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DESCRIPTION OF LSI
LSI(IXA036DR)
The I/O signal of the LSI(IXA036DR) are detailed in the following table.
Pin No.
Signal
I/O
Description
1
AN0
IN
Used for initial balancing of the bridge circuit (absolute humidity sensor). This input
is an analog input terminal from the AH sensor circuit, and connected to the A/D
converter built into the LSI.
2
P77
OUT
Timing signal output terminal for temperature measurement(OVEN
THERMISTOR).
"H" level (GND) : Thermistor OPEN timing.
"L" level (-5V) : Temperature measuring timing. (Convection cooking)
3
P76
OUT
Timing signal output terminal for temperature measurement(OVEN
THERMISTOR).
"H" level (GND) : Thermistor OPEN timing.
"L" level (-5V) : Temperature measuring timing. (Convection cooking)
4-5
P75-P74
OUT
Terminal not used.
6
P73
IN
Signal coming from touch key.
When any one of G9 line keys on key matrix is touched, a corresponding signal
from P10, P11, P12, P13, P14, P15, P16 and P17 will be input into P73. When no
key is touched, the signal is held at "L" level.
7
P72
IN
Signal similar to P73.
When any one of G10 line keys on key matrix is touched, a corresponding signal
will be input into P72.
8
P71
IN
Signal similar to P73.
When any one of G11 line keys on key matrix is touched, a corresponding signal
will be input into P71.
9
P70
IN
Signal similar to P73.
When any one of G12 line keys on key matrix is touched, a corresponding signal
will be input into P70.
10-11
P57-P56
OUT
Terminal not used.
12
P55
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.
13-17
P54-P50
OUT
Used for initial balancing of the bridge circuit (absolute humidity sensor).
18
P47
OUT
Terminal not used.
19
P46
IN
Input signal which communicates the damper open/close information to LSI.
Damper opened; "H" level signal (0V:GND).
Damper closed; "L" level signal (-5V:VC).
20
P45
OUT
Terminal not used.
21
P44
OUT
Magnetron high-voltage circuit driving signal.
To turn on and off the cook relay
(RY2). In 100% 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.
22
INT1
OUT
Terminal not used.
23
INT0
IN
Signal to synchronized LSI with commercial power source frequency(50Hz).
This is basic timing for time processing
of LSI.
A
B
C
H: GND
L
0.12 sec
2.4 sec
1.2 sec
1.2 sec
20 msec.
H : GND
L (-5V)
ON/OFF time ratio in Mi-
cro cooking
(a. 32second time base)
ON/OFF time ratio in Mi-
cro cooking
(a. 48second time base)
MICRO
ON
OFF
COOK
100%
32 sec.
0 sec.
70%
24 sec.
8 sec.
50%
18 sec. 14 sec.
30%
12 sec. 20 sec.
10%
6 sec. 26 sec.
MICRO
ON
OFF
COOK
100%
48 sec.
0 sec.
70%
36 sec. 12 sec.
50%
26 sec. 22 sec.
30%
16 sec. 32 sec.
10%
8 sec. 40 sec.
