National Instruments VXI-MXI User Manual page 193

Glossary
Configuration
Registers
Configuration
Space
Controller
D
DACK
Daisy-Chain
Data Strobe
Data Transfer Bus
Daughter Card
Deadlock
DIP
DMA
DRQ
DTACK
Dynamic
Configuration
VXI-MXI User Manual
A set of registers through which the system can identify a module device
requirements. In order to support automatic system and memory
configuration, the VXIbus specification requires that all VXIbus devices h
ave a set of such registers, all accessible from the P1 connector on the
VMEbus.
The upper 16 KB of A16 space in which the configuration registers for
VXI and MXIbus devices exist.
An intelligent device (usually involving a CPU) that is capable of
controlling other devices.
DMA Acknowledge
A signal line used to propagate a signal level from board to board on a
priority basis, starting with the first slot and ending with the last slot.
A signal used to inform a slave that valid data exists on the bus or used to
request that a slave place data on the bus.
DTB; one of four buses on the VMEbus backplane. The DTB is used by a
bus master to transfer binary data between itself and a slave device.
A board that plugs directly into the expansion connectors of another board.
The VXI-MXI is available with or without a daughter card option called
the INTX card.
Unresolved situation in which two devices are vying for the use of a
resource.
Dual Inline Package
Direct Memory Access; a method by which data is transferred between
devices and internal memory without intervention of the central processing
unit.
DMA Request
Data Transfer Acknowledge
A method of automatically assigning logical addresses to VXIbus devices
at system startup or other configuration times.
Glossary-4 © National Instruments Corporation