16
R-312AW
R-312AK
Pin No. Signal I/O Description
DESCRIPTION OF LSI
LSI(IZA758DR)
The I/O signal of the LSI(IZA758DR) is detailed in the following table.
1-12 SEG0-SEG11 OUT Segment data signal.
Connected to LCD.
The relation between signals are as follows:
LSI signal (Pin No.) LCD (Pin No.) LSI signal (Pin No.) LCD (Pin No.)
SEG 0 (1) ................................ S12 SEG 6 (7)................................. S6
SEG 1 (2) ................................ S11 SEG 7 (8)................................. S5
SEG 2 (3) ................................ S10 SEG 8 (9)................................. S4
SEG 3 (4) .................................. S9 SEG 9 (10)............................... S3
SEG 4 (5) .................................. S8 SEG 10 (11)............................. S2
SEG 5 (6) .................................. S7 SEG 11(12).............................. S1
13 R60 IN Signal coming from touch key.
When either G12 line on key matrix is touched, a corresponding signal out of R73, R81-
R83 and R90-R91 will be input into R60. When no key is touched, the signal is held at
"H" level.
14 R61 IN Signal similar to R60.
When either G11 line on key matrix is touched, a corresponding signal will be input into
R61.
15 R62 IN Signal similar to R60.
When either G10 line on key matrix is touched, a corresponding signal will be input into
R62.
16 R63 IN Signal similar to R60.
When either G9 line on key matrix is touched, a corresponding signal will be input into
R63.
17 AIN0 IN To input signal which communicates the door open/close information to LSI.
Door close "H" level signal (0V). Door open "L" level (-5V)
18-20 AIN1-AIN3 IN Terminal to change functions according to the Model.
By using the A/D converter contained in the LSI, DC voltage in accordance with the Model
in operation is applied to set up its function.
21 VSS IN Power source voltage: -5V
VSS voltage of power source circuit input.
22 R70 OUT Magnetron high-voltage circuit driving signal.
To turn on and off the cook relay (RY2). The
signals holds "L" level during microwave cook-
ing and "H" level while not cooking. In other
cooking modes (variable cooking) the signal
turns to "H" level and "L" level in repetition
according to the power level.
(ON and OFF times for other power level.)
23 PULSE OUT Signal to sound buzzer (2.0 kHz).
A: key touch sound.
B: Completion sound.
24 R72 OUT Oven lamp, fan motor and turntable motor driving signal
To turn on and off shut off relay (RY1). The
square waveform voltage is delivered to the
RY1 driving circuit and RY2 control circuit.
P-HI
H : GND
L : -5V
H : GND
L : -5V
P-70
ON
ON
OFF
OFF OFF
24 sec.
8 sec.
16.7 msec.
During cooking
H : GND
L : -5V
A
B
0.1 sec.
2 sec.
H : GND
L : -5V
H : GND
L : -5V
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