Sharp R-21JCA-F service manual Pin No Signal Description Auto clear terminal, Power source voltage

R-21JCA-F

Pin No.		Signal	I/O	Description
9			IN	Auto clear terminal.
	RESET
				Signal is input to reset the LSI to the initial state when power is applied. Temporarily
				set to "L" level the moment power is applied, at this time the LSI is reset. Thereafter
				set at "H" level.
10	CNVSS		IN	Power source voltage.
				The power source voltage to drive the LSI is input to CNVSS terminal.
11		XOUT	OUT	Internal clock oscillation frequency control output.
				Output to control oscillation input of XIN.
12		XIN	IN	Internal clock oscillation frequency input setting.
				The internal clock frequency is set by inserting the ceramic filter oscillation circuit with
				respect to XOUT terminal.
13		VSS	IN	Power source voltage: 0V.
				The power source voltage to drive the LSI is input to VSS terminal. Connected to VC.
14		VDD	IN	Power source voltage: +5V.
				The power source voltage to drive the LSI is input to VDD terminal.
15		N.F	IN	Connected to VSS terminal.
16		INT0	IN	Signal coming from encoder.
				Signal similar to P22. Pulse signals are input into INT0.
17		INT1	IN	Signal to synchronize LSI with commercial power source frequency.
				This is basic timing for all real time processing						H : +5V
				of LSI.
										L: 0V
					16.7 msec
18		AIN0	IN	Input signal which communicates the door open/close information to LSI.
				Door closed; "L" level signal.
				Door opened; "H" level signal.
19-21	AIN1-AIN3		IN	Terminal to change functions according to the model.
				Signal in accordance with the model in operation is applied to set up its function.
22		P00	OUT	Terminal not used.
23		P01	OUT	Magnetron high-voltage circuit driving signal.
				To turn on and off the cook relay (RY2). In 100% power operation, the signals hold
				"H" level during microwave cooking and "L" level while not cooking.
24		P02	OUT	Oven lamp, turntable motor and fan motor driving signal(Square Waveform :
				60Hz).		16.7 msec
										H
				To turn on and off shut-off relay (RY1). The square
				waveform voltage is delivered to the relay (RY1)
				driving circuit and relay(RY2) control circuit.						L
								During cooking
25		P03	OUT	Signal to sound buzzer.			2.0 sec
				Completion sound.					H: +5V
									L: 0V
26		P10	OUT	Terminal not used.
27-29	P11-P13		OUT	Segment data signal.
				Signal is input to the cathodes of the light-emitting diodes (LD5, LD10, LD15 and LD20).
30		D0	OUT	Segment data signal.
				Signal is input to the cathodes of the light-emitting diodes (LD4, LD9, LD14 and LD19).
31		D1	OUT	Segment data signal.
				Signal is input to the cathodes of the light-emitting diodes (LD3, LD8, LD13 and LD18).
32		D2	OUT	Segment data signal.
				Signal is input to the cathodes of the light-emitting diodes (LD2, LD7, LD12 and LD17).

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