16
R-204(W)
Pin No.
Signal
I/O
Description
8
P20
OUT
Magnetron high-voltage circuit driving signal.
To turn on and off the cook relay (RY2).
The signal holds "L" level during
microwave cooking and "H" level while
not cooking. In other cooking modes
(70%, 50%, 30%, 10%) the signal turns
to "H" level and "L" level in repetition
according to the power level.
9
D5
OUT
Digit selection signal.
Signal is input to the anodes of the light-emitting diodes (LD19 - LD24).
10
D4
OUT
Digit selection signal.
Signal is input to the anodes of the light-emitting diodes (LD13 - LD18).
11
D3
OUT
Digit selection signal.
Signal is input to the anodes of the light-emitting diodes (LD7 - LD12).
12
D2
OUT
Segment data signal.
Signal is input to the cathodes of the light-emitting diodes (LD6, LD12, LD18 and
LD24).
13
D1
OUT
Segment data signal.
Signal is input to the cathodes of the light-emitting diodes (LD5, LD11, LD17 and
LD23).
14
D0
OUT
Segment data signal.
Signal is input to the cathodes of the light-emitting diodes (LD4, LD10, LD16 and
LD22).
15
INT
IN
Signal coming from encoder.
When the encoder is turned, the contacts of encoder make pulse signals. And
pulse signals are input into INT.
16
CNTR
OUT
Signal to sound buzzer.
Completion sound.
17
P11
IN
Signal coming from encoder.
Signal similar to INT. Pulse signals are input into P11.
18
P10
OUT
Oven lamp, turntable motor and fan motor driving signal (Square Waveform
: 50Hz).
To turn on and off shut-off relay (RY1). The
square waveform voltage is delivered to the
relay (RY1) driving circuit and relay(RY2)
control circuit.
19
P03
OUT
Digit selection signal.
Signal is input to the anodes of the light-emitting diodes (LD1 - LD6).
20
P02
OUT
Segment data signal.
Signal is input to the cathodes of the light-emitting diodes (LD3, LD9, LD15 and
LD21).
21
P01
OUT
Segment data signal.
Signal is input to the cathodes of the light-emitting diodes (LD2, LD8, LD14 and
LD20).
22
P00
OUT
Segment data signal.
Signal is input to the cathodes of the light-emitting diodes (LD1, LD7, LD13 and
LD19).
23
AIN3
IN
Signal coming from potentiometer.
By inputting DC voltage corresponding to the power level set by the potentiometer,
this input is converted into the power level by the A/D converter built into the LSI.
24
AIN2
IN
Input signal which communicates the door open/close information to LSI.
Door closed; "H" level signal.
Door opened; "L" level signal.
ON/OFF time ratio in Mi-
cro cooking
(a. 32second time base)
MICRO
ON
OFF
COOK
100%
32sec.
0sec.
70%
24sec.
8sec.
50%
18sec.
14sec.
30%
12sec.
20sec.
10%
6sec.
26sec.
H: GND
L: -5V
2.0 sec
20 msec
During cooking
H
L
