Interface 150821/A4 Page 73 of 110
Status Byte Register
The Status Byte Register is composed of 8 bits that summarize the status data. The Status Byte
Register can be read using either *STB? or SPOLL. Both return a decimal expression of the
contents of the register. Status Byte Assignments are listed in table 3-5.
Status Byte Register
Service Request
7 RQS ESB MAV 3 2 1 0
0123457
Service Request
Enable Register
set by *SRE
Status Byte Register
read by *STB?
or SPOLL
Logical OR
Status Summary Messages
Figure 3-2a: Status Byte Register
Table 3-5 Status Byte Assignments
Bit No. Bit Weight Description
7 128 Operation Status Register Summary
6 64 Request Service
5 32 Standard Event Status Register Summary
4 16 Message Available
3 --
2 -- Always 0
1 -- Always 0
0 -- Always 0
To Next Page
Loading...