Specifications

1260-14 User Manual
Module Specific Syntax 3-2 EADS North America Defense
Test and Services, Inc. © 1992
Synchronous
Mode
The synchronous mode of operation allows data to be read from or
written to a port in response to a clock edge. Typically, this is
done by:
1. Defining the test parameters and data via the various SETUP
commands.
2. Arming the test via the SETUP <address>.ARM ON command.
3. Applying a series of TTL clock inputs to the CLKIN line until the
last operation on all ports has been completed, causing the test
to automatically disarm. It is also possible to manually disarm
the test before it has completed all of the test vectors. This is
done via the SETUP <address>.ARM OFF command.
4. Reading back the results using the PDATAOUT command.
The following restrictions apply to all synchronous operations:
Synchronous ports are always grouped together and are always
the lowest numbered ports; i.e., the first synchronous port is
always port 0, and the second is always port 1, etc.
All ports not specified as synchronous are asynchronous by
default.
A port may read or write during synchronous operations, but not
both.
Once a synchronous test has been set up, it must be armed before
the unit will enable the handshake lines.
Synchronous operations may not be set up once the 1260-14 is
armed.
There is a maximum of 256 synchronous operations (referred to as
vectors) per port.
All synchronous ports are clocked simultaneously; i.e., if 5
synchronous ports are defined, the first active edge of the clock
will cause the appropriate action to occur on all five ports.
Synchronous ports will support the asynchronous WRITE
command, but will not support the asynchronous READ command.
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com