Walking Ones Test; How The Walking Ones Test Works; Instructions For Using The Walking Ones Test - Agilent Technologies E5900B User Manual

Testing Target System Memory
Memory Test Patterns
This test will not halt but it will generate an error message if it is run on ROM
or on locations with data line or location errors.

Walking Ones test

How the Walking Ones test works

The Walking Ones test finds data bits stuck in logical "0". This test cycles "1"
through each bit position in memory, and checks results. It does this by
writing and then reading a pattern sequence of ones and zeros from all
memory locations in the range.
Example:
The hexadecimal values 01, 02, 04, ... are written to each location in the
Memory Range.
Address 1st 2nd 3rd 4th 5th 6th 7th 8th
00000000 01
00000001 02
00000002 04
00000003 08
00000004 10
1st, 2nd, 3rd, etc. are the first, second, third, etc. complete passes
through the memory.
Larger Access Size selections take more time because they require more
patterns to be written to all locations (2-byte Access Size requires writing 16
patterns, and 4-byte Access Size requires writing 32 patterns).
Example:
2-byte Access Size writing 16 patterns:
Address 1st 2nd
00000000 0001 0002
00000001 0002 0004
00000002 0004 0008
00000003 0008 0010
00000004 0010 0020

Instructions for using the Walking Ones test

For help about performing a specific memory test using the Agilent 16700-
98
02 04 08 10
04 08 10 20
08 10 20 40
10 20 40 80
20 40 80 01
3rd 4th 5th 6th
0004 0008 0010 0020
0008 0010 0020 0040
0010 0020 0040 0080
0020 0040 0080 0100
0040 0080 0100 0200
Emulation for the Motorola M•CORE
20 40 80
40 80 01
80 01 02
01 02 04
02 04 08
7th 8th 9th ...
0040 0080 0100 ...
0080 0100 0200 ...
0100 0200 0400 ...
0200 0400 0800 ...
0400 0800 1000 ...
16th
8000
0001
0002
0004
0008