Chroma 16502 - Status Byte Register

Milliohm Meter 16502 User’s Manual
5-22
5.5 Status Byte Register
The Status Byte Register is composed of eight bits that summarize an overlaying status data
structure. The Status Byte Register can be read using *STB? to return a decimal expression
of the register contents (which means the total byte weight of all the byte set to “1”.)
0123RQS7
Status Bytes
Register Read
by *STB?
0123457
Set Service Request
Enable Register by
#SRE
Logical OR
&
&
&
&
&
&
&
Service
Request
ESB MAV
Status Summary Messages
Bit No.
Bit Weight
Description
7
128
Operation Status Register Summary Bit
6 64
Request Service Bit. This bit is set when any enabled bit of the Status
Byte Register has been set, which indicates 16502 has at least one
reason for requesting service.
5
32
Standard Event Status Register Summary Bit.
4 16
Message Available Bit. This bit is set whenever the 16502 has data
available in the output queue, and is reset when the available data is
read.
3-0
Always 0.