Sharp KB-3300JS Service Manual - Page 33

A/D converter power source voltage.

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Pin No. 57 58 59 60 Signal P53 P52 P51 INT0 KB-3300JS KB-3300JK KB-3300JW I/O IN OUT IN IN Description To input signal which communicates the oven door open/close information to LSI. Door open "H" level signal (+5V). Door close "L" level signal (GND). Signal to sound buzzer. A: Key touch sound. B: Completion sound. C: When the oven stops so that the food can be checked in Automatic cooking mode. 0.1 sec A 2.0 sec B 1.0 sec C 1.0 sec H: +5V L: GND Input signal which communicates the drawer door open/ close information to LSI. Door opened; "H" level signal(+5V). Door closed; "L" level signal(0V). Signal to synchronize LSI with commercial power source frequency. This is the basic timing for all real time processing of LSI. H : +5V 16.7 msec. L : GND 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. 31

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31
KB-3300JS
KB-3300JK
KB-3300JW
Pin No.
Signal
I/O
Description
57
P53
IN
To input signal which communicates the oven door open/close information to LSI.
Door open "H" level signal (+5V).
Door close "L" level signal (GND).
58
P52
OUT
Signal to sound buzzer.
A: Key touch sound.
B: Completion sound.
C: When the oven stops so that the food can be
checked in Automatic cooking mode.
59
P51
IN
Input signal which communicates the drawer door open/ 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.
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.
A
B
C
H: +5V
L: GND
0.1 sec
2.0 sec
1.0 sec
1.0 sec
16.7 msec.
H : +5V
L : GND