet PDF : 32 Pages
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LC74798, 74798M
• Second byte
DA
0 to 7
Register
State
Contents
Function
7
at
0 Character attribute off
1 Character attribute on
0
6
c6
1
0
5
c5
1
0
4
c4
1
3
c3
0
Character code (00 to 7F hexadecimal)
1
0
2
c2
1
0
1
c1
1
0
0
c0
1
Note: All registers are set to 0 when the LC74798/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
Register
—
—
—
—
3
VS21
2
VS20
1
VS11
0
VS10
State
1
0
1
0
0
1
0
1
0
1
0
1
Contents
Function
Command 2 identification code.
Sets the vertical display start position and the vertical character size.
VS21
VS20
0
1
VS11
VS10
0
1
0
1H/dot
3H/dot
0
1H/dot
3H/dot
1
2H/dot
1H/dot
1
2H/dot
1H/dot
• Second byte
DA
0 to 7
Register
State
Contents
Function
7
—
0 Second byte identification bit
6
FS
VP5
5
(MSB)
4
VP4
0 Crystal oscillator frequency: 2fsc
1 Crystal oscillator frequency: 4fsc
0
1
If VS is the vertical display start position then:
( ) VS = H ×
2
5
∑
2n
VPn
n=0
0 H: the horizontal synchronization pulse period
1
0
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 LC74798/M is reset by the RST pin.
Notes
Second line vertical character size
First line vertical character size
Notes
The vertical display start position is set by the 6
bits VP0 to VP5.
The weight of bit 1 is 2H.
No. 5833-10/32
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