Sharp R-3A55 User Manual

LSI(IZA496DR)
DESCRIPTION OF LSI
The I/O signal of the LSl(lZA496DR) is detailed in the following table.
pi” No. ~ ;z;; ~ ;
Description
Anode (seqment) of Fluorescent Displav illumination voltaqe: -30V
I
Vp voltage of power source circuit input.
Siqnal cominq from touch kev.
/
When either one of G12 line keys on key matrix is touched, a corresponding signal will
be input into ROo.
Siqnal cominq from touch kev.
When either one of Gl 1 line keys on key matrix is touched, a corresponding signal will
be input into ROI.
4
1 R02 i IN
Siqnal cominq from touch key.
When either one of GlO line keys on key matrix is touched. a corresponding signal will
be input into Ron.
5
Siqnal cominq from touch key.
When either one of G9 line keys on key matrix is toucned. a corresponding signal out
of R2o-R23, Rl c-R: s wiil be input into ROs. When no ke :’ is touched. the signal is held
at “L” level.
,
I
6
/ TEST ~ IN
/
7
j RESET i IN
/
Connected to VC.
Auto clear terminal.
Signal is input to reset the LSI to the initial state when power is supplied. Temporarily
set to “L” level the moment power is supplied. at this time the LSI is set. Thereafter set
at “H” level.
/
I
/
I
I
8
/ OSCl
/ IN
9
osc2 \ OUT
Internal ciock oscillation frequencv input settinq.
The internal clock frequency is set by inserting the ceramic filter oscillation circuit with
respect to OSCl terminal.
Internal clock oscillation frequencv control output.
Output to control oscillation input of OSC2.
10/l 1
/ GND/Avss/
IN/IN
Connected to VC.
12
j AN0 / OUT
Oven lampturntable motor and coolinq fan motor drivinq siqnal. (Square Wave- j
form : 50Hz)
I
To turn on and off the control relay. The pulse signal (50Hz) is delivered to the control 1
relay driving circuit and cook relay control circuit.
I
13
1 AN1 1 OUT
Terminal not used.
OUT
Maqnetron hiqh-voltaqe circuit drivinq siqnal.
I
To turn on and off the cook relay. In low operation, the signals holds “L” level during
1
microwave cooking and “H” level while not cooking. In other cooking modes (MED 1
HIGH, MED,MED LOW,LOW) the signal turns to “H” level and “L” level in repetition
according to the power level.
1
I
15
1 AN3 ] OUT
Terminal not used.
Input siqnal which communicates the door open/close information to LSI.
I
Door closed; “H” level signal.
I
Door opened; “L” level signal.
I
17
AN5 IN
18-19
AN6-AN7 IN
Terminal to change cooking constant.
Connected to VC.
20/2 1
IAVCCNCCI IN/IN
Connected to GND.
t
A
Siqnal svnchronized with commercial source freqencv(5OHz).
This is basic timing for time processing of LSI.
Terminal not used.
17

Sharp R-3A55 Specifications

General

Brand	Sharp
Model	R-3A55
Category	Microwave Oven
Language	English