
CIO-DDA06/16 User's Guide Introducing the CIO-DDA06/16
CIO-DDA06/16 block diagram
CIO-DDA06/16 functions are illustrated in the block diagram shown here.
8255
Digital I/O
9 8 7 6 5 4
ADDRESS
FIRSTPORTA Bit 0
Bit 1
Bit 2
Bit 3
Bit 4
Bit 5
Bit 6
Bit 7
FIRSTPORTB Bit 0
Bit 1
Bit 2
Bit 3
Bit 4
Bit 5
Bit 6
Bit 7
FIRSTPORTC Bit 0
Bit 1
Bit 2
Bit 3
FIRSTPORTC Bit 4
Bit 5
Bit 6
Bit 7
DGND
P/O
37-pin D conn.
37
36
35
34
33
32
31
30
10
9
8
7
6
5
4
3
29
28
27
26
25
24
23
22
11
Note:
Digital I/O
pin assignments are
the same as for
the PCI-DIO24
ISA Bus
Address Decode
Bus Interface
Buffers and Transceivers
OP27
AD7237
AD660BN
Gain switch
P/O
37-pin D conn.
OP27
OP27
OP27
OP27
OP27
Data
Path
and
Control
FIRSTPORTAFIRSTPORTB
FIRST
PORTC
LO
FIRST
PORTC
HI
Gain switch
Gain switch
Gain switch
Gain switch
Gain switch
AD660BN
AD660BN
AD660BN
AD660BN
Figure 1. Functional block diagram
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