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525B
Users Manual
4-22
Each status register and queue has a summary bit in the Serial Poll Status Byte.
Enable registers are used to mask various bits in the status registers and generate
summary bits in the Serial Poll Status Byte. For IEEE-488 interface operation, the
Service Request Enable Register is used to assert the SRQ control line on detection
of any status condition or conditions the programmer chooses. For RS-232
interface operation, the SRQSTR string is sent over the serial interface when the
SRQ line is set. (See the SRQSTR command description in Chapter 5 for more
information.)
0
1
2
345
6
7
0
1
2
345
6
7
&
&
&
&
&
&
&
&
Logical OR
Event Status
Register
Read using *ESR?
Event Status
Enable Register
Read using *ESE?
Write using *ESE
PON
0
CME
EXE
DDE
QYE
0
OPC
0
00
0
1
2
3457
&
&
&
&
&
&
&
Logical OR
Status Byte Register
Service Request
Enable Register
ESB
MAV
Read using *SRE?
Write using *SRE
Error Queue
Read using FAULT?
Read by Serial Poll
Read using *STB?
Service Request
Generation
SRQ
on
IEEE bus
Output Buffer
EAV
Data
Available?
Error
Available?
MSS
6
RQS
0
fcn19f.eps
Figure 4-5. Status Register Overview
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