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TOUCH CONTROL / DESCRIPTION OF LSI
LSI(IZA929DR)
The I/O signal of the LSI(IZA929DR) are detailed in the following table.
Pin No.
Signal
1
C1
2
VL1
3-6
AN7-AN4
7
AN3
8
AN2
9
AN1
10
AN0
11-12
P57-P56
13
P55
14
CNTR0
15
P53
16
P52
17
P51
18
P50
I/O
IN
Terminal not used.
IN
Power source voltage input terminal.
Standard voltage for LCD.
IN
Terminal to change cooking constant.
IN
Terminal not used.
IN
Input signal which communicates the door open/close information to LSI.
Door closed; "H" level signal.
Door opened; "L" level signal.
IN
Terminal not used.
IN
Temperature measurement input: OVEN THERMISTOR.
By inputting DC voltage corresponding to the temperature detected by the
thermistor, this input is converted temperature by the A/D converter built into the
LSI.
OUT
Timing signal output terminal for temperature measurement (OVEN).
"L" level (-5V) : Temperature measuring timing. (Oven cooking)
"H" level (GND) : Thermistor open timing.
OUT
Fan motor driving signal.
To turn on and off the fan motor relay
RY5. "L" level during cooking, or for 5
minutes or more after grill cooking or
dual cooking. "H" level otherwise.
OUT
Signal to sound buzzer.
A: key touch sound.
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.
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.
OUT
Bottom heating element driving signal.
To turn on and off the bottom element relay
(RY4). "L" level during grill (BOTTOM
HEATER, TOP AND BOTTOM) cooking or
dual (Dual 2) cooking; "H" level otherwise.
OUT
Grill heating element (TOP GRILL) driving signal.
To turn on and off the grill heating element
relay (RY3). "L" level during grill (TOP
GRILL, TOP AND BOTTOM) cooking or
dual (Dual 1) cooking; "H" level otherwise.
OUT
Magnetron high-voltage circuit driving signal.
To turn on and off the cook
relay (RY2). In 100% POWER
operation, the signals hold "L"
level during microwave cooking
and "H" level while not
cooking. In other cooking
modes (70%, 50%, 30%, 10%)
the signal turns to "H" level and
"L" level in repetition
according to the power level.
771M -
Description
ON
A
B
C
ON/OFF time ratio in Mi-
cro cooking
(a. 32second time base)
MICRO
ON
COOK
100%
32sec.
70%
24sec.
50%
18sec.
30%
12sec.
10%
6sec.
10
H.
GND
OFF
L
During cooking, or for 5 minutes or more
after grill cooking or dual cooking
0.12 sec
2.4 sec
1.2 sec
1.2 sec
20 msec
During cooking
During
H.
OFF
cooking
(Grill or dual)
ON
L
During
H.
OFF
cooking
(Grill or dual)
ON
L
ON/OFF time ratio in Mi-
cro cooking
(a. 48second time base)
OFF
MICRO
ON
COOK
0sec.
100%
48sec.
8sec.
70%
36sec.
14sec.
50%
26sec.
20sec.
30%
16sec.
26sec.
10%
8sec.
H: GND
L
H
L
GND
GND
OFF
0sec.
12sec.
22sec.
32sec.
40sec.
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