¡ Semiconductor
ML9206-xx
PIN DESCRIPTION
Pin
QFP SSOP
Symbol Type Connects to
Fluorescent
tube anode
electrode
Fluorescent
tube grid
electrode
Fluorescent
tube anode
electrode
LED drive
control
pins
Power
supply
Micro-
controller
Micro-
controller
Micro-
controller
Description
Fluorescent display tube anode electrode drive output.
Directly connected to fluorescent display tube and a pull-down
resistor is not necessary. I
OH
>–6
mA
Fluorescent display tube grid electrode drive output.
Directly connected to fluorescent display tube and a pull-down
resistor is not necessary. I
OH
>–30
mA
Fluorescent display tube anode electrode drive output.
Directly connected to fluorescent display tube and a pull-down
resistor is not necessary. I
OH
>–15
mA
General port output.
Output of these pins in static operation, so these pins can drive
the LED.
V
DD
-GND are power supplies for internal logic.
V
DD
-V
FL
are power supplies for driving fluorescent tubes.
Apply V
FL
after V
DD
is applied.
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 "00"H
• Address of each RAM
Content is undefined
• Data of each RAM
16 digits
• Display digit
0/256
• brightness adjusment
OFF mode
• All lights ON or OFF
"Low" level
• All outputs
RESET
C
2
R
2
(Circuit when R and C are
connected externally)
See Application Circuit.
1 to 31,
5 to 39 SEG1 to 35
61 to 64
O
32 to 47 40 to 55 COM1 to 16
O
59, 60
3, 4
AD1, AD2
O
57, 58
56
49
48
55
54
53
1, 2
64
57
56
63
62
61
P1, P2
V
DD
GND
V
FL
DA
CP
CS
O
—
I
I
I
52
60
RESET
I
Micro-
controller
or
C
2
, R
2
50
58
OSC0
I
C
1
, R
1
External RC pin for RC oscillation.
Connect R and C externally. The RC time constant depends on the
V
DD
voltage used. Set the target oscillation frequency to 2 MHz.
OSC0
R
1
OSC1
C
1
(RC oscillation circuit)
See Application Circuit.
51
59
OSC1
O
6/32
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