Sharp R-480J Service Manual page 19

LSI
The I/O signal of the LSI is detailed in the following table.
Pin No. Signal I/O
1 COM5 OUT
2 COM4 OUT
3 COM3 OUT
4 COM2 OUT
5 COM1 OUT
6 COM0 OUT
7-10 VL1-VL4 IN
11 VL5 IN
12-14 C3-C1 IN
15 VLIN IN
16 VREG OUT
_
17 NC
18 VSS IN
19-21 P27-P25 OUT
22-26 P24-P22 IN
27 P47 IN
28 P46 OUT
29 P45 OUT
30 P44 OUT
_
31 P43
32 CNTR0 OUT
33 P41 OUT
34 INT0 IN
35 P07 OUT
36 P06 OUT
Common data signal : COM11.
Common data signal : COM12.
Common data signal : COM13.
Common data signal : COM14.
Common data signal : COM15.
Common data signal : COM16.
Power source voltage input terminal.
Standard voltage for LCD.
Power source voltage input terminal.
Standard voltage for LCD. Connected to GND.
Terminal not used.
Terminal not used.
Terminal not used.
Terminal not used.
Power source voltage : -5.0V.
The power source voltage to the LSI is input to VSS terminal. Connected to VC.
Terminal not used.
Used for initial balancing of the bridge circuit (absolute humidity sensor).
To input signal which communicates the door open/close information to LSI.
Door close "H" level signal (0V). Door open "L" level signal (-5V).
Terminal not used.
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.
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.
Terminal not used.
Signal to sound buzzer (2.0 kHz).
A: key touch sound.
B: Completion sound.
Terminal not used.
Signal synchronized with commercial power source frequency.
This is the basic timing for time processing of LSI.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to AIN7, P14, P15, P16 and P17
terminal while one of G1 line keys on key matrix is touched.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to AIN7, P14, P15, P16 and P17
terminal while one of G2 line keys on key matrix is touched.
Description
Connected to LCD signal COM11.
Connected to LCD signal COM12.
Connected to LCD signal COM13.
Connected to LCD signal COM14.
Connected to LCD signal COM15.
Connected to LCD signal COM16.
100
PERCENT
70
PERCENT
(ON and OFF times for other power level.)
A
B
17
20.0 msec.
During cooking
OFF
H : GND
ON
L : -5V
OFF OFF
H : GND
24 sec.
8 sec.
ON
L : -5V
0.1 sec.
H : GND
L : -5V
2.0 sec.
H : GND
L : -5V
20.0 msec.
R-480J
H : GND
L : -5V
H : GND
L : -5V