MYDAX 1M9W-S, Instruction, Operations & Maintenance Manual

Page: 24 / 33

sheet 2 of 6
DWG. B2240-2
Mydax Inc.
Auburn, CA.
Mydax Controller M1001
IOREQN
A7
RDN
WRN
U13
U12
A0
A1
A2
A2
A3
A4
IN 1
IN 0
IN 2
IN 3
IN 7
IN 6
IN 4
IN 5
OUT 8
OUT 4
OUT 0
OUT 12
OUT 16
OUT 20
13
12
D1
D0
D2
D3
D7
D6
D4
D5
+5V
Seiko
L4042
LCD
DISPLAY
MODULE
1 2
4
5
6
14
13
12
11
10
9
8
7
10K 10K 10K 10K 10K 10K
A0
A1
A2
+5V
KEYN
U42
5 ea.
1N914
10K
10K 10K 10K 10K 10K
KEYN
SIP
D7 D6 D0 D5 D1 D0 D2 D3
74HC240
U41
KEY MATRIX
(26 Keys)
11 8 13 6 15 4 17 2
1
19
9 12 7 14 5 16 3 18
D2
D3
D4
D5
D6
U10
82C51A
A0
PCLR
RDN
WRN
BAUD
CLOCK
8251N
4.0MHz
+5V
26 4
12
21
13
10
8
7
6
5
2
1
28
27
9
25
11 20
Rd
CTS
Td
RTS
U4
MAX232
15
14
3
17
19
23
12
9
11
10 7
14
8
13
RS-232
Interface
0.1uf
0.1uf
Jan. 15, 1996
U31
Out 24
Out 28
RTC
SIP
+5V
VLC
3
10K
LCD R/W
LCD RS
LCD EN
37
38
39
40
1
2
3
4
U11
8255
"A"
Section
D7 27
28 D6
D5 29
30 D4
D3 31
32 D2
D1 33
34 D0
5 36
RDN
WRN
8255N
6 7
35 26
ResetN
TxRdy
RxRdy
+5V
+
+
+
+
+
10
10
10
10
10
6
2
16
1
3
4
5
15
J3
11
12
13
14
15
6
5
4
3
2
1
C
B
A
74HC138
to sheet 1
74HC138
A
B
C
1
2
3
4
5
6
15
14
13
12
11
10
9
7
74HC138
A
B
C
1
2
3
4
5
6
15
14
13
12
11
10
9
7