Archive for the ‘Connection Test’ tag
Using CONNECT vs PULL in PDD files
27 September, 2010
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: Read the rest of this entry »
By Bob Storey on 27 September, 2010 |
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Debugging the Connection Test – part 4 (Logic errors)
23 August, 2010
With the new Logic support in XJTAG, the connection test can find more errors Read the rest of this entry »
By Bob Storey on 23 August, 2010 |
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Logic in XJTAG – capabilities and limitations
9 August, 2010
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. Read the rest of this entry »
By Bob Storey on 9 August, 2010 |
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Debugging Connection Test – part 3
24 August, 2009
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…
By Bob Storey on 24 August, 2009 |
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Debugging Connection Test – part 2
10 August, 2009
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.
By Bob Storey on 10 August, 2009 |
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Debugging Connection Test (Part 1)
25 June, 2009
This post describes debugging the Connection Test from XJDeveloper.
The XJTAG connection test is an automated interconnect test which checks for shorts, opens, stuck high and stuck low errors on a circuit board. Some circuit boards have cross-talk or similar issues, which do not affect the normal running of the board, but are picked up by the XJTAG connection test.
By Bob Storey on 25 June, 2009 |
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