LC74725 View Datasheet(PDF) - SANYO -> Panasonic
Part Name
Description
Manufacturer
LC74725 Datasheet PDF : 16 Pages
| |||
LC74725, 74725M
Second byte
DA0 to DA7
7
6
5
4
3
2
1
0
Register name
—
LC
HP5
(MSB)
HP4
HP3
HP2
HP1
HP0
(LSB)
State
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Register content
Function
Second byte identification bit
An LC oscillator is used for the dot clock.
A crystal oscillator is used for the dot clock.
If HS is the horizontal start position then:
5
HS = Tc × (2Σ 2nHPn)
n=0
Tc: Period of the oscillator connected to OSCIN/OSCOUT in
operating mode.
Note
Selects the dot clock used in horizontal
character display.
The horizontal display start position is
set by the 6 bits HP0 to HP5.
The weight of bit 1 is 2Tc.
| COMMAND4 (Display control setup command)
First byte
DA0 to DA7
7
6
5
4
3
2
1
0
Register name
—
—
—
—
TSTMOD
RAMERS
OSCSTP
SYSRST
State
1
1
0
0
0
1
0
1
0
1
0
1
Register content
Function
Command 4 identification code
Display control setup
Normal operating mode
Test mode
Erase display RAM (set to 3F hexadecimal)
Do not stop the crystal oscillator and LC oscillator circuits.
Stop the crystal oscillator and LC oscillator circuits.
Reset all registers and turn the display off.
Second byte
DA0 to DA7
7
6
5
4
3
2
1
0
Register name
—
EGL
NON
EG
BK1
BK0
RV
DSPON
State
0
0
1
0
1
0
1
0
1
Register content
Function
Second byte identification bit
Border level 0 (VBK0)
Border level 1 (VBK1)
Interlaced (262.5H per field)
Noninterlaced (263H per field)
Border off
Border on
Blinking period: about 0.5 s
Blinking period: about 1.0 s
0 Blinking off
1 Blinking on
0 Reverse (character reversing) off
1 Reverse (character reversing) on
0 Character display off
1 Character display on
Note
This bit must be zero.
The RAM erase operation requires about
500 µs (It is executed in the DSPOFF state.)
Valid when character display is off in
external synchronization mode.
Reset occurs when the CS1 pin is low, and
the reset is cleared when CS1 goes high.
Note
Switches the border level
Switches between interlaced and
noninterlaced
Switches the blinking period.
When blinking is specified for reversed
characters, the blinking will be between
normal character and reversed character
display.
No. 5213-11/16
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