Sharp R-363(IN) Service Manual page 22

DESCRIPTION OF LSI
Pin No. Signal
26 INT2
27 R81
28 INT1
29 R83
30-32 R90-R92
33 XIN
34 XOUT
35 RESET
36 HOLD IN/OUT
37 VLC
38 COM1
39 COM2
40 COM3
41 COM4
42 VDD
I/O
IN Signal synchronized with commercial power source frequency.
This is the basic timing for time processing of LSI.
IN Signal coming from tact switch.
When either of tact switches SW5-SW6 is touched, a corresponding signal out of
R60, R61, R62 and R63 will be input into R81. When no tact switch is touched, the
signal is held at "H" level.
IN Signal coming from encoder.
Signal similar to R73. Pulse signals are input into INT1.
IN Signal coming from tact switch.
When either of tact switches SW1-SW4 is touched, a corresponding signal out of
R60, R61, R62 and R63 will be input into R83. When no tact switch is touched, the
signal is held at "H" level.
OUT Terminal not used.
IN Internal clock oscillation frequency setting input.
The internal clock frequency is set by inserting the capacitor and resistor circuit with
respect to XOUT terminal.
OUT Internal clock oscillation frequency control output.
Output to control oscillation input of XIN.
IN Auto clear terminal.
Signal is input to reset the LSI to the initial state when power is supplied. Temporarily
set "L" level the moment power is supplied, at this time the LSI is reset. Thereafter
set at "H" level.
Connected to VDD.
IN Signal synchronized with commercial power source frequency.
Signal similar to VSS.
OUT Common data signal.
Connected to LCD(C1).
OUT Common data signal.
Connected to LCD(C2).
OUT Common data signal.
Connected to LCD (C3).
OUT Terminal not used.
IN Power source voltage input terminal.
Connected to VC.
Description
R-363 - 21
H : +5V
L : 0V
20.0 msec