ML9204 データシートの表示（PDF） - Oki Electric Industry
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ML9204
Oki Electric Industry
ML9204 Datasheet PDF : 41 Pages
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OKI Semiconductor
PEDL9204-02
ML9204-xx
PIN DESCRIPTION
Pin
33 to 67
1 to 6
100 to
128
8 to 31
Symbol
SEGA1 to A35
SEGB1 to B35
COM1 to 24
Type
O
O
Connects to
VFD tube anode
electrode
VFD tube grid
electrode
Description
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 < –25 mA
68
99
ADA
ADB
O
VFD tube anode
electrode
VFD tube anode electrode drive output.
Directly connected to fluorescent display tube and a
pull-down resistor is not necessary. IOH < –15 mA
96
71
7,32
69,98
70,97
94
93
92
VDD
L-GND
VCOM
VSEG
D-GND
DI/O
CP
CS
VDD-L-GND are power supplies for internal logic.
VCOM-D-GND are power supplies for driving VFD tube
grid.
— Power supply
VCOM-D-GND are power supplies for driving VFD tube
anode.
Use the same power supply for L-GND and D-GND.
Serial data input-output (positive logic).
I/O
Micro controller
Data is input and output to sift register synchronized
with the rise of shift clock.
When Inputting data input from the LSB.
l
Micro controller
Shift clock input.
Serial data is shifted on the rising edge of CP.
Chip select input.
l
Micro controller Serial data transfer is disabled when CS pin is “H” level.
95
85,86
87,88
89,90
INT
A1,B1
A2,B2
A3,B3
Output pin for interrupt signal to micro controller.
When depression or release of key matrix switch is
detected, key scanning starts and when 1 cycle is
O Micro controller completed, this pin becomes high level. Upon receiving
encoder type rotary switch input, this pin becomes high
level. The INT pin remains at high level until the key
scan stop mode is selected..
Encoder type rotary switch input pins.
All inputs possess chattering absorption function of
l
Rotary switch 256us period.
Those inputs must be tied to ground when they are
not used.
79 to 84 COL1 to 6
I
Key matrix
Input pins for return signal from key matrix with built-in
pull-up resister.
When input is low level, the key matrix switch is
regarded as being pressed.
Dose not have chattering absorption function.
4/41
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