R-21HT-F
R-21JV-F
19
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)
5-6
AN7-AN6
IN
Terminal not used.
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
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.
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
continuous 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 :
60Hz)
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
RELAY) 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.
Pin No.
Signal
I/O
Description
DESCRIPTION OF LSI
LSI
The I/O signal of the LSI is detailed in the following table.
+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
H
L
+5V
ß(60Hz)
P42
P43
P44
P45
GND