R-775(W)R-785(AL) - 23
29-32 P75-P72 OUT Terminal not used.
33 P71 IN
Signal coming from encoder.
Signal similar to INT1. Pulse signals are input into P24.
34 INT0 IN Signal coming from encoder.
When the encoder is turned, the contacts of encoder make pulse signals. And
pulse signal is input into INT1.
35 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.
36 XCIN IN Connected to VC.
37 XCOUT OUT Terminal not used.
38 XIN IN Internal clock oscillation frequency input setting.
The internal clock frequency is set by inserting the ceramic filter oscillation circuit
with respect to XOUT terminal.
39 XOUT OUT Internal clock oscillation frequency control output.
Output to control oscillation input of XIN.
40 VSS IN Power source voltage: -5V.
VC voltage of power source circuit input.
41 P27 OUT Bottom heating element driving signal.
To turn on and off the bottom relay (RY4).
“L” level during grill (BOTTOM GRILL,
TOP AND BOTTOM) cooking, or dual 2
(MICRO+BOTTOM) cooking. “H” level
otherwise.
42 P26 OUT Terminal not used.
43 P25 OUT Fan motor driving signal.
To turn on and off the fan motor relay RY6. “L”
level during cooking, or for 5 minutes after grill
cooking or dual cooking. “H” level otherwise.
44 P24 OUT Terminal not used.
45 P23 OUT Touch control transformer driving signal.
To turn on and off the shut off relay (RY5). If the oven has not been used for more
than 3 minutes, the relay RY5 will be turned off. The relay RY5 will be turned on
when the oven door is opened and closed.
46 P22 OUT Magnetron high-voltage circuit driving signal.
To turn on and off the cook relay
(RY2). In 100% POWER
operation, the signals hold “L”
level during microwave cooking
and “H” level while not cooking.
In other cooking modes (70%,
50%, 30%, 10%) the signal turns
to “H” level and “L” level in
repetition according to the power
level.
47 P21 OUT Grill (TOP) heating element driving signal.
To turn on and off the relay (RY3). “L” level
during grill (TOP GRILL, TOP AND
BOTTOM) cooking, or dual 1
(MICRO+TOP) cooking. “H” level
otherwise.
Pin No. Signal I/O Description
ON/OFF time ratio in Mi-
cro cooking
(a. 32second time base)
ON/OFF time ratio in Mi-
cro cooking
(a. 54second time base)
MICRO ON OFF
COOK
100% 32 sec. 0 sec.
70% 24 sec. 8 sec.
50% 18 sec. 14 sec.
30% 12 sec. 20 sec.
10% 6 sec. 26 sec.
MICRO ON OFF
COOK
100% 54 sec. 0 sec.
70% 40 sec. 14 sec.
50% 29 sec. 25 sec.
30% 18 sec. 36 sec.
10% 9 sec. 45 sec.
ON
OFF
During
cooking
L
GND
H.
(Grill or dual )
ON
OFF
During cooking, or for 5 minutes
after grill or dual cooking.
L
GND
H.
ON
OFF
During
cooking
L
GND
H.
(Grill or dual )
The I/O signal of the LSI are detailed in the following table.
DESCRIPTION OF LSI
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