Sharp R-950A Service Manual page 29

R-950A
Pin No. Signal
28/29 OUT
XCIN/XCOUT
30 XIN
31 XOUT OUT
32 VSS
33 P27
34 P26
35 P25
36 P24
37-40 P23-P20 OUT
41 P17 OUT
42 P16 OUT
43 P15 OUT
44 P14 OUT
45 P13 OUT
46 P12 OUT
47 P11 OUT
48 P10 OUT
49-53 P07-P03 OUT
54-56 P02-P00 OUT
57-59 P37-P35 OUT
60-64 P34-P30 OUT
I/O
Terminal not used.
IN Internal clock oscillation frequency setting input.
The internal clock frequency is set by inserting the ceramic filter oscillation circuit
with respect to XOUT terminal.
Internal clock oscillation frequency control output.
Output to control oscillation input of XIN.
IN Power source voltage: -5V.
VC voltage of power source circuit input.
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.
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.
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.
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.
Segment data signal.
Segment data signal.
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.
Segment data signal.
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.
Segment data signal.
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.
Segment data signal.
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.
Segment data signal.
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.
Segment data signal.
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.
Segment data signal.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P24-P27 terminal
while one of G-6 line keys on key matrix is touched.
Segment data signal.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P24-P27 terminal
while one of G-5 line keys on key matrix is touched.
Segment data signal.
Digit selection signal.
Digit selection signal.
Terminal not used.
Description
Signal similar to P46.
Signal similar to P46.
Signal similar to P46.
Signal similar to P46.
Signal similar to P46.
Signal similar to P46.
Signal similar to P46.
Signal similar to P46.
Signal similar to P46.
Signal similar to P46.
Signal similar to P55.
Signal similar to P55.
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