21
R-7A55(W)/(B)
R-7E45(W)/(B)
DESCRIPTION OF LSI
LSI(IZA516DR)
The I/O signal of the LSI(IZA516DR) is detailed in the following table.
Pin No.
Signal
I/O
Description
1
R60
OUT
Convection motor driving signal.
To turn on and off shut-off relay (RY4). "L" level
during CONVECTION; "H" level otherwise.
2
R61
OUT
Oven lamp and turntable motor driving signal. (Square Waveform : 50Hz)
To turn on and off shut-off relay (RY1). The
square waveform voltage is delivered to the
relay (RY1) driving circuit and relays (RY2,
RY3, RY4, RY5) control circuit.
3
R62
OUT
Terminal not used.
4
R63
OUT
Magnetron High-voltage circuit driving signal.
To turn on and off the cook relay (RY2). In P-HI
operation, the signals holds “L” level during
microwave cooking and “H” 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.
5
R70
OUT
Terminal not used.
6
R71
OUT
Heating element driving signal.
To turn on and off heater relay (RY3). "L" level during convection cooking or dual
cooking; "H" level otherwise. During convection
cooking or dual cooking; the signal becomes "H"
level when the temperature of the oven cavity exceeds
the predetermined temperature.
7/8
R72/R00
OUT
Terminal not used.
9
R01
OUT
Grill heating element driving signal.
To turn on and off the grill heating element relay
(RY5). "L" level during grill or dual cooking; "H"
level otherwise.
10
R02
OUT
Timing signal output terminal for temperature measurement(OVEN).
“H” level (GND) : Temperature measuring timing. (Convection cooking or dual
cooking) / “L” level (-5V) : Thermistor OPEN timing.
11
R03
IN
Input signal which communicates the damper open/close information to LSI.
Damper opened; “H” level; signal (0V:GND).
Damper closed; “L” level; signal (-5V:VC).
12
TEST
IN
Connected to VC.
13
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.
14
OSC1
IN
Internal clock oscillation frequency input setting.
The internal clock frequency is set by inserting the ceramic filter oscillation circuit
with respect to OSC1 terminal.
15
OSC2
OUT
Internal clock oscillation frequency control output.
Output to control oscillation input of OSC2.
16
GND
IN
Connected to VC.
17/18
X1/X2
IN/OUT Terminal not used.
19
AVSS
IN
Connected to VC.
ON
OFF
During
cooking
L
GND
H.
(Convection)
20 msec
During cooking
H
L
HIGH
MED HIGH
MED
MED LOW
LOW
ON
ON
ON
ON
ON
OFF
OFF
OFF
OFF
24 sec
8 sec
18 sec
14 sec
12 sec
20 sec
8 sec
24 sec
32 sec
L
H : GND
ON
OFF
During
cooking
L
GND
H.
(Convection or dual)
ON
OFF
During
cooking
L
GND
H.
(Grill or dual)
