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R-1480
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DESCRIPTION OF LSI
LSI(IZA876DR)
The I/O signals of the LSI(IZA876DR) are detailed in the following table.
Pin No. Signal I/O Description
1 VCC IN Connected to GND.
2 VEE IN
Anode (segment) of Fluorescent Display illumination voltage: -31V.
Vp voltage of power source circuit input.
3 AVSS IN
Power source voltage:-5V.
VC voltage of power source circuit input.
4 VREF IN
Reference voltage input terminal.
A reference voltage applied to the A/D converter in the LSI. Connected to GND.(0V)
5-6 AN7-AN6 IN Terminal not used.
7-9 AN5-AN3 IN Heating constant compensation terminal.
10 AN2 IN
Input signal which communicates the door open/close information to LSI.
Door closed; "L" level signal(0V).
Door opened; "H" level signal(-5V).
11-12 AN1-AN0 IN Connected to GND(0V).
13 P55 OUT Terminal not used.
14 P54 OUT
Oven lamp, Stirrer motor and Fan motor driving signal. (Square Waveform : 60Hz)
To turn on and off the shut-off relay(RY1). The
square waveform voltage is delivered to the
relay(RY1) driving circuit.
15 P53 OUT Turntable motor driving signal.
To turn on and off relay(RY3). "L" level: During
Turntable ON. "H" level: During Turntable OFF or
during the oven is off condition.
16 P52 OUT Terminal not used.
17 P51 OUT Magnetron high-voltage circuit driving signal.
To turn on and off the cook
relay(RY2). In P-HI operation, the
signals holds "L" level during mi-
crowave cooking and "H" level
while not cooking. In other cook-
ing modes (P-90,P-80,P-70,P-
60,P-50,P-40,P-30,P-20,P-10,P-
0) the signal turns to "H" level and
"L" level in repetition according to
the power level.
18 P50 OUT Terminal not used.
19 P47 OUT
Hood lamp driving signal.
To turn on and off solid state relay(SSR1). "1"
level: During Hood lamp ON (WORK LIGHT level).
"2" level: During Hood lamp ON (NIGHT LIGHT
level). "H" level: During Hood lamp OFF.
20 P46 OUT Hood motor driving signal.
To turn on and off relay(RY9). "L" level: During Hood
motor ON. "H" level: During Hood motor OFF.
21 P45 OUT
Hood motor high / low driving signal.
To turn on and off relay(RY5). "L" level: During Hood
motor high. "H" level: During Hood motor low.
ON
OFF
H : GND
L
During cooking
L
H
16.7 msec.
VARI-MODE ON TIME OFF TIME
P-HI (100% power) 32 sec. 0 sec.
P-90 (approx. 90% power) 30 sec. 2 sec.
P-80 (approx. 80% power) 26 sec. 6 sec.
P-70 (approx. 70% power) 24 sec. 8 sec.
P-60 (approx. 60% power) 22 sec. 10 sec.
P-50 (approx. 50% power) 18 sec. 14 sec.
P-40 (approx. 40% power) 16 sec. 16 sec.
P-30 (approx. 30% power) 12 sec. 20 sec.
P-20 (approx. 20% power) 8 sec. 24 sec.
P-10 (approx. 10% power) 6 sec. 26 sec.
P-0 (0% power) 0 sec. 32 sec.
L
1
H
L
AC
CURRENT
WORK
LIGHT
NIGHT
LIGHT
H
2
ON
OFF
H : GND
L
ON
OFF
H : GND
L