UBI EasyCoder 501 – Service Manual
95
13. MEMORY CARD ADAPTER, cont'd.
13.1
Description, cont'd.
Bus Driver Board; Circuit Diagram
Bus Driver Board 1-971712-25
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
+5.3V
+5.3V
GND
GND
CSMEM
RD
WR
HBE
/RESET
HOLDA
NEXTHOLD
DDIN
NADS
CTTL'
NMI
GND
A23'
A22'
A21'
A20'
A19'
A18'
A17'
A16'
AD15
AD14
AD13
AD12
AD11
AD10
AD9
AD8
AD7
AD6
AD5
AD4
AD3
AD2
AD1
AD0
BUSDIR
GND
AD14
BUS 1
BUS 2
P2
TO MEMORY CARD ADAPTER
P1
FROM CPU BOARD
AD12
AD10
AD8
AD6
AD4
AD2
AD0
74HC245
IC3
/AD12
/AD10
/AD8
/AD6
/AD4
/AD2
/AD0
1
19
2
3
4
5
6
7
8
9
17
/AD14
18
16
15
14
13
12
11
+5.3V
+5.3V
GND
GND
CSMEM
RD
WR
/HBE
GND
GND
GND
GND
/NADS
GND
NMI
GND
/A23'
/A22'
/A21'
/A20'
/A19'
/A18'
/A17'
/A16'
/AD15
/AD14
/AD13
/AD12
/AD11
/AD10
/AD9
/AD8
/AD7
/AD6
/AD5
/AD4
/AD3
/AD2
/AD1
/AD0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
3EN1
3EN2
G3
BUSDIR
GND
AD15
AD13
AD11
AD9
AD7
AD5
AD3
AD1
74HC245
IC4
/AD13
/AD11
/AD9
/AD7
/AD5
/AD3
/AD1
1
19
2
3
4
5
6
7
8
9
17
/AD15
18
16
15
14
13
12
11
3EN1
3EN2
G3
1
2
1
2
GND
RD
C3
D1
CSMEM
12
13
11
BUSDIR
A22'
A21'
A20'
A19'
A18'
A17'
A16'
74HC541
74HC32
IC2
IC1D
/A22'
/A21'
/A20'
/A19'
/A18'
/A17'
/A16'
1
19
3
4
A23'
2
5
6
7
8
9
17
16
/A23'
18
15
14
13
12
11
&
EN
1
GND
HBE
1
2
3
/HBE
74HC32
IC1A
1
GND
NADS
9
10
8
/NADS
74HC32
IC1C
1
GND
4
5
6
74HC32
IC1B
1
+
C1 +
C2
+5V
+
Содержание EasyCoder 501 SA
Страница 214: ...UBI EasyCoder 501 Service Manual 214 NOTES...