24
R-1850
R-1851
DESCRIPTION OF LSI
LSI(IZA719DR)
The I/O signals of the LSI(IZA719DR) are detailed in the following table.
Pin No.
Signal
I/O
Description
1
VCC
IN
Connected to GND.
2
VEE
IN
Anode (segment) of Fluorescent Display illumination voltage: -31V.
Vp voltage of power source circuit input.
3
AVSS
IN
Power source voltage:-5V.
VC voltage of power source circuit input.
4
VREF
IN
Reference voltage input terminal.
A reference voltage applied to the A/D converter in the LSI. Connected to GND.(0V)
5
AN7
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.
6
AN6
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.
7-9
AN5-AN3
IN
Heating constant compensation terminal.
10
AN2
IN
Input signal which communicates the door open/close information to LSI.
Door closed; "L" level signal(0V).
Door opened; "H" level signal(-5V).
11
AN1
IN
Signal coming from touch key.
When any one of G8 line keys on key matrix is touched, a corresponding signal will from
P00 - P06 will be input into AN1. When no key is touched, the signal is held at "L" level.
12
AN0
IN
Temperature measurement input: OVEN THERMISTOR.
By inputting DC voltage corresponding to the temperature detected by the thermistor,
this input is converted into temoerature by the A/D converter built into the LSI.
13
P55
OUT
Segment data signals.
The relation between signals and indicators are as follows:
Signal
Segment
Signal
Segment
P13 ................... P16
P03 ..................... P8
P12 ................... P15
P02 ..................... P7
P11 ................... P14
P01 ..................... P6
P10 ................... P13
P00 ..................... P5
P07 ................... P12
P37 ..................... P4
P06 ................... P11
P36 ..................... P3
P05 ................... P10
P35 ..................... P2
P04 ..................... P9
P55 ..................... P1
(ß : INTO signal)
Refer to the touch control panel circuit about the relation between signals and
indicators. Normally, one pulse is output in every synchronized signal (ß) period, and
input to the anode of the fluorescent display.
14
P54
OUT
Oven lamp driving signal. (Square Waveform : 60Hz)
To turn on and off the shut-off relay(RY1). The square
waveform voltage is delivered to the relay(RY1) driv-
ing circuit.
15
P53
OUT
Turntable motor driving signal.
To turn on and off relay(RY4). "L" level: During
Turntable ON. "H" level: During Turntable OFF or
during the oven is off condition.
16
P52
OUT
Cooling fan motor driving signal.
To turn on and off shut-off relay(RY5). "L" level during
both microwave and convection cooking; "H" level
otherwise.
17
P51
OUT
Damper motor driving signal.
To turn on and off shut-off relay(RY6).
ß(60Hz)
GND
VP
During cooking
L
H
16.7 msec.
ON
OFF
During
cooking
L
GND
H.
ON
OFF
H : GND
L
ON
OFF
H : GND
L
