Owner's manual

Chapter 3: Architecture

Note The drivers from the PowerDAQ web site always

contains the latest versions of the DSP firmware.

Please check www.Omega Engineeringdaq.com

for

the updates.

Note Custom programming of the DSP is not available

with the standard PowerDAQ DIO product. However,

should you require DSP processing, please consult

the factory.

PCI/PXI Bus Interface

The PowerDAQ DIO boards communicate via the PCI bus. The PCI bus

interface is embedded in the Motorola 56301 DSP. On power up, the

host PC automatically configures the boards’ base address and

interrupts resources.

PowerDAQ PDXI-DIO also incorporates support of PXI-TRIGx and

PXI_STAR lines according to PXI standard. Special software called PXI

Configurator supplied with PowerDAQ PDXI-DIO boards helps to

configure PXI bus. Also, all PXI configuration features are available via

the SDK function calls. Please note, that PXI configuration data is

stored into on-board EEPROM.

Digital Input and Output Subsystem (DIO)

The PowerDAQ digital input/output boards are configured as 64 or 128

(PD2-DIO only) lines. All boards use 16-bit line drivers, (not 8255

devices) which allow you to configure the start-up states in groups of

16-bit ports. Every port may be declared as input or output at start-up

and with user-defined default output value.

The DIO subsystem has different input modes, channel list options,

start and stop triggering and clocking control.

Also, every digital input may be configured to generate an interrupt on

any change of state on any line with edge detection. This is software

configurable.