PIN NO.
j 27
Connected to VC.
1 SIGNAL j AVSS
I
I/O
/ IN
PIN NO. 1 28
1 SIGNAL 1 RESET
I
I/O
I IN
Auto clear terminal.
Signal is input to reset the LSI to the initial state when power is supplied.
Temporarily set to “H” level the moment power is supplied, at this time the LSI is set.
Thereafter set at “L” level.
PIN NO.
i 29
Connected to GN D.
1 SIGNAL I TEST
I
I/O
/ IN
PIN NO. / 30
SIGNAL / OSCl
I
I/O
1 iN
Internal clock oscillation freauencv innut setting.
The internal clock frequency is set by inserting the ceramic filter oscillation circuit with respect to OSCl terminal.
PIN NO. i 31
1 SIGNAL j OSC2
Internal clock oscillation freauencv control output.
Output to control oscillation input of OSC2.
I
I/O
/ OUT
PIN NO.
i 32
1 SIGNAL I VCC
Power source voltage input terminal.
Connected to GND.
I
I/O
j IN
PIN NO. / 33
-Terminal not used.
f SIGNAL 1 DO
I
I/O
/ OUT
PIN NO. / 34
SIGNAL / Dl
Maqnetron High-voltaqe circuit driving sianal.
To turn on and off the cook relay.
I
I/O
j OUT
In high operation, the signals holds “H” level during microwave cooking and “L” level while not cooking. In other
cooking modes (MED. HIGH, MED., MED. LOW, LOW) the signal turns to “H” level and “L” level in repetition
according to the power level.
(RD933Al U)
PIN NO. j 35
Terminal not used.
1 SIGNAL / D2
I
l/O
/ OUT
PIN NO. / 36 1 SIGNAL / D3
I
l/O
1 OUT
Oven lamp, turntable motor and cooling fan motor driving siqnal. (Square Waveform: 45Hz)
To turn on and off the control relay.
The pulse signal (45Hz) is delivered to the control relay driving circuit and cook relay control circuit.
PIN NO. j 37
/
1 SIGNAL j D4
Segment data signal. Signal similar to Dll .
I
l/O
/ OUT
PIN NO. 1 38-42 1 SIGNAL i D5-D9
I
I/O 1 OUT
Diait selection signal. Signal similar to 010.
(RD938A2U)
11
To Next Page
Loading...
