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AY-M09AE
AE-M18AE
Microcomputer (IC1) for OUTDOOR UNIT
The microcomputer is a CMOS, one chip, 8-bit microcomputer.
Microcomputer port allocation is as follows.
Pin Terminal Input
No. Name
Output
1
P20
OUT
2
P21
OUT
3
P22
OUT
4
P23
OUT
5
P24
OUT
6
P25
OUT
7
P26
OUT
8
P27
OUT
9
P30
OUT
10 P31
OUT
11 P32
OUT
12 P33
IN
13 P34
IN
14 P35
OUT
15 BUZ
OUT
16 P37
OUT
17 VSS
–
18 P40
OUT
19 P41
OUT
20 P42
OUT
21 P43
OUT
22 P44
OUT
23 P45
OUT
24 P46
OUT
25 P47
OUT
26 P50
OUT
27 P51
OUT
28 P52
OUT
29 P53
OUT
30 P54
OUT
31 P55
OUT
32 VSS
–
Function
Compressor relay (A1)
Compressor relay (A2)
Outdoor motor fan relay
–
–
Valve coil
–
–
–
–
–
–
Test1 input
–
–
–
Power supply(0V)
–
–
–
–
–
–
–
–
–
–
–
LED(error)
LED(serial A2)
LED(serial A1)
Power supply(0V)
Pin Terminal Input
No. Name
Output
33 P56
OUT
34 P57
OUT
35 P60
IN
36 P61
OUT
37 P62
IN
38 P63
OUT
39 P64
OUT
40 P65
OUT
41 P66
OUT
42 P67
OUT
43 RESET –
44 P00
IN
45 P01
OUT
46 P02
OUT
47 P03
OUT
48 VDD
–
49 X2
–
50 X1
–
51 IC
–
52 XT2
–
53 P04
IN
54 AVSS
–
55 ANI0
IN
56 ANI1
IN
57 ANI2
IN
58 ANI3
IN
59 ANI4
IN
60 ANI5
IN
61 ANI6
IN
62 ANI7
IN
63 AVSS
–
64 AVREF –
12
Function
–
–
Serial signal input(A1)
Serial signal output(A1)
Serial signal input(A2)
Serial signal output(A2)
–
–
–
–
Microcomputer reset input
GND
–
–
–
Power supply(5V)
Internal oscillation
Internal oscillation
GND
–
GND
GND
Pipe temp. thermistor(A1)
Pipe temp. thermistor(A2)
GND
Current(A1)
Current(A2)
Revised resistance(A1)
Revised resistance(A2)
GND
5V
5V
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