NJU3426 NJR Corporation, NJU3426 Datasheet - Page 4

• Manufacturer Part Number: NJU3426
• Description: 16-SEGMENT × 14-Digit VFD Controller / Driver
• Manufacturer: NJR Corporation

NJU3426
(2) COMMAND REGISTER 1
Note.)
Note.)
- 4 -
The “Command register 1” is used for setting “Duty ratio for timing signal”, “Display control ON/OFF” and “Shifting
display digits”. When the upper 1 bit (B7) of the 1
command data, and stored in the “Command register 1”. Note that changing the “Duty ratio” or “Shifting display
digits” must be executed under the “Display control OFF”, otherwise it may cause flickering. The contents of the
“Command register 1” is initially set up at power-ON reset or reset signal, as shown below.
DEFAULT VALUES OF COMMAND REGISTER 1
The output wave forms of timing signal are shown in “
When the “Display control is OFF” is set, all output pins become in display OFF state.
Duty ratio for timing signal
Display control ON/OFF
Shifting display digits
MD2
Recognition data
DSP
DE2
0
0
0
0
1
1
1
1
0
1
0
0
0
0
1
1
1
1
MD1
DE1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
Display control
B7
1
OFF
ON
MD0
DT2
DE0
B6
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Duty ratio for
timing signal
DT1
Duty ratio for timing signal
B5
Shifting display digits
DT0
B4
: OFF
: 2/16
: 7
Display control
ON / OFF
10/16
12/16
14/16
15/16
2/16
4/16
6/16
8/16
10
11
12
13
14
7
8
9
DSP
B3
st
word is “1”, the lower 7 bits (B6 to B0) are recognized as
DE2
B2
TIMING SIGNAL / DUTY-CHANGE WAVEFORM”.
Shifting display digits
DE1
B1
DE0
B0
Ver.2003-03-06