Sharp R-990KS User Manual

R990K(W)
9 – 3
25 INT1 IN
Signal to synchronize LSI with commercial power source freqency.
This is the basic timing for all real time processing of LSI.
26 P40 IN Connected to GND.
27 RST 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.
28/29 XCIN/XCOUT OUT Terminal not used.
30 XIN IN
Internal clock oscillation frequency setting input.
The internal clock frequency is set by inserting the ceramic filter oscillation circuit with respect to XOUT termi-
nal.
31 XOUT OUT
Internal clock oscillation frequency control output.
Output to control oscillation input of XIN.
32 VSS IN
Power source voltage: -5V.
VC voltage of power source circuit input.
33 P27 IN
Signal coming from touch key.
When any one of G-1 line keys on key matrix is touched, a corresponding signal from P17 - P17 will be input
into P27. When no key is touched, the signal is held at "L" level.
34 P26 IN
Signal similar to P27.
When any one of G-2 line key on key matrix is touched, a corresponding signal will be input into P26.
35 P25 IN
Signal similar to P27.
When any one of G-3 line key on key matrix is touched, a corresponding signal will be input into P25.
36 P24 IN
Signal similar to P27.
When any one of G-4 line key on key matrix is touched, a corresponding signal will be input into P24.
37 P23 OUT
Segment data signals.
The relation between signals and indicators are as follows:
Signal Segment Signal Segment Signal Segment Signal Segment
P23...............P1 P17...............P5 P13...............P9 P07.............P13
P22...............P2 P16...............P6 P12.............P10 P06.............P14
P21...............P3 P15...............P7 P11.............P11 P05.............P15
P20...............P4 P14...............P8 P10.............P12 P04.............P16
38-40 P22-P20 OUT
Segment data signal.
Signal similar to P23.
41 P17 OUT
Segment data signal.
Signal similar to P23.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P24-P27 terminal while one of G-12 line keys on
key matrix is touched.
42 P16 OUT
Segment data signal.
Signal similar to P23.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P24-P27 terminal while one of G-11 line keys on
key matrix is touched.
43 P15 OUT
Segment data signal.
Signal similar to P23.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P24-P27 terminal while one of G-10 line keys on
key matrix is touched.
44 P14 OUT
Segment data signal.
Signal similar to P23.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P24-P27 terminal while one of G-9 line keys on
key matrix is touched.
45 P13 OUT
Segment data signal.
Signal similar to P23.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P24-P27 terminal while one of G-8 line keys on
key matrix is touched.
46 P12 OUT
Segment data signal.
Signal similar to P23.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P24-P27 terminal while one of G-7 line keys on
key matrix is touched.
Pin No. Signal I/O Description
20 msec.
H : GND
L (-5V)

Sharp R-990KS Specifications

General

Brand	Sharp
Model	R-990KS
Category	Microwave Oven
Language	English