4601 I-V Meter Operation Manual
6.4 Status Register Structure
6-9
6.4
Status Register Structure
The 4601 has a hierarchical status register structure that conforms to the IEEE standard 488.2-1987 and can
send various statuses of the 4601 to the controller. This section describes the operation model of the status
structure and the allocation of events.
The status register consists of the event register and the enable register.
•
Event Register
The event register latches and maintains the status for each event. (It may also hold changes.)
Once the register is set, it remains set until it is read out by a query or cleared by *CLS.
Data cannot be written into the event register.
•
Enable Register
The enable register specifies for which bits in the event register a valid status summary should be
generated. The logical AND operation is executed between the enable register and the event regis-
ter, and the OR result is generated as a summary. The summary is written into the status byte reg-
ister.
Data can be written into the enable register.
Event Register
Enable Register
0
1
:
:
:
n-1
n
OR
Summary
&
&
&
&
0
1
:
:
:
n-1
n
