Software Analysis, Development & Test Tools, and Professional Services
JTAG Boundary-Scan Controllers
Corelis has developed a wide range
of high-performance boundary-scan controllers that are compatible with buses
such as USB 2.0, PCI, PCI Express, PXI/cPCI, Ethernet, VME, and VXI. Most of
Corelis' boundary-scan controllers operate up to 80MHz sustained TCK frequency.
This wide choice of platforms allows greater flexibility to meet specific price
and performance criteria for a given application while maintaining complete
software transportability across all hardware platforms.
Controller Selection Matrix
The table below lists both current and legacy JTAG controllers offered by Corelis. Click on the controller model below to find out more about each of our JTAG Boundary-Scan Controllers. A brief description of each controller follows. For complete information on the controllers, please refer to the detailed datasheets.
Optional Accessory Selection Matrix
The system-wide TCK rate for all TAP ports is programmable under software control. A wide range of TCK frequencies can be achieved by using the on-board Phase-Locked-Loop (PLL) generation circuitry. Depending on the controller, users are given the ability to select the desired TCK rate from a range of values up to 100 MHz at resolution increments of less than 2%.
Adjustable Low Voltage Outputs
The voltage level of the parallel I/O, the local TAP port, and each pod TAP is software programmable and can be set to any voltage between 1.25V and 3.3V in increments of 0.05V. The ports of the ScanTAP-4, ScanTAP-8, and ScanTAP-32 pods can also be slew rate (fast/slow) adjusted.
Scan Input Signal Delay Compensation
Automatic delay compensation is inserted within the signal paths. This feature solves the well-known problems associated with the combination of high TCK rates and remote target locations at extended distances.
Target Voltage Detection System
The controller and its remote pod include analog-to-digital converters, which can measure connected power voltages from the target. Such voltages from two distinct target levels can be measured and compared against user-defined limits. This feature can provide detailed signal voltage checks at any stage of a test plan.
Automatic Detection of UUT Power Shorts
With the target powered down, a
well-regulated drive current with current limit can be momentarily applied to
the target power bus. By measuring this current, the approximate load resistance
can be calculated. This provides for the automatic detection of target power
shorts, prior to applying power to the target unit.
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