Sharp R-84ST Service Manual page 24

LSI(IZA965DR)
The I/O signal of the LSI(IZA965DR) are detailed in the following table.
Pin No. Signal
25 P41
26 P40
27 P77
28 P76
29 P75
30 P74
31 P73
32 P72
33 P71
34 P70
35 RESET
36 P81
37 P80
DESCRIPTION OF LSI
I/O
OUT Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P44 - P47
terminal while one of G8 line key on matrix is touched.
OUT Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P44 - P47
terminal while one of G7 line key on matrix is touched.
OUT Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P44 - P47
terminal while one of G6 line key on matrix is touched.
OUT Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P44 - P47
terminal while one of G5 line key on matrix is touched.
OUT Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P44 - P47
terminal while one of G4 line key on matrix is touched.
OUT Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P44 - P47
terminal while one of G3 line key on matrix is touched.
OUT Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P44 - P47
terminal while one of G2 line key on matrix is touched.
OUT Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P44 - P47
terminal while one of G1 line key on matrix is touched.
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.
IN Connected to VC.
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.
OUT Magnetron high-voltage circuit driving signal.
To turn on and off the cook
relay (RY2). In 100%
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.
OUT Grill (TOP) heating element driving signal.
To turn on and off the grill heating
element relay (RY3). "L" level
during grill cooking, convection
cooking or dual cooking, "H" level
otherwise. The heater relay turns
on and off within a 48 second time
base in accordance with the
special program in LSI.
R-84ST -
Description
ON/OFF time ratio in Micro
cooking
(a. 32second time base)
MICRO ON
COOK
100% 32 sec.
70% 24 sec.
50% 18 sec. 14 sec.
30% 12 sec. 20 sec.
10% 6 sec. 26 sec.
24
20 msec.
During cooking
ON/OFF time ratio in Micro
cooking
(a. 48second time base)
MICRO ON
OFF
COOK
100% 48 sec.
0 sec.
70% 36 sec. 12 sec.
8 sec.
50% 26 sec. 22 sec.
30% 16 sec. 32 sec.
10% 8 sec. 40 sec.
Power output ON time
100 % 48 sec.
90 % 44 sec.
80 % 40 sec.
70 % 36 sec.
60 % 32 sec.
50 % 26 sec.
40 % 22 sec.
30 % 16 sec.
20 % 12 sec.
10 % 8 sec.
H
L
OFF
0 sec.
OFF time
0 sec.
4 sec.
8 sec.
12 sec.
16 sec.
22 sec.
26 sec.
32 sec.
36 sec.
40 sec.