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)
Summary of Contents for Carousel R-990K
Page 38: ...R990K W 12 6 MEMO ...
