23
R-420CK
R-420CW
24 P25 OUT Magnetron high-voltage circuit driving signal.
To turn on and off the cook relay (RY2). The
signals holds "L" level during microwave cooking
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.
(ON and OFF times for other power level.)
25-26 P26-P27 OUT Terminal not used.
27-29 P30-P32 OUT Terminal not used.
30-34 P33-P37 OUT Used for initial balancing of the bridge circuit (absolute humidity sensor).
35 CVCC IN Connected to GND.
36 VSS IN Power source voltage: -5.0V.
The power source voltage to the LSI is input to VSS terminal. Connected to VC
37-38 V3-V2 Power source voltage input terminal.
Standard voltage for LCD
37-38 V3-V2 Power source voltage input terminal.
Standard voltage for LCD
39-40 V1-V0 Power source voltage input terminal.
Standard voltage for LCD. Connected to GND.
41 VCC IN Power source voltage: GND (0V).
The power source voltage to drive the LSI is input to VCC terminal.
42 COM4 OUT Terminal not used.
43 COM3 OUT Common data signal: COM2.
Connected to LCD signal COM2.
44 COM2 OUT Common data signal: COM1.
Connected to LCD signal COM1.
45 COM1 OUT Common data signal: COM0.
Connected to LCD signal COM0.
46-54 SEG21-SEG0 OUT Segment data signal.
Connected to LCD.
The relation between signals are as follows:
LSI signal (Pin No.) LCD (Pin No.) LSI signal (Pin No.) LCD (Pin No.)
SEG 1 (46) ............................... SEG0 SEG 20 (65) ......................... SEG 18
SEG 2 (47) ............................... SEG1 SEG 21 (66) ......................... SEG 19
SEG 3 (48) ............................... SEG2 SEG 22 (67) ......................... SEG 20
SEG 4 (49) ............................... SEG3 SEG 23 (68) ......................... SEG 21
SEG 5 (50) ............................... SEG4 SEG 24 (69) ......................... SEG 22
SEG 6 (51) ............................... SEG5 SEG 25 (70) ......................... SEG 23
SEG 7 (52) ............................... SEG6 SEG 26 (71) ......................... SEG 24
SEG 8 (53) ............................... SEG7 SEG 27 (72) ......................... SEG 25
SEG 9 (54) ............................... SEG8 SEG 28 (73) ......................... SEG 26
SEG 11 (56)............................... SEG9 SEG 29 (74) ......................... SEG 27
SEG 12 (57)............................. SEG10 SEG 30 (75) ......................... SEG 28
SEG 13 (58)............................. SEG11 SEG 31 (76) ......................... SEG 29
SEG 14 (59)............................. SEG12 SEG 32 (77) ......................... SEG 30
SEG 15 (60)............................. SEG13 SEG 33 (78) ......................... SEG 31
SEG 16 (61)............................. SEG14 SEG 34 (79) ........................ SEG 32
SEG 17 (62)............................. SEG15 SEG 35 (80) ......................... SEG 33
SEG 18 (63)............................. SEG16 SEG 36 (81) ......................... SEG 34
SEG 19 (64)............................. SEG17 SEG 37 (82) ......................... SEG 35
Pin No. Signal I/O Description
P-HI
H : GND
L : -5V
H : GND
L : -5V
P-70
ON
ON
OFF
OFF OFF
24 sec.
8 sec.
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