20
R-310AK
R-330AK
R-330AW
Pin No.
Signal
I/O
Description
89
P41
IN
Terminal not used.
90
P42
OUT
Magnetron high-voltage circuit driving signal.
To turn on and off the cook relay (RY2). The
signals holds “L” level during microwave cook-
ing and “H” level while not cooking. In other
cooking modes (variable cooking) the signal
turns to “H” level and “L” level in repetition
according to the power level.
91
INT
IN
Signal synchronized with commercial power source frequency.
This is basic timing for time processing of LSI.
92
AVCC
IN
Connected to GND.
93
AN0
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.
94
AN1
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.
95
AN2
IN
Connected to GND.
96
AN3
IN
To input signal which communicates the door open/close information to LSI.
Door closed; “H” level signal (0V).
Door opened; “L” level signal (-5V).
97-100
AN4-AN7
IN
Terminal to change cooking constant according to the Model.
By using the A/D converter contained in the LSI, DC voltage in accordance with the Model
in operation is applied to set up its cooking constant.
P-HI
H : GND
L : -5V
H : GND
L : -5V
P-70
ON
ON
OFF
OFF
OFF
24 sec.
8 sec.
16.7 msec
H : GND
L : -5V
Pin No.
Signal
I/O
Description
LSI(IZA738DR) : R-310AK
The I/O signal of the LSI(IZA738DR) is detailed in the following table.
1
SEG 0
OUT
Segment data signal.
Connected to LCD.
12
SEG11
The relation between signals are as follows:
LSI signal (Pin No.)
LCD (Pin No.)
LSI signal (Pin No.)
LCD (Pin No.)
SEG 0 (1) ....................................... 4
SEG 6 (7) .................................... 10
SEG 1 (2) ....................................... 5
SEG 7 (8) .................................... 11
SEG 2 (3) ....................................... 6
SEG 8 (9) .................................... 12
SEG 3 (4) ....................................... 7
SEG 9 (10) .................................. 13
SEG 4 (5) ....................................... 8
SEG 10 (11) ................................ 14
SEG 5 (6) ....................................... 9
SEG 11(12) ................................. 15
13
R60
IN
Signal coming from touch key.
When either G12 line on key matrix is touched, a corresponding signal out of R73, R81-R83
and R90-R91 will be input into R60. When no key is touched, the signal is held at "H" level.
14
R61
IN
Signal similar to R60.
When either G11 line on key matrix is touched, a corresponding signal will be input into R61.
15
R62
IN
Signal similar to R60.
When either G10 line on key matrix is touched, a corresponding signal will be input into R61.
16
R63
IN
Signal similar to R60.
When either G9 line on key matrix is touched, a corresponding signal will be input into R61.
17
AIN0
IN
To input signal which communicates the door open/close information to LSI.
Door close "H" level signal (0V). Door open "L" level (-5V)
18-20
AIN1-AIN3
IN
Terminal to change functions according to the Model.
By using the A/D converter contained in the LSI, DC voltage in accordance with the Model
in operation is applied to set up its function.
