Technical data

RTC - MK48Txx Timekeeping Tests

http://www.motorola.com/computer/literature 3-111

ADR - MK48Txx BBRAM Addressing

Command Input

PPCx-Diag>RTC ADR

Description

This test is designed to assure proper addressability of the MK48Txx

BBRAM. The algorithm used is to fill the BBRAM with data pattern “a”,

a single address line of the MK48Txx is set to one, and pattern “b” is

written to the resultant address. All other locations in the BBRAM are

checked to ensure that they were not affected by this write. The “a” pattern

is then restored to the resultant address. All address lines connected to the

MK48Txx are tested in this manner.

Since this test overwrites all memory locations in the BBRAM, the

BBRAM contents are saved in debugger system memory prior to writing

the BBRAM. The RTC test group features a configuration parameter

which overrides automatic restoration of the BBRAM contents. The

default for this parameter is to restore BBRAM contents upon test

completion.

Response/Messages

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

RTC ADR: MK48Txx RAM Addressing............Running --->

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

RTC ADR: MK48Txx

RAM Addressing.....Running ---> PASSED

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

RTC ADR: MK48Txx RAM Addressing.....Running ---> FAILED

RTC/ADR Test Failure Data:

(error message)

Here

(error message)

is one of the following: