Sharp R-7280 - Page 19

R-7280
R-1720
PIN NO. 1 27
1 SIGNAL j SO
I
I/O
j OUT
Sinnal to sound buzzer.
A: Key touch sound (0.12 sec.).
6: Completion sound (2.4 sec.).
(RD93LAl U)
PIN NO. j 28
1 SIGNAL / NC
I
I/O
’ NC
Terminal not used.
(RD93KA2u)
PIN NO. / 29
1 SIGNAL 1 VDD
Power source voltage: -72V.
VDD voltage of power source circuit input.
I
l/O
/ IN
(RD93GAl U)
PIN NO. ! 30
Terminal not used.
1 SIGNAL 1 P80
I
I/O
/ OUT
(RD93KA2U)
PIN NO. j 31
1 SIGNAL j P81
I
I/O
I IN
Terminal not used. No connection.
(RD93KA7U)
PIN NO. / 32
Connected to GND.
SIGNAL / GND
I
l/O
’ IN
(RD93KA? U)
PIN NO. 1 33
1 SIGNAL j P82
I
I/O
j OUT
Terminal not used. Connected to GND.
(RD93KA5U)
PIN NO.
1 34
1 SIGNAL / P83
Terminal not used. Connected to GND.
I
I/O
1 OUT
(RD93KA5U)
PIN NO. / 35-38
1 SIGNAL j P90-P93
I
I/O
j OUT
Terminal not used. Connected to GND.
(RD93KASJ)
PIN NO. 1 39 1 SIGNAL j PO0
I
l/O
1 IN
Terminal not used. Connected to GND.
(RD93KA5U)
PIN NO. / 40 1 SIGNAL / PO1
I
I/O
1 IN
Terminal to chancre functions accordinQ to the model.
By using the A/D converter contained in the LSI. DC voltage in accordance with the model in operation is applied
to set up its function.
(Rd93JA2U)
PIN NO.
j 41
1 SIGNAL ( PO2
Terminal not used. Connected to GND.
I
I/O
/ IN
(RD93KA5U)
17