R2
R1
R0
GAIN
0
0
0
1
0
0
1
2
0
1
0
4
0
1
1
8
1
0
0
16
1
0
1
Invalid
1
1
0
Invalid
1
1
1
Invalid
The analog input range, maximum input voltage and gain has the relation as the following
equation:
Analog input range = maximum input voltage/gain
The maximum input voltage is selected by JP9. It can be +/- 5V or +/- 10V. The default
maximum input voltage is +/- 5V. From this equation, the analog input ranges are +/- 5 V, +/-
2.5V, +/-1.25 V, +/-0.625V, and +/- 0.3125V.
4.7 Mode Control Register
The mode control register is a write-only register using address BASE +11. This register
provides the way to control the operating modes of the PCL-812PG.
Data Format:
A. Under internal trigger condition (JP1 is set to internal)
B: Under external trigger source condition (JP1 is set to external)
*Note: Set up trigger jumper JP1 on EXT as below before using external trigger mode:
4.8 Programmable Interval Timer/Counter Registers
The four registers located at address BASE 0, 1, 2 and 3 are used for Intel 8253 programmable
timer/counter. Please refer to Chapter 8 or the 8253 product literature for detailed application
information.
