Input Connections
Page
15
Blue Chip Technology Ltd.
01271014.doc
Page 15
Note: 4095 represents full scale. The actual value will depend on the input
range selected i.e.
Uni-polar
4095
=
5.11875V (1.25mV/bit)
0-5V Range (4000 = 5V)
4095
=
10.2375V (2.5mV/bit)
0-10V Range (4000 = 10V)
Bi-polar
4095
=
2.5593V (1.25mV/bit)
+/-2.5V Range (4000 = 2.5V)
4095
=
5.11875V (2.5mV/bit)
+/-5V Range (4000 = 5V)
4095
=
10.2375V (5.0mV/bit)
+/-10V Range (4000 = 10V)
4.2
Analogue Outputs
The 2 analogue output channels appear at the following port addresses:
Base + 3 = Update Outputs Strobe A and B
Base + 4 = Analogue Output A Low Byte Load Register
Base + 5 = Analogue Output A High Byte Load Register
Base + 6 = Analogue Output B Low Byte Load Register
Base + 7 = Analogue Output B High Byte Load Register
To select the appropriate output channel voltage, load the low byte register with
the desired value followed by the high byte, low order nibble value.
The updated strobe must be activated by a write instruction to that port address
of any data value.
