R-15AT
17
7-8
AN5-AN4
IN
Terminal to change functions according to the model.
Signal in accordance with the model in operation is applied to set up its function.
9-10
AN3-AN2
IN
Terminal not used.
11
AN1
IN
Input signal which communicates the door open/close information to LSI.
Door closed; "L" level signal (0V).
Door opened; "H" level signal (+5V).
12
AN0
IN
Terminal not used.
13
P55
OUT
Magnetron high-voltage circuit driving signal.
To turn on and off the cook relay. In 100% power level operation, "H" level during
c o o k i n g ; " L " l e v e l o t h e r w i s e . I n o t h e r p o w e r l e v e l o p e r a t i o n
(90,80,70,60,50,40,30,20,10 or 0%), "H" and "L" level is repeated according to power
level.
Power level
ON
OFF
Power level
ON
OFF
100%
32sec. 0sec.
40%
16sec. 16sec.
90%
30sec. 2sec.
30%
12sec. 20sec.
80%
26sec. 6sec.
20%
8sec. 24sec.
70%
24sec. 8sec.
10%
6sec. 26sec.
60%
22sec. 10sec.
0%
0sec. 32sec.
50%
18sec. 14sec.
14-15
P54-P53
OUT
Terminal not used.
16-18
P52-P50
IN
Terminal not used.
19
P47
OUT
Signal to sound buzzer.
This signal is to control the 2.5kHz con-
tinuous signal through IC3.
A: key touch sound.
B: Guidance sound.
C: Completion sound.
20
P46
OUT
Oven lamp, Fan motor and Antenna motor driving signal. (Square Waveform :
50Hz)
To turn on and off the shut-off relay (RY3). The
Square waveform voltage is delivered to the
RY3 driving circuit and relays(RY2, COOK RE-
LAY) control circuit.
21
P45
OUT
Digit selection signal.
The relation between digit signal and digit are
as follows:
Digit signal
Digit
P42 ..................... 1st.
P43 .................... 2nd.
P44 ..................... 3rd.
P45 ..................... 4th.
Normally, one pulse is output in every ß
period, and input to the grid of the light-
emitting diode.
22-24
P44-P42
OUT
Digit selection signal.
Signal similar to P45.
25
INT1
IN
Signal synchronized with commercial power source frequency.
This is basic timing for all time processing of LSI.
26
P40
IN
Connected to GND through resistor.
Pin No.
Signal
I/O
Description
+5V
GND
32 sec.
ON
OFF
A
0.12 sec
2.4 sec
1.2 sec
+5V
GND
T
200
µ
sec.
200
µ
sec.
1.2 sec
B
+5V
GND
C
+5V
GND
H
L
20.0 msec
During cooking
H
L
+5V
ß(50Hz)
P42
P43
P44
P45
GND
H : +5V
L : GND
20 msec
