DatasheetXJDeveloper is an advanced graphical application that enables you to generate the XJEase description of the circuit you want to test. The simple drag-and-drop interface allows you to set up your JTAG chain and categorise all of the non-JTAG devices in your circuit quickly and easily, while the built-in netlist explorer provides a simple interface for you to view the connectivity between devices.
Advanced Connection Test
A proprietary connection test can be run on the board as part of a script. By making use of its knowledge of the nature and interconnection of the devices in the circuit, XJTAG is able to test a higher percentage of a circuit than many other JTAG solutions. By monitoring the status of the devices in the circuit, XJTAG also provides you with more information about the location and precise nature of any faults that are found.
Testing and programming non-JTAG devices
XJEase can be used to test or program non-JTAG devices including Flash, all types of RAM, FIFO arrays, IIC devices, SPI devices and Ethernet controllers.
Flexible, high-level, test description language
All the advantages and flexibility of a programming language, such as loops, variables and flow control, can now be applied to developing device and circuit tests. By generating test patterns as required, under the control of a high-level XJEase program, you can use XJTAG to easily develop complex tests not possible with many other JTAG solutions.
Device-centric — reusable tests
Building an XJEase test system requires no knowledge of the underlying JTAG technology. All device tests written in XJEase are independent of the specific circuit under test. Tests are written from the device's perspective; they specify the pin levels required to run the test and any pin states expected as a result. XJTAG then uses its knowledge of the circuit to create test patterns that will achieve the required inputs. This means that once tests have been developed for a device they can be reused in any circuit without any additional work.
FREE Test Library
Device test files are available for download, including examples of programming Flash and other devices. Even if you have never used JTAG before, it is possible to create a fully functioning test system with no extra programming.
No need to understand how JTAG works
If you do have to create your own tests XJEase makes this easy by abstracting the description of how a device is to be tested from the detail of creating the JTAG test vectors to implement those tests; this means that the process of developing tests for your non-JTAG devices is quick and easy.
XJTAG will check that the pins on a device to be tested are on nets accessible from JTAG devices and then work out which JTAG device pins must be manipulated to access the correct nets.
Similarly, once you have a test file for a device, it can be reused whenever that device is part of another circuit.
Multiple boards
Testing multiple boards is as easy as testing a single board. There is no complex merging to be done; simply give XJTAG the netlists and tell it how the boards are connected together. Everything else is worked out by the underlying engine at runtime.
Running XJEase
There are different ways of running your XJEase tests, depending on your requirements.
XJDebug is the command-line interface to XJEase during development and prototyping. It includes a classic style debugger, allowing you to:
- Step through code a line at a time.
- Set and remove breakpoints.
- Check and set the values of any variables in the code.
- Record interactions with the hardware for later playback.
For the production/servicing environment, we have XJRunner, a run-only environment for XJEase. It is aimed at board manufacturers and/or in-field testing, with additional logging, serial numbering and user management capabilities. It has both a GUI and a command-line version, to allow you to integrate XJTAG with other test systems.
Netlists
Supported netlists include EDIF 2 0 0, RINF, Protel, PADS-PCB, Cadence Allegro, P-CAD, Genrad, BoardStation (Mentor), Zuken, Protel V2 and many other formats. If you can not produce a netlist in one of these formats, please contact us.