Sharp R-520DK Service Manual page 24

R - 5 2 0 D K
R -520DW
R - 5 3 0 D K
R -530DW
LSI(IXA020DR) : R-520DK/DW
The I/O signal of the LSI(IXA020DR) is detailed in the following table.
Pin No. Signal
1-2 P26-P27 OUT
3-5 P70-P72 OUT
6 IC
7 X2 OUT
8 X1
9 VDD1
10 XT1
11 XT2 OUT
12 RESET
13 INTP0
14 INTP1
15 P02 OUT
16 P03 OUT
17 P04 OUT
18 P05 OUT
19 P110 OUT
20 P111 OUT
21 P112 OUT
22 P113 OUT
I/O
Terminal not used.
Terminal not used.
IN Connected to VC.
Internal clock oscillation output.
Output to control oscillation input to X2.
IN Internal clock oscillation frequency control input setting.
The internal clock frequency is set by inserting the ceramic filter oscillation circuit with
respect to X1.
IN Power source voltage: GND(0V).
The power source voltage to drive LSI is input to VDD1 terminal.
IN Connected to GND.
Terminal not used.
IN Auto clear terminal.
Signal is input to reset the LSI to the initial state when power is applied. Temporarily set
"L" level the moment power is applied, at this time the LSI is reset. Thereafter set at "H"
level.
IN Connected to VC.
IN Signal synchronized with commercial power source frequency.
This is the basic timing for time processing of LSI.
Terminal not used.
Magnetron high-voltage circuit driving signal.
To turn on and off the cook relay (RY2). The
signals holds "L" level during microwave cook-
ing and "H" level while not cooking. In other
cooking modes (variable cooking) the signal
turns to "H" level and "L" level in repetition
according to the power level.
Oven lamp, fan motor and turntable motor driving signal
To turn on and off shut off relay (RY1). The
square waveform voltage is delivered to the
RY1 driving circuit and RY2 control circuit.
Terminal not used.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to ANI7, P100, P101, P102
and P103 terminal while one of G8 line keys on key matrix is touched.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to ANI7, P100, P101, P102
and P103 terminal while one of G7 line keys on key matrix is touched.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to ANI6, ANI7, P100, P101,
P102 and P103 terminal while one of G6 line keys on key matrix is touched.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to ANI7, P100, P101, P102
and P103 terminal while one of G5 line keys on key matrix is touched.
Description
P-HI
P-70
(ON and OFF times for other power level.)
22
H : GND
L : -5V
16.7 msec.
OFF
H : GND
ON
L : -5V
OFF OFF
H : GND
24 sec.
8 sec.
ON
L : -5V
16.7 msec.
H : GND
L : -5V
During cooking