R-22JT
21
Pin No.
Signal
I/O
Description
DESCRIPTION OF LSI
LSI(IZA633DR)
The I/O signal of the LSI(IZA633DR) is detailed in the following table.
1
VCC
IN
Power source voltage: +5V.
VC voltage of power source circuit input.
2/3
VEE/AVSS
IN
Connected to GND
4
VREF
IN
Connected to VC. (+5V)
5
AN7
IN
Temperature measurement input: INTAKE THERMISTOR.
By inputting DC voltage corresponding to the temperature detected by the thermistor, this input
is converted into temperature by the A/D converter built into the LSI.
6
AN6
IN
Connected to GND.
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
AN3
IN
A/D input for troubleshooting Magnetron 1. and/or Magnetron 2.
10
AN2
IN
Temperature measurement input: OVEN THERMISTOR.
By inputting DC voltage corresponding to the temperature detected by the thermistor, this input
is converted into temperature by the A/D converter built into the LSI.
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
Temperature measurement input: FAN LOCK THERMISTOR.
By inputting DC voltage corresponding to the temperature detected by the thermistor, this input
is converted into temperature by the A/D converter built into the LSI.
13-14
P55-P54
OUT
Magnetron high-voltage circuit driving signal.
To turn on and off the cook relay. In 100% power level operation, "H" level during cooking; "L" level
otherwise. In other power level operation (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.
15
P53
OUT
Oven thermistor circuit power supply control signal.
Output the "H" signal to supply power to oven thermistor circuit about 1.7msec. after plugging in.
16-18
P52-P50
IN
Terminal not used.
19
P47
OUT
Signal to sound buzzer.
This signal is to control the 2.5kHz continuous signal through IC3.
A: key touch sound.
B: Guydance sound.
C: Completion sound.
20
P46
OUT
Oven lamp, Blower motor and Stirrer motor driving signal. (Square Waveform : 60Hz)
To turn on and off the shut-off relay (RY1). The Square waveform voltage is delivered to the RY1
driving circuit and relays(RY2,RY3,COOK RELAY) control circuit.
+5V
GND
32 sec.
ON
OFF
A
0.1 sec
2 sec
1 sec
+5V
GND
T
200µsec.
200µsec.
1 sec
B
+5V
GND
C
+5V
GND
H
L
16.7 msec
During cooking
