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Description of LSI
The I/O signals of the LSI(IXA103DR) are detailed in the following table.
Pin# Signal
I/O
1
VCC
IN
2
VEE
IN
3
AVSS
IN
4
VREF
IN
Reference voltage input terminal.
A reference voltage applied to the A/D converter in the LSI. Connected to GND.(0V)
5
AN7
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.
6
AN6
IN
AH sensor input.
This input is an analog input terminal from the AH sensor circuit, and connected to
the A/D converter built into the LSI.
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; "H" level signal(0V).
Door opened; "L" level signal(-5V).
11
AN1
OUT
Input signal which communicates the damper open/close information to LSI.
Damper opened; "H" level signal(0V:GND).
Damper closed; "L" level signal(-5V).
12
AN0
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.
13
P55
OUT
Digit selection signal.
The relationship between digit signal and digit are as follows;
Digit signal
P03 ............................. 1st.
P02 ............................ 2nd.
P01 ............................. 3rd.
P00 ............................. 4th.
P37 ............................. 5th.
P36 ............................ 6th.
P35 ............................ 7th.
P55 ............................ 8th.
Normally, one pulse is output in every ß
period, and input to the grid of the Fluorescent
Display.
14
P54
OUT
Oven lamp and turntable 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.
RY1 driving circuit and RY2 control circuit.
Convection motor driving signal.
15
P53
OUT
To turn on and off shut-off relay(RY5). "L" level
during CONVECTION; "H" level otherwise.
Cooling fan motor driving signal.
16
P52
OUT
To turn on and off shut-off relay(RY6). "L" level during both
microwave and convection cooking; "H" level otherwise.
Description
Connected to GND.
Anode (segment) of Fluorescent Display light-up voltage: -30V.
Vp voltage of power source circuit input.
Power source voltage: -5V.
VC voltage of power source circuit input.
Digit
Troubleshooting and Testing
3-17
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