9100A-017
3-2
To synchronize response gathering, connect the Vector Output
I/O Module input CLOCK line to the INT CLK output and set
the sync command to “ext”. Another method would be to use
the TL/1
sync
“capture” mode. This method allows you to pro-
gram clocks into the vector file to determine when data is gath-
ered in the input section of the I/O Module.
VECTOR LOADING
3.3.
The vector file to be output is loaded by the
vectorload
command into the designated module(s) and resides in the
module until changed by a
writeword
or
writepin
command
directed to that module, or by another
vectorload
.
VECTOR DRIVING
3.4.
Vector driving has two modes of operation. In the first mode of
operation, vector driving can begin immediately upon receipt of
the proper start, enable, and clock signals. In the second mode of
operation, driving begins after the execution of the TL/1
arm
command and upon the receipt of the proper start, enable, and
clock signals. The second mode permits the simultaneous
starting of vector driving and response gathering. The vector
number (in the current vector file) that the driving begins on can
also be selected.
LOOP CONTROL
3.5.
To drive a certain pattern of vectors more than once within a
single file, use the LOOP and ENDLOOP commands within a
vector file to control the number of times and the bounds of the
pattern to be repeated. The number of loops must be set be-
tween 1 and 65536. At least 2 vectors must appear between the
LOOP and ENDLOOP commands.
HANDSHAKING
3.6.
The vector file WAIT command enhances synchronization of the
Vector Output I/O module to the UUT. This command suspends
vector driving until the programmed edge (+ or -) transition has
occurred on the WAIT input pin (see Figure 3-1). Once the edge
Summary of Contents for 9100A Series
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Page 83: ...A 1 Appendix A New TL 1 Commands ...
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