Sharp R-403KK-T Service Manual page 22

R403KKT
Pin No. Signal I/O
18 P50 OUT
19 P47 IN
20 P46 OUT Night light circuit (light emitting diode) driving signal.
21 P45 IN
22-23 P44-P43 OUT Terminal not used.
24 INTP0 IN
25 P41 IN
26 P40 IN
27 RESET IN
28 P71 IN
29 P70 IN
30 XIN IN
31 XOUT OUT
32 VSS IN
33 P27 OUT
34 P26 OUT
35 P25 OUT
36 P24 OUT
37 P23 OUT
38 P22 OUT
39 P21 OUT
40 P20 OUT
41 P17 OUT Back light signal (light emitting diode) driving signal.
42-55 P16-P3 OUT 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 cooking 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.
Connected to GND.
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 P45.
When no key is touched, the signal is held at "H" level.
Signal synchronized with commercial power source frequency.
This is the basic timing for time processing of LSI.
Signal similar to P45.
When either G11 line on key matrix is touched, a corresponding signal will be input into P41.
Connected to GND through the pull-down resistor.
Auto clear terminal.
Signal is input to reset the LSI to the initial state when power is applied.
Signal similar to P45.
When either G10 line on key matrix is touched, a corresponding signal will be input into P71.
Signal similar to P45.
When either G9 line on key matrix is touched, a corresponding signal will be input into P70.
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.
The power source voltage to the drive LSI is input to VSS terminal.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P70, P71, P41 and P45 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 P70, P71, P41 and P45 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 P70, P71, P41 and P45 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 P70, P71, P41 and P45 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 P70, P71, P41 and P45 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 P70, P71, P41 and P45 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 P70, P71, P41 and P45 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 P70, P71, P41 and P45 terminal while one of G1
line keys on key matrix is touched.
Description
Maximum
output
70% of maximum
output
9 – 2
OFF
H : GND
ON
L : -5V
OFF OFF
H : GND
24 sec.
8 sec.
ON
L : -5V
H : GND
L : -5V
16.7 msec.