22
R - 2 2 A T
R-23AM
R - 2 4 A T
Pin No.
Signal
I/O
Description
5-6
AN7-AN6
IN
Terminal to switch the specification.
7
AN5
IN
Connected to GND.
8
AN4
IN
A/D input for troubleshooting Magnetron 1.
9
AN3
IN
A/D input for troubleshooting Magnetron 2.
10
AN2
IN
Temperature measurement input: OVEN THERMISTOR (1).
By inputting DC voltage corresponding to the temperature detected by the thermis-
tor, this input is converted into temperature by the A/D converter built into the LSI.
11
AN1
IN
Temperature measurement input: MAGNETRON THERMISTOR AND OVEN
THERMISTOR (2).
By inputting DC voltage corresponding to the temperature detected by the thermis-
tor, this input is converted into temperature by the A/D converter built into the LSI.
12
P60
IN
Input signal which communicates the door open/close information to LSI.
Door closed; "H" level signal (0V).
Door opened; "L" level signal (-5.0V).
13
P55
OUT
Power supply output at thermistor detecting circuit.
(Output -5V in cooking only, but apply high impedance to others to prevent thermistor
from electrolytic corrosion ocurrence.)
14-16
P54-P52
OUT
Terminal not used.
17
P51
IN
Signal coming from switch unit.
When either one of switches SW2 and SW4 on the switch unit is pressed, a
corresponding signal out of P44 and P43 will be input into P51.
18
P50
IN
Signal similar to P51.
When either one of switches SW1, SW3 and SW5 on the switch unit is pressed, a
corresponding signal out of P43, P44 and P45 will be input into P50.
19
P47
OUT
Signal to sound buzzer.
This signal is to control the 2.5kHz
continuous signal.
A: Switch touch sound.
B: Completion sound.
20
P46
OUT
Terminal not used.
21
P45
OUT
Switch strobe signal.
Signal is applied to the switch unit. A pulse signal is input to P50 terminal while switch
SW5 is pressed.
22
P44
OUT
Switch strobe signal.
Signal is applied to the switch unit. A pulse signal is input to P50 or P51 terminal while
switch SW3 or SW4 is pressed.
23
P43
OUT
Switch strobe signal.
Signal is applied to the switch unit. A pulse signal is input to P50 or P51 terminal while
switch SW1 or SW2 is pressed.
24
P42
IN
Signal coming from encoder.
When the encoder is turned, the contacts of encoder make pulse signals. And pulse
signals are input into P42.
25
INT1
IN
Signal coming from encoder.
Signal similar to R42. Pulse signals are input into INT1.
26
INT0
IN
Signal synchronized with commercial power source frequency.
This is basic timing for all time processing of LSI.
27
RESET
IN
Auto clear terminal.
Signal is input to reset the LSI to the initial state when power is supplied. Temporarily
set to "L" level the moment power is supplied, at this time the LSI is reset. Thereafter
set at "H" level.
A
B
0.12 sec
1.2 sec
1.2 sec
GND
-5V
GND
-5V
32 sec.
OFF
ON
