R-340A
15
Pin No. Signal I/O Description
13 P55 OUT Terminal not used.
14 P54 OUT Signal to sound buzzer (2.0 kHz).
A: key touch sound.
B: Completion sound.
15 P53 OUT 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 cook-
ing modes (variable cooking) the sig-
nal turns to "H" level and "L" level in
repetition according to the power level.
(ON and OFF times for other power level.)
16-18 P52-P50 OUT Terminal not used.
19 P47 IN Signal coming from touch key.
When either G12 line on key matrix is touched, a corresponding signal out of AN3
and P20 - P26 will be input into P47. When no key is touched, the signal is held at
"H" level.
20 P46 IN Signal similar to P47.
When either G11 line on key matrix is touched, a corresponding signal will be input
into P46.
21 P45 IN Signal similar to P47.
When either G10 line on key matrix is touched, a corresponding signal will be input
into P45.
22 P44 IN Signal similar to P47.
When either G9 line on key matrix is touched, a corresponding signal will be input
into P44.
23 P43 OUT Terminal not used.
24 INT0 IN Signal synchronized with commercial power source frequency.
This is the basic timing for time processing
of LSI.
25 P41 OUT Terminal not used.
26 P40 IN Connected to VC.
27 RESET IN Auto clear terminal.
Signal is input to reset the LSI to the initial state when power is applied. Temporarily
set to "L" level the moment power is applied, at this time the LSI is reset. Thereafter
set at "H" level.
28-29 P71-P70 OUT Terminal not used.
30 XIN OUT Internal clock oscillation frequency input setting.
The internal clock frequency is set by inserting the ceramic filter oscillation circuit
with respect to XIN terminal.
31 XOUT OUT Internal clock oscillation frequency control output.
Output to control oscillation input of XOUT.
32 VSS IN Power source voltage: -5.0V.
VC voltage of power source circuit input.
33 P27 OUT Terminal not used.
34 P26 OUT Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P44 - P47 terminal
while one of G8 line keys on key matrix is touched.
35 P25 OUT Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P44 - P47 terminal
while one of G7 line keys on key matrix is touched.
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