VXI VT1433B - Manual (Page 176)

The VT1433B VXI Registers
The VT1433B 8-Channel 196 kSamples/s Digitizer plus DSP is a register-based
VXI device. Unlike message-based devices which use higher-level programming
using ASCII characters, register-based devices are programmed at a very low
level using binary information. The greatest advantage of this is speed.
Register-based devices communicate at the level of direct hardware manipulation
and this can lead to much greater system throughput.
Users do not need to access the registers in order to use the VT1433B. The
VT1433B’s functions can be more easily accessed using the VT1432A Host
Interface Library software (which is used for both the VT1433B and the
VT1432A 16 Channel 51.2 kSamples/s Digitizer plus DSP). However this chapter
describing the registers is provided as supplemental information.
The A16 Registers
The following A16 registers are accessible at the base address defined by the
device’s logical address. The register at offsets 00
16
to E
16
are not accessible
using longword (D32) accesses. The registers at offsets 10
16
to 3E
16
may be
accessed by any of the D08(EO), D16 or D32 modes. All of these registers are
also accessible at the device A24 base address.
VT1433B User's Guide
Register Definitions
A-2