Description Of Lsi - Sharp R-319FW Service Manual

R-319FW
LSI
The I/O signal of the LSI 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

DESCRIPTION OF LSI

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.
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
cooking 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 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
Maximum
output
70% of maximum
output
22
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
H : GND
L : -5V