Omega CL3001, User Manual, Page: 56 / 104

Figure 33 - Status Register Overview
Table 9 lists the status registers and gives the read/write commands
and associated mask registers used to access them.
Table 9 - Status Register Summary
Status Register Read Command Write Command
Serial Poll Status Byte (STB) *STB? —
Service Request Enable Register (SRE) *SRE? *SRE
Event Status Register (ESR) *ESR? —
Event Status Enable Register (ESE) *ESE? *ESE
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 to 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 that the programmer chooses.
For RS-232 interface operation, the SRQSTR string is sent over the
serial interface when the SRQ line is set.
1) Serial Poll Status Byte (STB)
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