Chapter 3: Architecture
27
Calibration Subsystem
The calibration subsystem is used to calibrate
each
analog
output zero offset (with 150-microvolt accuracy) and output
range (PD2-AO only). The calibration data is stored in the
on-board EEPROM. Additionally a PowerDAQ AO board
provides an application for the user to configure the start-
up output value of the any DAC. This value will be loaded
immediately after a system reset or power-on with 200 ms
maximum latency.
DSP Processor
All PowerDAQ AO boards are based on the Motorola 56301
DSP. This is a 24-bit 66/100 MHz processor with an
integrated PCI interface. The PCI interface implements the
PCI Local Bus Specifications so the board is fully auto-
configured (base address, interrupt).
When the PowerDAQ software is loaded, the PowerDAQ AO
firmware is downloaded to the DSP via the PCI bus. This
firmware contains all the code necessary to communicate
with the board subsystems and the host PC driver.
Note The drivers from the PowerDAQ web site always
contain the latest versions of the DSP firmware.
Note Custom programming of the DSP is not available with
the standard PowerDAQ AO product. However, should you
require DSP processing, please contact the factory.
PCI Bus Interface
The PowerDAQ AO 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 interrupt resources.
Содержание PowerDAQ PD2-AO Series
Страница 9: ...1 1 Introduction...
Страница 15: ...7 2 Installation and Configuration...
Страница 26: ...Chapter 2 Installation and Configuration 18...
Страница 27: ...19 3 Architecture...
Страница 38: ...Chapter 3 Architecture 30...
Страница 39: ...31 4 API and Third Party Software Examples...
Страница 43: ...35 5 Interconnections...