PCI-1002 Series Card
12-bit, 110 kS/s or 44 kS/s Multi-function Board
User Manual, Ver. 3.0, Jun. 2018, PMH-015-30, Page: 50
6.2.2.8 The General Control Register
A general control register (18h) is used to control the add-on interrupt signal source and the AD
trigger method. The format of this register is:
Bit 4 - Bit2
Bit 1 – Bit 0
Interrupt source selection register
AD trigger method selection register
Interrupt Source Selection Register
There are four interrupts selectable for PCI-1002 series card (refer to
Section 1.2.5 “Interrupt
Channel”
).
[Bit 4, Bit 3, Bit 2]
Descriptions
[0, 0, 0]
No interrupt source, disable all interrupts.
[0, 0, 1]
Interrupt after AD completes conversion.
[0, 1, 0]
Interrupt after 8254 timer 0 falls.
[0, 1, 1]
Interrupt after external trigger falls.
[1, 0, 0]
Interrupt after 8254 timer 1 falls.
Others
No interrupt source, Disable all interrupts.
Note: Bit 2-4 of general control register is set to 0 after hardware reset.
AD Trigger Method Selection Register
Here’s a list of our trigger options (refer to
Section 1.2.4 “AD Trigger Methods”
):
[Bit 1, Bit 0]
Descriptions
[0, 0]
General trigger mode.
8254 timer 0 trigger (internal pacer trigger) or software trigger.
[0, 1]
External clock trigger mode.
[1, 0]
Pre-trigger mode.
[1, 1]
Post-trigger mode.
