Motorola MVME712A/D3 User Manual download pdf (Page 47)

Local RAM (RAM) and Static RAM (SRAM) Tests

MVME167BUG/D3 3-3

Memory Addressing - ADR

This is the memory addressability test, the purpose of which is to verify

addressing of memory in the range specified by the configuration parameters

for the RAM test group. Addressing errors are sought by using a memory

locations address as the data for that location. This test is coded to use only 32-

bit data entities. The test proceeds as follows:

1. A Locations Address is written to its location (n).

2. The next location (n+4) is written with its address complemented.

3. The next location (n+8) is written with the most signiÞcant (MS) 16 bits

and least signiÞcant (LS) 16 bits of its address swapped with each other.

4. Steps 1, 2, and 3 are repeated throughout the speciÞed memory range.

5. The memory is read and veriÞed for the correct data pattern(s) and any

errors are reported.

6. The test is repeated using the same algorithm as above (steps 1 through 5)

except that inverted data is used to insure that every data bit is written and

veriÞed at both "0" and "1".

Command Input:

167-Diag>RAM ADR

or:

167-Diag>SRAM ADR

Response/Messages:

Note that in all responses shown below, the response "RAM " is RAM or SRAM,

depending upon which test set is being performed. After the command has

been issued, the following line is printed:

RAM ADR: Addressability..................... Running --->

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

RAM ADR: Addressability..................... Running ---> PASSED

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

RAM ADR: Addressability..................... Running ---> FAILED

Data Miscompare Error:

Address =________, Expected =________, Actual =________

1 2 ... 42 43 44 45 46 47 48 49 50 51 52 ... 238 239

No comments

Motorola MVME712A/D3 User Manual Page 47