Measurement-computing Micro488/p Uživatelský manuál stáhnout pdf (Strana 39)

Appendix A, Micro488/p Command Summary

09-26-02

A-1

Appendix A Micro488/p Command Summary

Command Code Description Page

/A /A Asserts the attention line; leaves Micro488/p in the controller active

state.

3-6

/L /L Sends the LAG command to the specified device; leaves Micro488/p in

the controller active state.

3-6

/ML /ML Places the Micro488/p in the listen state on RESUME (RS). 3-7

/MT /MT Places the Micro488/p in the talk state on RESUME (RS). 3-7

/T /T;addr Issues the talk command to the specified IEEE device. 3-8

/UL /UL Sends the UNL command to the IEEE bus; instructs all devices on the

IEEE bus to get off the IEEE bus.

3-8

/UT /UT Sends the UNT command to the IEEE bus; instructs all devices on the

IEEE bus to get off the IEEE bus.

3-9

ABORT I/O A Pulses Interface Clear (IFC) bus management line to be pulsed; forces all

IEEE bus device interfaces into a quiescent idle state.

3-9

DEVICE CLEAR C[;addr] Instructs Micro488/p to issue Device Clear (DCL) bus command; if

optional addresses are included, issues the Selected Device Clear (SDC)

command to the specified devices.

3-10

ECHO EC;n Instructs the Micro488/p to enable or disable serial echo. 3-10

ENTER ENTER[;addr] Reads data from the IEEE bus and sends it to serial port; a terminator

character, an EOI, or an ESCAPE command terminates data

input/output.

3-11

ESCAPE <CTRL> A

CHR$(1)

Unlocks the Micro488/p from an inappropriate command; clears the

serial input (pending commands) and instructs Micro488/p to wait for

new commands.

3-12

HARDWARE

HANDSHAKE

H;n Enables or disables hardware (CTS/RTS) handshake. 3-12

IEEE BUS

TERMINATOR

TB;n Selects the IEEE bus terminator for reads from the IEEE bus; selected

terminator signifies the end of an ENTER sequence.

3-13

INIT I Provides a warm start of the interface; clears the serial input (pending

commands) and output (pending data) buffers and re-initializes the

internal IEEE controller hardware.

3-14

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