16
R-3S56
Pin No. Signal I/O Description
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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