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/ Tag:Connection Test

Using CONNECT vs PULL in PDD files

Why use CONNECT not PULL for low-value pull resistors? When a resistor is specified as a pull resistor the XJTAG system will expect two things: […]

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Debugging the Connection Test – part 4 (Logic errors)

With the new Logic support in XJTAG, the connection test can find more errors […]

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Logic in XJTAG – capabilities and limitations

We see a lot of logic components used on boards that come through our office. Most often we see buffers, bus transceivers and devices of that nature, but also plenty of the usual discrete logic chips – simple gates, decoders, encoders etc. […]

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Debugging Connection Test – part 3

Solving common Connection Test problems There are several types of error found by Connection Test which regularly (and unsurprisingly) confuse users. This article tries to help out… […]

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Debugging Connection Test – part 2

Understanding the connection test output When Connection Test finds an error on a board it tries to ascertain what the problem is. This may involve carrying out additional checks, to try to eliminate noise on a floating net or cross-talk as a cause of the behaviour. If the fault appears to be genuine then the Connection Test reports the error. […]

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Debugging Connection Test – part 1

Note: This post was published in 2009 and was therefore accurate in XJTAG version 2.2. An updated version of this post is available here and should be used with XJTAG version 3.x. […]

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