Model:XVME-240
The DIO module (along with all XYCOM I/O modules) features the XYCOM Standard
110 Architecture. This design has been incorporated in order to provide a simpler and
more consistent method of programming for the entire line of XYCOM I/O modules.
The central core of the XYCOM Standard I/O Architecture is the “kernel”. The DIO
uses a non-intelligent kernel which provides the circuitry required to receive and
generate all of the signals for a VMEbus defined l6-bit “slave” module. The nonintelligent kernel has the following features:
Control and Address Buffers
Base Address Decode circuitry
Interrupt DecoderlDriver
Control/Status register
Module Identification Data
Pass and Fail LED indicators
XVME-240 Product manual
These features facilitate the operation of the DIO in the following areas:
• Base Addressing – The DIO can be addressed at anyone of 64 lK
boundaries in the Short I/O Address space.
• I/O Interface Block – The DIO occupies a IK block of the Short I/O Address
space called the module I/O Interface Block. Within this block, in standard
locations, are found: the 110 registers, the module status and control
register, and the module identification data.
• Module Status/Control register – This register provides the user with the
hardware means for developing module self-diagnostic software to verify
the module operational status. In addition, two bits in this register are
used to enable the module interrupt capability and to perform a “soft”
module reset to a default configuration.
• Module Identification Data – This facet provides a unique method of
registering module specific information in an ASCn encoded format. This
information can be studied by the system processor on power-up to verify
the system configuration and operational status.
Additional information on the XYCOM Standard 110 Architecture can be found in
Appendix A of this manual.
1.4 SPECIFICATIONS
The following is a list of operational and environmenta. l specifications for the DIO
module.