Status and Event Reporting
4-4
VX4792 User Manual
You use the DESER (Device Event Status Enable Register), the ESER (Event
Status Enable Register), and the SRER (Service Request Enable Register) to
select which events are reported to the Status Registers and the Event Queue.
Each of these Enable Registers acts as a filter to a Status Register (the DESER
also acts as a filter to the Event Queue) and can allow or prevent information
from being recorded in the register or queue.
Each bit in an Enable Register corresponds to a bit in the Status Register it
controls. In order for an event to be reported to its bit in the Status Register, the
corresponding bit in the Enable Register must be set to one. If the bit in the
Enable Register is set to zero, the event is not recorded.
Various commands set the bits in the Enable Registers. The Enable Registers and
the commands used to set them are described below.
Device Event Status Enable Register (DESER). The DESER is shown in Fig-
ure 4–3. This register controls which events are reported to the SESR and the
Event Queue. The bits in the DESER correspond to those in the SESR, as was
described earlier.
Use the command to enable and disable the bits in the DESER. Use the
query to read the DESER.
Figure 4-3: The Device Event Status Enable Register (DESER)
Event Status Enable Register (ESER). The ESER is shown in Figure 4–4. It
controls which events are allowed to be summarized by the Event Status Bit
(ESB) in the SBR.
Use the command to set the bits in the ESER. Use the query to read
the ESER.
Figure 4-4: The Event Status Enable Register (ESER)
Enable Registers
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