Measurement Computing CIO-DDA06/16 - Manual (Page 7)

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
FI
R
S
TP
O
R
T
A
FI
R
S
TP
OR
TB
F
IRS
T
POR
T
C
LO
FIRS
T
PO
R
T
C
HI
Gain switch
Gain switch
Gain switch
Gain switch
Gain switch
AD660BN
AD660BN
AD660BN
AD660BN
Figure 1. Functional block diagram