28
PMOR30B
PMOR30R
PMOR30S
DESCRIPTION OF LSI
LSI(IZA958DR)
The I/O signal of the LSI(IZA958DR) is detailed in the following table.
Pin No.
Signal
I/O
Description
1
TIOCA2
OUT
Power level data output signal for inverter unit.
The power level will be decided by the time ratio
of T1 and T2.
2
A20
OUT
Terminal not used.
3
Vcc
IN
Power source voltage : +5.0V.
The power source voltage to drive LSI is input to Vcc terminal. Connected to Vcc.
4
TMO0
OUT
Signal to sound buzzer.
A: key touch sound (short beep). B: Completion sound (melody or long beep).
5
PB1
IN
Signal coming from touch key.
When either G11 line on key matrix is touched, a corresponding signal out of P93, P94,
P95, P40, P41, P42, P43 and P44 will be input into PB1. When no key is touched, the
signal is held at "H" level.
6
PB2
IN
Signal similar to PB1.
When either G12 line on key matrix is touched, a corresponding signal will be input into PB2.
7
PB3
IN
Signal similar to PB1.
When either G13 line on key matrix is touched, a corresponding signal will be input into PB3.
8
PB4
IN
Signal similar to PB1.
When either G6 line on key matrix is touched, a corresponding signal will be input into PB4.
9
PB5
IN
Signal similar to PB1.
When either G5 line on key matrix is touched, a corresponding signal will be input into PB5.
10
PB6
OUT
Terminal not used. Connected to test point.
11
PB7
OUT
Turntable motor driving signal.
To turn on and off relay(RY2). "H" level: During
Turntable On. "L" level: During Turntable OFF or
during the oven is off condition.
12
RESO
OUT
Terminal not used.
13
Vss
IN
Power source voltage: GND(0V).
The power source voltage to drive LSI is input to Vss terminal.
14
TxD0
OUT
Data signal is output to a memory IC (IC4).
15
P91
OUT
Clock signal is output to a memory IC (IC4).
16
RxD0
OUT
Oven lamp, fan motor and stirrer motor driving signal
To turn on and off shut off relay (RY1). The
square waveform voltage is delivered to the
RY1 driving circuit.
17
P93
OUT
Key strobe signal.
Signal applied to key unit section. A pulse signal is input to PB1-PB5 terminal while one
of G1 line keys on key matrix is touched.
18
P94
OUT
Key strobe signal.
Signal applied to key unit section. A pulse signal is input to PB1-PB5 terminal while one
of G2 line keys on key matrix is touched.
19
P95
OUT
Key strobe signal.
Signal applied to key unit section. A pulse signal is input to PB1-PB5 terminal while one
of G3 line keys on key matrix is touched.
20
P40
OUT
Key strobe signal.
Signal applied to key unit section. A pulse signal is input to PB1-PB5 terminal while one
of G14 line keys on key matrix is touched.
16.7 msec.
T1
T2
H : +5V
L : GND
16.7 msec.
During cooking
H : +5V
L : GND
ON
OFF
H : +5V
L : GND
