20
Function groups
Function groups
Manual ADQ-22/23-Serie Rev. 1.1
3.3.2 Programming
The output ports (DO_x) can be programmed independently of each other. The port direction is
predetermined by the hardware.
3.3.2.1 Single-value issue
In this operating mode, you can output one digital value at a time in the respective port width.
Note:
An output port can also be read back!
Follow the procedure as described in the online help.
3.3.2.2 Streaming operation
The software-controlled streaming mode enables the continuous output of a bit pattern stream
up to 1 kS/s port by port.
Follow the procedure as described in the online help.
3.3.2.3 Interrupt mode
If the output stage is overloaded, the port concerned is automatically switched off and an
interrupt is generated.
Observe the procedure as described in the online help.
3.4 Bidirectional digital inputs/outputs
The ADQ-22 series has a bidirectional 16 bit digital I/O port (DIO_x). The ADQ-23 series has a
bidirectional 8 bit digital I/O port (DIO_x). If required, the port can be tapped via the 25-pin
sub-D socket ST2. Depending on the form factor used, an additional slot bracket for PCI/PCIe
slots (ADQ-AP-D25F-PCI) or a front panel for cPCI slots (ADQ-AP-D25F-cPCI) is included in the
scope of delivery for this purpose (see pin assignment on page <?> and page 30).
After switching on the supply, all ports are switched to input.
3.4.1 Wiring
When wiring the inputs and outputs, make sure that the TTL level is maintained (see specifica-
tions on page 25) and that a reference to PC ground (GND_PC at ST2) must be established. The
max. output current is I
O
= I
OL
= I
OH
= 10 mA.
