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CU40045-UW1J

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20
CU40045-UW1J
3
8. Block Diagram
Upper 2 lines are controlled by Controller 1 with E1 signal, and Lower 2 lines are controlled by
Controller 2 with E2 signal.
DC/DC Converter
＋5V
VCC
GND
Upper 2 lines
VFD(40X4)
Lower 2 lines
Controller 1
Protection circuit
F
1
F
2
V
D
D
2
V
D
D
1
OSC
DB0
～DB7
RS
R/W
E1
E2
NC/
RESET
JP1
Reset circuit
Controller 2
2
CU40045-UW1J
4
9. Functional Descriptions
9.1 Instruction table
CODE
Instruction
RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
Cycle
Time
Description
Display
clear
0 0 0 0 0 0 0 0 0 1
100 µs
Max.
Clears all display
and sets DD RAM
address 0 in the
address counter.
Cursor
home
0 0 0 0 0 0 0 0 1
*
666 ns
Sets DD RAM
address 0 in the
address counter.
Also returns
the display being
shifted to the
original position.
DD RAM contents
remain unchanged.
Entry
mode set
0 0 0 0 0 0 0 1 I/D S
666 ns
Sets the cursor
direction and
specifies display
shift. These
operations are
p
erformed during
writing/reading
data.
Display
ON/OFF
control
0 0 0 0 0 0 1 D C B
666 ns
Sets all display
ON/OFF(D),cursor
ON/OFF(C),cursor
blink of character
p
osition (B).
Cursor or
display
shift
0 0 0 0 0 1 S/C R/L
**
666 ns
Shifts display or
cursor,
keeping DD RAM
contents.
Function
set
0 0 0 0 1 IF
****
666 ns
Sets data length
( IF).
Bright-
ness
control
1 0
* * * * * *
BR1 BR0
666 ns
Accepts 1 byte
data of just after
"Function set"
as brightness
control data.
CU40045-UW1J
5
CODE
Instruction
RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
Cycle
Time
Description
CG RAM
address
setting
0 0 0 1 ACG
666 ns
Sets the CG
RAM address.
DD RAM
address
setting
0 0 1 ADD
666 ns
Sets the DD
RAM address.
Busy flag
& address
reading
0 1 BF ACC
666 ns
Reads busy flag
(BF) and
address counter.
Data
writing to
CG or DD
RAM
1 0 Data writing
666 ns
Writes data into
CG RAM
or DD RAM.
Data read-
ing from
CG or DD
RAM
1 1 Data reading
666 ns
Reads data from
CG RAM
or DD RAM.
I/D = 1 : Increment IF = 1 : 8-bits
I/D = 0 : Decrement IF = 0 : 4-bits
S = 1 : Display shift enabled BF = 1 : Busy
S = 0 : Cursor shift enabled BF = 0 : Not
S/C = 1 : Display shift busy
S/C = 0 : Cursor move
R/L = 1 : Shift to the right
R/L = 0 : Shift to the left
BR1,BR0 = 00 : 100%
01 : 75%
10 : 50%
11 : 25%
DD RAM:
Display
Data RAM
CG RAM:
Character
Generator
RAM
ACG: CG RAM
Address
ADD: DD RAM
Address
ACC: Address
Counter
Note:
* : don't care
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20

CU40045-UW1J

Mfr. #:
Buy CU40045-UW1J
Manufacturer:
Noritake
Description:
Vacuum Fluorescent Displays - VFD U-VERSION 40X4 137.4 X 23.2 DISP
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
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