Appendix B. Hp E1328A Register-Based Programming; Using This Appendix; Addressing The Registers - HP E1328A User Manual

HP E1328A Register-Based Programming

Using This Appendix

Addressing the Registers

1 The "16" at the end of the address indicates a hexadecimal base number.
Appendix B
The contents of this appendix are:
•
Addressing the Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 55
•
Register Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 59
•
Register Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 60
•
A Register-Based Algorithm . . . . . . . . . . . . . . . . . . . . . . . . . Page 71
•
Programming Examples. . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 72
To access a specific register for either read or write operations, the address of
the register must be used. Register addresses for the plug-in modules are found
in an address space known as VXI A16. The exact location of A16 within a
VXIbus master's memory map depends on the design of the VXIbus master
you are using; for the HP E1300/1301 Mainframe and HP E1405/E1406
Command Module, the A16 space location starts at 1F0000
The A16 space is further divided so that the modules are addressed only at
locations above 1FC000
16
register addresses (40 ). The address of a module is determined by its logical
16
address (set by the address switch on the module) times 64 (40
of the D/A Converter module, the factory default address setting is 72 or 48
Register addresses for register-based devices are located in the upper 25%
of VXI A16 address space. Every VXI device (up to 256) is allocated a
64-byte block of addresses.
Figure B-1 shows the register address location within A16. Figure B-2 shows
the location of A16 address space in the HP E1405/E1406 Command Module.
HP E1328A Register-Based Programming
within A16. Further, every module is allocated 64
Appendix B
1
.
16
). In the case
16
.
16
55