Problems
Seamless integration of stand-alone Boundary San tools (BST) with GenRad platforms has been tried unsuccessfully by many BST suppliers in the past, due to long path between the ICT test fixture
interface and the BST controller in the PC. In order to get around the interface problems, the integration has been done, using separate PC, with specialized Pods directly interfacing with
the test fixture etc. Operational reliability and test repeatability has been a common challenge and dramatic reduction in TCK rate the only answer. Therefore effecting throughput and practicality
of this strategy and many have given-up trying.
Acculogic Solution
Acculogic proven and patented Adaptive Clocking™ technology completely eliminates the effects of the long distance between the BST controller and the ICT test fixture interface therefore
removing the hardware obstacle to seamless integration of Acculogic Boundary Scan tools with all GenRad platforms.
Acculogic BST systems can be fully integrated with GenRad 228x, TestStation 1xx, Pilot Flying Prober, Geneva and Versa functional test systems. Acculogic run time software through use of
DLL provides seamless and transparent integration of the boundary scan test and programming with the system operating software.
Option 1 – Direct Backplane Access
The option 1 provides the total integration of Acculogic Bscan system with the GenRad 228x/TestStation systems. Acculogic ScanMaster™
Boundary Scan controller is installed in any of the available PCI slots of the system controller PC, then the 4 BST signals (TCK, TMS, TDI and TDO) are routed through the external instruments
access points to the Analog In-Circuit Test Module of the GR system to the test fixture receiver. The BST signals are available at the fixture receiver to be wired to targets BST port.
Boundary Scan Performance:
TCK rate = 12 MHz *
Data rate ~ up to 12 Mbits/second
* The TCK is limited by the GR system backplane bandwidth (manufacturer specifies 5MHz).
Option 2 – Direct Fixture access
For applications that require temporary integration, the BST signals can be routed from the ScanMaster™ directly to
the test fixture through a DB25 type connector. The advantage of this approach, is simplicity, better signal path integrity for higher speed operation and requires fewer system resources.
Boundary Scan Performance:
TCK rate = 25MHz
Data rate ~ up to 25 Mbits/second
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