IEEE-488 Reference
5-55
To set the contents of the Service Request Enable Register.
*SRE <NRf>
<NRf> = 0 Clears enable register
= 4 Set EAV bit (Bit 2)
= 8 Set QSB bit (Bit 3)
= 16 Set MAV bit (Bit 4)
= 32 Set ESB bit (Bit 5)
= 128 Set OSB bit (Bit 7)
Power-up Clears register
*CLS No effect
*RST No effect
:STATus:PRESet No effect
DCL, SDC No effect
The *SRE command is used to set the contents of the Service Request Enable Register. This
command is sent with the decimal equivalent of the binary value that determines the desired
state (0 or 1) of each bit in the register.
This enable register is used along with the Status Byte Register to generate service requests
(SRQ). With a bit in the Service Request Enable Register set, an SRQ will occur when the cor-
responding bit in the Status Byte Register is set by an appropriate event. For details on register
structure, refer to paragraph 5.6.
The Service Request Enable Register is shown in Figure 5-15. Notice that the decimal weight
of each bit is included in the illustration. The sum of the decimal weights of the bits that you
wish to set is the value that is sent with the *SRE command. For example, to set the ESB and
MAV bits of the Service Request Enable Register, send the following command:
*SRE 34
where; ESB (bit B5) = Decimal 32
MAV (bit B4) = Decimal 16
<NRf> = 48
The contents of the Service Request Enable Register can be read using the *SRE? query com-
mand (see next paragraph).
Purpose
Format
Parameters
Defaults
Description
5.10.12 *SRE service request enable
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