Sharp R-4H55 Service Manual page 25

Pin No.
38
Signal I/O
B3
OUT
39 B4
OUT
40 B5
OUT
41 B6
OUT
42 87 OUT
43
GO OUT
44 Gl OUT
45-49 G2-G6 OUT
50 G7 OUT
51
52
53
vcc
IN
TEST
0 OUT
IN
-____
OUT
54
0 IN IN
Description
Seament data sianal.
Signal similar to 82.
Kev strobe sianal.
Signal applied to touch-key section. A pulse signal is input to HO - H3 terminal while
one of G-2 line keys on key matrix is touched.
Seament data sianal.
Signal similar to 82.
Seament data sianal.
Signal similar to B2.
Kev strobe sianal.
Signal applied to touch-key section. A pulse signal is input to HO - H3 terminal while
one of G-4 line keys on key matrix is tsuched.
Seam&t data sianal.
Signal similar to 82.
Kev strobe sianal.
Signal applied to touch-key section. A pulse signal is input to HO - H3 terminal while
one of G-5 line keys on key matrix is touched.
Seament data sianal.
Signal similar to B2.
Kev strobe sianal.
Signal applied to touch-key section. A pulse signal is input to HO - H3 terminal while
one of G-6 line keys on key matrix is touched.
Seament data sianal.
Signal similar to 82.
Kev strobe sianal.
Signal applied to touch-key section. A pulse signal is input to HO - H3 terminal while
one of G-7 line keys on key matrix is touched.
Seament data sianal.
Signal similar to 82.
Kev strobe sianal.
Signal applied to touch-key section. A pulse signal is input to HO - H3 terminal while
one of G-8 line keys on key matrix is touched.
Seament data sianal.
Signal similar to B2.
Sianal to sound buzzer.
A . Key touch sound.
B : Completion sound.
Connected to GND.
Connected to VC (-5.2V).
-___
--
-.
lnternel clock OSCillatiOn freaUenCV Control OUtDut.
Output to control oscillation input of 0 IN.
Internal clock oscillation freauencv settina inout.
The internal clock frequency is set by inserting the ceramic filter oscillation circuit
with respect to 0 OUT terminal..
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