Sharp R-1505F Service Manual page 24

R-1500
R-1501
R-1505
R-1506
Pin No. Signal I/O
15 P53 OUT
16 P52 OUT
17-18 P51-P50 OUT
19 P47 OUT
20 P46 IN
21 P45 IN
22 P44 IN
23 P43 IN
24 INT0 IN
25 P41 OUT
26 P40 IN
27 IN
RESET
28-29 P71-P70 OUT
30 XIN IN
31 XOUT OUT
32 VSS IN
33 P27 OUT
34 P26 OUT
35 P25 OUT
36 P24 OUT
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.
Terminal not used.
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.
Signal coming from touch key.
When either G12 line on key matrix is touched, a corresponding signal out of P20 - P27 will
be input into P46. When no key is touched, the signal is held at "H" level.
Signal similar to P46.
When either G11 line on key matrix is touched, a corresponding signal will be input into P45.
Signal similar to P46.
When either G10 line on key matrix is touched, a corresponding signal will be input into P44.
Signal similar to P46.
When either G9 line on key matrix is touched, a corresponding signal will be input into P43.
Signal synchronized with commercial power source frequency.
This is the basic timing for time processing of LSI.
Terminal not used.
Connected to GND through the pull-down resistor R100.
Auto clear terminal.
Signal is input to reset the LSI to the initial state when power is applied.
Terminal not used.
Internal clock oscillation frequency input setting.
The internal clock frequency is set by inserting the ceramic filter oscillation circuit with respect
to XOUT terminal.
Internal clock oscillation frequency control output.
Output to control oscillation input of XIN.
Power source voltage: -5.0V.
VC voltage of power source circuit input.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P43-P46 terminal while one of
G8 line keys on key matrix is touched.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P43-P46 terminal while one of
G7 line keys on key matrix is touched.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P43-P46 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 P43-P46 terminal while one of
G5 line keys on key matrix is touched.
22
Description
16.7 msec.
During cooking
OFF
P-HI
OFF
P-70
(ON and OFF times for other power level.)
H : GND
L : -5V
H : GND
ON
L : -5V
OFF
H : GND
24 sec.
8 sec.
ON
L : -5V
H : GND
L : -5V
16.7 msec.