R-950A
22
Pin No.
Signal
I/O
Description
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 terminal.
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.
37-40
P23-P20
OUT
Segment data signal.
Signal similar to P46.
41
P17
OUT
Segment data signal.
Signal similar to P46.
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 P46.
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 P46.
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 P46.
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 P46.
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 P46.
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.
47
P11
OUT
Segment data signal.
Signal similar to P46.
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.
48
P10
OUT
Segment data signal.
Signal similar to P46.
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.
49-53
P07-P03
OUT
Segment data signal.
Signal similar to P46.
54-56
P02-P00
OUT
Digit selection signal.
Signal similar to P55.
57-59
P37-P35
OUT
Digit selection signal.
Signal similar to P55.
60-64
P34-P30
OUT
Terminal not used.
