Intermec EasyCoder 501 Service Manual page 109

Chapter 13 Memory Card Adapter
13.1 Description, cont.
FROM CPU BOARD
P1
D1
1 +5.3V
2 +5.3V
3 GND
4 GND
5 CSMEM
6 RD
7 WR
8 HBE
RD
9 /RESET
CSMEM
10 HOLDA
11 NEXTHOLD
12 DDIN
GND
13 NADS
HBE
14 CTTL'
15 NMI
16 GND
GND
17 A23'
NADS
18 A22'
19 A21'
20 A20'
GND
21 A19'
22 A18'
23 A17'
24 A16'
25 AD15
BUS 1
26 AD14
27 AD13
28 AD12
29 AD11
30 AD10
31 AD9
32 AD8
33 AD7
34 AD6
35 AD5
36 AD4
37 AD3
38 AD2
39 AD1
40 AD0
108
Bus Driver Board; Circuit Diagram
+5V
+ C1 + +
C3 C2
IC1D
12
1
11 BUSDIR
13
74HC32
IC1A
1
GND
1
3 /HBE
2
74HC32
A23'
IC1C
9
A22'
1
8 /NADS
10
A21'
A20'
74HC32
A19'
IC1B
4
A18'
1
6
5
A17'
A16'
74HC32
BUSDIR
GND
AD14
AD12
AD10
AD8
AD6
AD4
AD2
AD0
BUSDIR
GND
AD15
AD13
AD11
AD9
AD7
AD5
AD3
AD1
Bus Driver Board 1-971712-25
IC2
1
&
EN
19
2 18 /A23'
3 17 /A22'
4 16 /A21'
5 15 /A20'
6 14 /A19'
7 13 /A18'
8 12 /A17'
9 11 /A16'
74HC541
IC3
1
3EN1
3EN2
19
G3
18 /AD14
2
1
2
3 17 /AD12
4 16 /AD10
5 15 /AD8
6 14 /AD6
7 13 /AD4
8 12 /AD2
9 11 /AD0
74HC245
IC4
1
3EN1
3EN2
19
G3
18 /AD15
2
1
2
3 17 /AD13
4 16 /AD11
5 15 /AD9
6 14 /AD7
7 13 /AD5
8 12 /AD3
9 11 /AD1
74HC245
Intermec EasyCoder 501 – Service Manual Ed. 7
TO MEMORY CARD ADAPTER
+5.3V 1
+5.3V 2
GND 3
GND 4
CSMEM 5
RD 6
WR 7
/HBE 8
GND 9
GND 10
GND 11
GND 12
/NADS 13
GND 14
NMI 15
GND 16
/A23' 17
/A22' 18
/A21' 19
/A20' 20
/A19' 21
/A18' 22
/A17' 23
/A16' 24
/AD15 25
BUS 2
/AD14 26
/AD13 27
/AD12 28
/AD11 29
/AD10 30
/AD9 31
/AD8 32
/AD7 33
/AD6 34
/AD5 35
/AD4 36
/AD3 37
/AD2 38
/AD1 39
/AD0 40
P2