ML9203 データシートの表示（PDF） - Oki Electric Industry
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ML9203
Oki Electric Industry
ML9203 Datasheet PDF : 31 Pages
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¡ Semiconductor
ML9203-xx
PIN DESCRIPTION
Pin
Symbol Type Connects to
Description
1 to 15,
81 to 100 SEGA1 to A35 O
16 to 50 SEGB1 to B35
53 to 60
71 to 78
COM1 to 16
O
52, 79 ADA, ADB O
69
VDD
62
L-GND
—
51, 80
VDISP
61, 70
D-GND
68
DA
I
67
CP
I
66
CS
I
65
RESET
I
63
OSC0
I
64
OSC1
O
VFD tube
anode
electrode
VFD tube
grid
electrode
VFD tube
anode
electrode
Power
supply
VFD tube anode electrode drive output.
Directly connected to fluorescent display tube and a pull-down
resistor is not necessary. IOH>–5 mA
VFD tube grid electrode drive output.
Directly connected to fluorescent display tube and a pull-down
resistor is not necessary. IOH>–50 mA
VFD tube anode electrode drive output.
Directly connected to fluorescent display tube and a pull-down
resistor is not necessary. IOH>–20 mA
VDD-L-GND are power supplies for internal logic.
VDISP-D-GND are power supplies for driving fluorescent tubes.
Apply VDISP after VDD is applied.
Use the same power supply for L-GND and D-GND.
Micro-
controller
Micro-
controller
Micro-
controller
Micro-
controller
or
C, R
Crystal or
ceralock
resonator
Serial data input (positive logic).
Input from LSB.
Shift clock input.
Serial data is shifted on the rising edge of CP.
Chip select input.
Serial data transfer is disabled when CS pin is "H" level.
Reset input.
"Low" initializes all the functions.
Initial status is as follows.
• Address of each RAM
• Data of each RAM
address "00"H
Content is undefined
• Display digit
16 digits
• Brightness adjusment
0/1024
• All lights ON or OFF
OFF mode
For a circuit when R and C are connected externally,
see Application Circuit.
Pins for oscillation.
Connect crystal and capacitors or ceralock resonator and
capacitors. (Use a built-in feedback resistor.)
Set the target oscillation frequency to 4 MHz.
For an external circuit, see APPLICATION CIRCUIT.
5/30
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