IEEE-488 GPIB Interface
25
Revision History Word (U2):
The format of the revision history word
is shown in Figure 22.
Self Test
(J0)
Function
Initiates a hardware and software test.
Remarks
Results are stored in the U1 status word (see “Status” on page 24).
“J0” must be sent each time before reading the result.
End Or Identify (Kx)
Function
Enables or disables the End or Identify (EOI) signal. Set x to:
y
“Y” to enable.
y
“N” to disable.
Remarks
Disabling EOI can cause some controllers to lock unless another
terminator is used.
When enabled, EOI is only asserted at the end of a multiple byte
string.
VCO
Valid Command
Option
Set when no IDDCO is received.
PS
Self-Test Pass
Set when a self-test has been initiated
by the J0 command and the test result
is acceptable.
FL
Self-Test Fail
Set when the self-test has failed. (This
is the default condition.)
Figure 22
Revision History
Word Format
Header
Writable stores
Software Rev level
Hardware Rev level
IEEE-488 1978 compliance
IEEE-488 Bus address
* YY is replaced with current software revision level.
** ZZ is replaced with current hardware revision level.
*
**
4
–
4
2
0
X
X
X
X
X
X
Y
Y
Z
Z
7
8
0
6
–
TERM
Summary of Contents for THRULINE 4021
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