R343M - 10
Pin No. Signal I/O Description
20.0 msec
H : +5V
L : 0V
26 INT2 IN Signal synchronized with commercial power source frequency.
This is the basic timing for time processing of LSI.
27 R81 IN Signal coming from tact switch.
When either of tact switches SW1-SW4 is touched, a corresponding signal out
of R60, R61, R62 and R63 will be input into R81. When no key is touched, the
signal is held at "H" level.
28 INT1 OUT Terminal not used.
29 R83 OUT Terminal not used.
30-32 R90-R92 OUT Terminal not used.
33 XIN IN Internal clock oscillation frequency setting input.
The internal clock frequency is set by inserting the capacitor and resistor circuit
with respect to XOUT terminal.
34 XOUT OUT Internal clock oscillation frequency control output.
Output to control oscillation input of XIN.
35 RESET IN Auto clear terminal.
Signal is input to reset the LSI to the initial state when power is supplied.
Temporarily set "L" level the moment power is supplied, at this time the LSI is
reset. Thereafter set at "H" level.
36 HOLD IN/OUT Connected to VDD.
37 VLC IN Signal synchronized with commercial power source frequency.
Signal similar to VSS.
38 COM1 OUT Common data signal: COM1.
Connected to LCD (Pin No. 1)
39 COM2 OUT Common data signal: COM2.
Connected to LCD (Pin No. 2)
40 COM3 OUT Common data signal: COM1.
Connected to LCD (Pin No. 3)
41 COM4 OUT Terminal not used.
42 VDD IN Power source voltage input terminal.
Connected to VC.
24 R72 OUT Oven lamp, fan motor and turntable motor driving signal.
To turn on and off shut off relay (RY1).
The square waveform voltage is deliv-
ered to the RY1 driving circuit.
25 R73 IN Signal coming from tact switch.
When either of tact switches SW5-SW7 is touched, a corresponding signal out
of R60,R61 and R62 will be input into R73. When no key is touched, the signal
is held at "H" level
DESCRIPTION OF LSI
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