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R-951M - 10
DESCRIPTION OF LSI
LSI(IZA880DR)
The I/O signal of the LSI(IZA880DR) are detailed in the following table.
Pin No.
Signal
I/O
Description
1
C1
IN
Terminal not used.
2
VL1
IN
Power source voltage input terminal.
Standard voltage for LCD.
3-6
AN7-AN4
IN
Heating constant compensation terminal.
7
AN3
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.
thermistor, this input is converted into temperature by the A/D converter built
into the LSI.
8
AN2
IN
Input signal which communicates the door open/close information to
LSI.
LSI.
Door closed; "H" level signal.
Door opened; "L" level signal.
Door opened; "L" level signal.
9-10
AN1-AN0
IN
Terminal not used.
11
P57
IN
Input signal which communicates the door open/close information to
LSI.
LSI.
Damper opened; "H" level signal (0V:GND).
Damper closed; "L" level signal (-5V:VC).
Damper closed; "L" level signal (-5V:VC).
12
P56
OUT
Signal to sound buzzer.
A: key touch sound.
B: Completion sound.
C: When the temperature of the oven
B: Completion sound.
C: When the temperature of the oven
cavity reaches the preset
temperature in the preheating
mode, or when the preheating hold
time (30 minutes) is elapsed.
temperature in the preheating
mode, or when the preheating hold
time (30 minutes) is elapsed.
13
P55
Terminal not used.
14-18
P54-P50
OUT
Terminal not used.
19
P47
OUT
Oven lamp and turntable 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 relays (RY2,RY3,RY4)
control circuit.
The square waveform voltage is
delivered to the relay (RY1) driving
circuit and relays (RY2,RY3,RY4)
control circuit.
20
P46
IN/OUT
Terminal not used.
21
P45
OUT
Back light driving signal.
To change the brightness of the back light (Light emitting diodes LD1 - LD5).
The square waveform voltage is delivered to the back light driving circuit.
The square waveform voltage is delivered to the back light driving circuit.
22
P44
OUT
Timing signal output terminal for temperature measurement (oven).
"H" level (GND) : Thermistor OPEN timing.
"L" level (-5V) : Temperature measuring timing.
"L" level (-5V) : Temperature measuring timing.
23
INT1
IN
Terminal not used.
24
INT0
IN
Signal to synchronized LSI with commercial power source
frequency(50Hz).
frequency(50Hz).
This is basic timing for time processing of LSI.
25
P41
IN
Terminal not used.
26
P40
OUT
Signal similar to P44.
Timing signal output terminal for temperature measurement.
27
P77
OUT
Convection heating element driving signal.
To turn on and off the heating element
relay (RY3). "L" level during convection
cooking or dual cooking, "H" level
otherwise.
relay (RY3). "L" level during convection
cooking or dual cooking, "H" level
otherwise.
A
B
C
H: GND
L
0.12 sec
2.4 sec
1.2 sec
1.2 sec
20 msec
During cooking
H
L
20 msec
H : GND
L (-5V)
ON
OFF
During
cooking
L
GND
H.
(Convection or dual)
TOUCH CONTROL
CONT
...
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