17
R-2S56
Pin No. Signal I/O Description
7 -10 R40 - R43 OUT Digit selection signal.
Refer to the touch control panel circuit about the relation between signals and digits.
Normally, one pulse is output in every synchronized signal period, and input to the light
-emitting diode.
11-13 R50 - R52 OUT Segment data signal.
Refer to the touch control panel circuit for the relationship between signals and
indicators. Normally, one pulse is output in every synchronized signal period, and
input to the anode of the light -emitting diode.
14 VSS IN Connected to VC.
15 R53 OUT Segment data signal.
Signal similar to R50.
16 R60 OUT Segment data signal.
Signal similar to R50.
Switch strobe signal.
Signal applied to tact switch section. A pulse signal is input to R81-R83 terminal while
one of dioide D91 line switches on switch matrix is touched.
17 R61 OUT Segment data signal.
Signal similar to R50.
Switch strobe signal.
Signal applied to tact switch section. A pulse signal is input to R81-R83 terminal while
one of dioide D92 line switches on switch matrix is touched.
18 R62 OUT Segment data signal.
Signal similar to R50.
Switch strobe signal.
Signal applied to tact switch section. A pulse signal is input to R81-R83 terminal while
one of dioide D93 line switches on switch matrix is touched.
19 R63 OUT Segment data signal.
Signal similar to R50.
20 INT2 IN Signal synchronized with commercial source frequency(50Hz).
This is basic timing for time processing of LSI.
21 R81 IN Signal coming from touch tact switch.
When either one of resistor R93 line switches on switch matrix is touched, a
corresponding signal will be input into R81.
22 R82 IN Signal coming from touch tact switch.
When either one of resistor R92 line switches on switch matrix is touched, a
corresponding signal will be input into R82.
23 R83 IN Signal coming from touch tact switch.
When either one of resistor R91 line switches on switch matrix is touched, a
corresponding signal will be input into R83.
24 R90 OUT Terminal not used.
25 SO OUT Signal to sound buzzer.
A: key touch sound(0.12 sec.).
B: Completion sound(2.4 sec.).
26 SCK OUT Connected to GND. (Pull up through resistor R2)
27 KEO IN Input signal which communicates the door open/close information to LSI.
Door closed; “H” level signal.
Door opened; “L” level signal.
28 VDD IN Connected to GND.
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