Read Sharp R-341AM Service Manual online
R341M - 10
Pin No.
Signal
I/O
Description
20.0 msec
H : +5V
L : 0V
26
INT2
IN
Signal synchronized with commercial power source frequency.
This is the basic timing for time processing of LSI.
27
R81
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 R81. When no key is touched, the
signal is held at "H" level.
When either of tact switches SW1-SW4 is touched, a corresponding signal out
of R60, R61, R62 and R63 will be input into R81. When no key is touched, the
signal is held at "H" level.
28
INT1
OUT
Terminal not used.
29
R83
OUT
Terminal not used.
30-32
R90-R92
OUT
Terminal not used.
33
XIN
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.
The internal clock frequency is set by inserting the capacitor and resistor circuit
with respect to XOUT terminal.
34
XOUT
OUT
Internal clock oscillation frequency control output.
Output to control oscillation input of XIN.
Output to control oscillation input of XIN.
35
RESET
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.
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.
36
HOLD
IN/OUT
Connected to VDD.
37
VLC
IN
Signal synchronized with commercial power source frequency.
Signal similar to VSS.
Signal similar to VSS.
38
COM1
OUT
Common data signal: COM1.
Connected to LCD (Pin No. 1)
Connected to LCD (Pin No. 1)
39
COM2
OUT
Common data signal: COM2.
Connected to LCD (Pin No. 2)
Connected to LCD (Pin No. 2)
40
COM3
OUT
Common data signal: COM1.
Connected to LCD (Pin No. 3)
Connected to LCD (Pin No. 3)
41
COM4
OUT
Terminal not used.
42
VDD
IN
Power source voltage input terminal.
Connected to VC.
Connected to VC.
24
R72
OUT
Oven lamp, fan motor and turntable motor driving signal.
To turn on and off shut off relay (RY1).
The square waveform voltage is deliv-
ered to the RY1 driving circuit.
The square waveform voltage is deliv-
ered to the RY1 driving circuit.
25
R73
IN
Signal coming from tact switch.
When either of tact switches SW5-SW7 is touched, a corresponding signal out
of R60,R61 and R62 will be input into R73. When no key is touched, the signal
is held at "H" level
When either of tact switches SW5-SW7 is touched, a corresponding signal out
of R60,R61 and R62 will be input into R73. When no key is touched, the signal
is held at "H" level
DESCRIPTION OF LSI
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