In the highest expert level, IP Plus, the maximum speeds can be achieved. We are now talking about the nominal or stress level test. At nominal speed, the test is performed at the speed of the pin function. At even higher speeds and/or extended parameters, we speak of the stress-level test. In this case, the specification is even exceeded. The tests in this level show whether your assembly is already working in the limit range or is close to the failure limit.
A typical test application is a Bit Error Rate Test at highspeed interfaces. IP Plus level programming is performed at highest speeds (> MBytes/s), because the programming data are transferred via the communication interface (e.g. Ethernet) as well.
Here in the Expert level, tests and programming are controlled via the JTAG interface or a debug interface, e.g. via SWD (ARM), DAP (Infineon) and others. The programming data can thereby be transferred past the control interface and via a communication interface
Common and widely used communication interfaces today are e.g. USB, Ethernet, CAN and others.
Applications:
JTAG-based Test
The standardised Boundary Scan method according to IEEE 1149.1 can simply control complex components such as FPGAs, processors, controller and CPLDs. Detailed hardware knowledge is not required.
FPGA-based Test
The ChipVORX technology uses the FPGA logic for the test. With the help of universal FPGA models, you can access standardised functionalities without further adjustments. This allows classic boundary scan tests and programming to be significantly accelerated. Untypical tests such as frequency measurement can also berealised.
µProcessor-based Test
A processor-specific model brings the IC into debug mode. After that, internal functionalities (registers, memory areas, complex controllers) are addressed to perform analogue measurements, at-speed Flash programming or even at-speed RAM tests. Both the JTAG port and other debug interfaces can be used for this purpose.
Processor-based test with universal firmware
JEDOS performs complex functional tests with a graphic interface. Memory cell tests, ultra-fast flash programming or interface tests (Ethernet, USB, ...) can be created in a very short time without any special hardware knowledge.
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