Technical data

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Test Descriptions

RAM - Battery Backed-Up RAM

Command Input

PPCx-Diag>rtc ram

Description

This test performs a data test on each BBRAM location of the MK48Txx

“Timekeeper” RAM. RAM contents are unchanged upon completion of

test, regardless of pass or fail test return status. This test is coded to test

only byte data entities. The test proceeds as follows:

For each of the following patterns: $1, $3, $7, $f, $1f, $3f, $7f;

for each valid byte of the “Timekeeper” RAM:

1. Write and verify the current data test pattern.

2. Write and verify the complement of the current data test pattern.

Response/Messages

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

RTC RAM: MK48Txx Battery Backed Up RAM...... Running --->

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

RTC RAM: MK48Txx Battery Backed Up RAM...... Running ---> PASSED

If the test fails, then the display appears as follows:

RTC RAM: MK48Txx Battery Backed Up RAM...... Running ---> FAILED

RTC/RAM Test Failure Data:

(error message)

Here

(error message)

is the following:

Data Miscompare Error:

Address =________, Expected =________, Actual =________