Motorola MVME712A/D3 User Manual download pdf (Page 66)

Test Descriptions

3-22 167Bug Debugging Package UserÕs Manual

Prescaler Clock Adjust - ADJ

Verifies that the Prescaler Clock Adjust Register can vary the period of the Tick

Timer input clock. This is accomplished by setting the Clock Adjust Register

to zero and allowing Tick Timer 1 to free-run for a small software delay, this

will establish a reference count. Next a 1 is walked through the Clock Adjust

resulting count should be greater than the last count.

Higher level software will always initialize the prescaler prior to calling the

test, so a check of the register with a result of zero will be treated as a failure.

Command Input:

167-Diag>PCC2 ADJ

Response/Messages:

After the command has been issued, the following line is printed:

PCC2 ADJ: Prescaler Clock Adjust............ Running --->

If all parts of the test are completed correctly, then the test passes.

PCC2 ADJ: Prescaler Clock Adjust............ Running ---> PASSED

If any part of the test fails, then the display appears as follows:

PCC2 ADJ: Prescaler Clock Adjust............ Running ---> FAILED

PCC2/ADJ Test Failure Data:

(error message)

Here, (error message) is one of the following:

Prescaler Clock Adjust Register not initialized

Clock Adjust did not vary tick period correctly

Test count : ________, should be greater than

Previous count: ________

1 2 ... 61 62 63 64 65 66 67 68 69 70 71 ... 238 239

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Motorola MVME712A/D3 User Manual Page 66