Sharp R-4P58 Service Manual page 22

R-4P58 Ww)
Rapes B y
R-4P5
R-AP5:
23 NTI IN Signal coming from encoder.
When the encoder is turned, the contacts of encoder make pulse signals. And
pulse signals are input into INT1.
: ia
Signal coming from encoder.
eid similar to INT1. Pulse signals are input into P41.
IN/OUT
ignal nchronized LS! with commercial power r
"{e Signal coming from touch key.
24
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26
N
~]
Hz}.
When any one of G11 line keys on key matrix is touched, a corresponding signal
from P23 - P27 will be input into P77. When no key is touched, the signal is held
at "L" level.
Signal similar to P77.
When any one of G7 line keys on key matrix is touched, acorresponding signal wil!
be input into P76.
ignal similar to P77.
When any one of G5 and G9 line keys on key matrix is touched, a corresponding
signal will be input into P75.
Signal similar to P77.
When any one of G2 line keys on key matrix is touched, a corresponding signal will
be input into P74.
P73-P71 | IN/OUT | Terminal not used.
Connected to VC.
Auto clear terminal.
Signal is inputto reset the LSI to the initial state when power is applied. Temporarily
set to"L" level the moment power is applied, atthis time the LSl is reset. Thereafter
set at "H" level.
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ie] OQ
31-33
o>
36
37
ah
XCIN- | IN|
xcouT | out |
Terminal not used.
Terminal not used.
Internal clock illation tr ney in ing.
The internal clock frequency is set by inserting the ceramic filter oscillation circuit
with ae to XIN terminal.
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p oo
;
63
ho tO
= m 2)
39 XOUT Internal illation fr ntrol
Output to ata oscillation input of XOUT.
4 Power source voltage: -5V
VC voltage of poe source circuit input.
p
—_—
K r' nal.
Signal polled . touch-key section. A pulse signal is input to P74 - P77 terminal
while one of G4 and G12 line keys on matrix is touched.
Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to P74 - P77 terminal
while one of G10 line keys on matrix is touched.
K r ignal.
— — ~ - — ~ - Signal applied to touct-key section-A pulse signatis inputto P74~ P77 terminal |
while one of G6 line keys on matrix is touched.
pp
Nh
K r ignal.
Signal applied to touch-key section. A pulse signal is input to P74 - P77 terminal
while one of G3 and G8 line keys on matrix is touched.
K r ignal.
Signal applied to touch-key section. A pulse signal is input to P74 - P77 terminal
=a while one of G1 line keys on matrix is touched.
IN/OUT | Terminal not used.
IN/OUT | Terminal not used. .
20
46-48
49-50
P22-P20
P17-P16
Mt
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