Sharp R-320CD Service Manual page 27

Pin No. Signal I/O
7 P13 OUT
8 P14 OUT
9 P15 OUT
10 P16 OUT
11 P17 OUT
12 X1 IN
13 X2 OUT
14 VSS IN
15 OSC2 OUT
16 OSC1 IN
17 TEST IN
18 RES IN
19 P20 OUT
20 P21 OUT
21 P22 IN/OUT Data input/output terminal to Memory IC4.
22 P23 OUT
23 P24 OUT
24 P25 OUT
25-26 P26-P27 OUT
P42 terminal while one of G6 line keys on key matrix is touched.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to AN9, AN10, AN11, P41 and
P42 terminal while one of G5 line keys on key matrix is touched.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to AN9, AN10, AN11, P41 and
P42 terminal while one of G4 line keys on key matrix is touched.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to AN9, AN10, AN11, P41 and
P42 terminal while one of G3 line keys on key matrix is touched.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to AN9, AN10, AN11, P41 and
P42 terminal while one of G2 line keys on key matrix is touched.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to AN8, AN9, AN10, AN11, P41
and P42 terminal while one of G1 line keys on key matrix is touched.
Connected to GND.
Terminal not used.
Power source voltage: -5.0V.
VC voltage of power source circuit input.
Internal clock oscillation frequency control output.
Output to control oscillation input of OSC2.
Internal clock oscillation frequency input setting.
The internal clock frequency is set by inserting the ceramic filter oscillation circuit with
respect to OSC1 terminal.
Connected to VC.
Auto clear terminal.
Signal is input to reset the LSI to the initial state when power is applied. Temporarily set "L"
level the moment power is applied, at this time the LSI is reset. Thereafter set at "H" level.
Signal to sound buzzer (2.0 kHz).
A: key touch sound.
B: Completion sound.
Terminal not used.
Clock output terminal to Memory IC4.
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.
Description
A
B
P-HI
P-70
(ON and OFF times for other power level.)
25
0.1 sec.
H : GND
L : -5V
2.0 sec.
H : GND
L : -5V
16.7 msec.
During cooking
OFF
H : GND
ON
L : -5V
OFF OFF
H : GND
24 sec.
8 sec.
ON
L : -5V
R-320CD/CK/CW
R-330CK/CW
H : GND
L : -5V