Sharp MMD24B manual Pin No, Signal, Magnetron high-voltage circuit driving signal, AH sensor input

MMD24S

MMD24B

Pin No. Signal I/O Description

47

P05

OUT

Magnetron high-voltage circuit driving signal.

Microwave cooking mode

Other cooking mode

To turn on and off the cook relay(RY2). In 100%

VARI MODE

ON TIME

OFF TIME

ON TIME

OFF TIME

power operation, the signals holds “H” level during

100% power

32 sec.

0 sec.

60sec.

0ec.

90% power

30 sec.

2 sec.

54sec.

6sec.

microwave cooking and “L” level while not cooking.

80% power

26 sec.

6 sec.

48sec.

12sec.

In other cooking modes (90%, 80%, 70%, 60%,

70% power

24 sec.

8 sec.

42sec.

18sec.

50%, 40%, 30%, 20%, 10%, 0%) the signal turns

60% power

22 sec.

10 sec.

36sec.

24sec.

50% power

18 sec.

14 sec.

30sec.

30sec.

to “H” level and “L” level in repetition according to

40% power

16 sec.

16 sec.

24sec.

36sec.

the power level.

30% power

12 sec.

20 sec.

18sec.

42sec.

20% power

8 sec.

24 sec.

12sec.

48sec.

10% power

6 sec.

26 sec.

4sec.

56sec.

0% power0 sec.

32 sec.

0sec.

60sec.

48-52

P04-P00

OUT

Used for initial balancing of the bridge circuit (absolute humidity sensor).

53

P57

OUT

Common relay driving signal. (Square Waveform : 60Hz)

To turn on and off the shut-off relays (RY1). The

6.7 msec.

H: +5V

square waveform voltage is delivered to the relay

L: GND

(RY1) driving circuit.

During cooking

54

P56

IN

Terminal not used.

55

TXD1

IN

Terminal not used.

56

RXD1

IN

Terminal not used.

57

P53

IN

Terminal not used.

58

P52

OUT

Signal to sound buzzer.

0. sec

A: Key touch sound.

A

B: Completion sound.

2.0 sec

C: When the oven stops so that the food can be

B

checked in Automatic cooking mode.

.0 sec

.0 sec

H: +5V

C

L: GND

59

P51

IN

Input signal which communicates the drawer door close information to LSI.

Door opened; “H” level signal(+5V).

Door closed; “L” level signal(0V).

60

INT0

IN

Signal to synchronize LSI with commercial power source frequency.

This is the basic timing for all real time processing of LSI.

H : +5V

L : GND

6.7 msec.

61

AVSS

IN

A/D converter power source voltage.

The power source voltage to drive the A/D converter in the LSI.

62

VREF

IN

Reference voltage input terminal.

A reference voltage applied to the A/D converter in the LSI. Connected to +5V.

63

AN7

IN

AH sensor input.

This input is an analog input terminal from the AH sensor circuit, and connected to the

A/D converter built into the LSI.

64

AN6

IN

Used for initial balancing of the bridge circuit (absolute humidity sensor). This input is

an analog input terminal from the AH sensor circuit, and connected to the A/D converter

built into the LSI.

22