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Manual Number: 00650-004-5
Page 5-4
ADIO1600 Manual
Base + 7 Read:
Contains the upper eight bits of the A/D converter output in binary form or two's
complement by jumper selection.
7
B
6
B
5
B
4
B
3
B
2
B
1
B
0
B
1
1
D
A
0
1
D
A
9
D
A
8
D
A
7
D
A
6
D
A
5
D
A
4
D
A
AD4-AD11:
The most significant eight bits of the A/D conversion, AD11 is the most-
significant bit.
Note:
It is possible to read all 12-bits of analog data in one operation using inport, inpw, portw[ ],
or similar function in other languages.
Digital I/O
Digital I/O available consists of two ports, four input bits IP0-IP3 and four tri-stateable input/
output bits, OP0-OP3, one set on the 37-pin rear panel D connector and 24-bits on a 40-pin IDC
connector on the board. In addition, two of the input port lines do double duty. IP0 is also the
external A/D start-conversion trigger and IP2 is the gate input for Counter 0 of the Counter/Timer.
These secondary functions may or may not be used, depending on the application.
Rear Panel Connector
The rear panel connector has two 4-bit ports; a 4-bit input port, IP0-IP3, and a 4-bit tri-statable bi-
directional input/output port, OP0-OP3 and 24-bits on the 40-pin on-board connector. In addition,
two of the input port lines do double duty. IP0 is the also the external A/D start conversion trigger
and IP2 is the gate input for Counter 0 of the Counter/Timer. These secondary functions may or
may not be used, depending on the application.
Base + 1 Write:
Write Digital Output and Tri-State Enable Control Byte
7
B
6
B
5
B
4
B
3
B
2
B
1
B
0
B
3
N
E
2
N
E
1
N
E
0
N
E
3
P
O
2
P
O
1
P
O
0
P
O
OP0:
Input/Output bit OP0, if EN0 is low then OP0 is in tristate input mode.
OP1:
Input/Output bit OP1, if EN1 is low then OP1 is in tristate input mode.
OP2:
Input/Output bit OP2, if EN2 is low then OP2 is in tristate input mode.
OP3:
Input/Output bit OP3, if EN3 is low then OP3 is in tristate input mode.
EN0:
Writing high enables OP0, low tristates bit allowing input operations.
EN1:
Writing high enables OP1, low tristates bit allowing input operations.
EN2:
Writing high enables OP2, low tristates bit allowing input operations.
EN3:
Writing high enables OP3, low tristates bit allowing input operations.
Содержание ADIO1600 Series
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