16
R-4A68
18
R62
OUT
Segment data signal.
Signal similar to R70.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to R81, R82, R83 and R90 terminal
while one of G7 line keys on key matrix is touched.
19
R63
OUT
Segment data signal.
Signal similar to R70.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to R81, R82, R83 and R90 terminal
while one of G8 line keys on key matrix is touched.
20
INT2
IN
Signal synchronized with commercial source frequency(50Hz).
This is basic timing for time processing of LSI.
21
R81
IN
Signal coming from touch key.
When either one of G9 line keys on key matrix is touched, a corresponding signal out of R51,
R52, R53, R60, R61, R62, R63 will be input into R81. When no key is touched, the signal is
held at "L" level.
22
R82
IN
Signal coming from touch key.
When either one of G10 line keys on key matrix is touched, a corresponding signal out of R51,
R52, R53, R60, R61, R62, R63 will be input into R82.
23
R83
IN
Signal coming from touch key.
When either one of G11 line keys on key matrix is touched, a corresponding signal out of R51,
R52, R53, R60, R61, R62, R63 will be input into R83.
24
R90
IN
Signal coming from touch key.
When either one of G12 line keys on key matrix is touched, a corresponding signal out of R51,
R52, R53, R60, R61, R62, R63 will be input into R90.
25
R91
OUT
Oven lamp, turntable motor and cooling fan motor driving signal. (Square Waveform
: 50Hz)
To turn on and off the control relay. The pulse signal (50Hz) is delivered to the control relay
driving circuit and cook relay control circuit.
26
R92
OUT
Magnetron high-voltage circuit driving signal.
To turn on and off the cook relay. In 100% power operation, the signals holds “L” level during
microwave cooking and “H” level while not cooking. In other cooking modes (70%,
50%,30%,10% power operation) the signal turns to “H” level and “L” level in repetition
according to the power level.
27
KEO
IN
Input signal which communicates the door open/close information to LSI.
Door closed; “H” level signal.
Door opened; “L” level signal.
28
VDD
IN
Connected to GND.
Pin No.
Signal
I/O
Description
Summary of Contents for R-4A68
Page 2: ...R 4A68 ...
Page 36: ...34 R 4A68 96SHARP CORP 03U0 07E Printed in Japan ...
