Walking Zeros Test - Agilent Technologies E5900B User Manual

series logic analysis system, see page 95.
To use the Walking Ones test from the command line interface, enter
mtest w1 <parameters>. To see a list of the required parameters, enter
? mtest w1.
For general instructions on using the command line interface see page 88.

Walking Zeros test

The Walking Zeros test finds data bits stuck in logical "1".
How the Walking Zeros test works
This test cycles "0" through each bit position in memory, and checks results.
Example:
The hex values FE, FD, FB, ... are written to each location in the Memory
Range.
Address 1st 2nd 3rd 4th 5th 6th 7th 8th
00000000 FE
00000001 FD
00000002 FB
00000003 F7
00000004 EF
1st, 2nd, 3rd, etc. are the first, second, third complete pass 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 FFFE FFFD
00000001 FFFD FFFB
00000002 FFFB FFF7
00000003 FFF7 FFEF
00000004 FFEF FFDF
Agilent Technologies Emulation for the PowerPC 400/600/700
Chapter 9: Testing Target System Memory
FD FB F7 EF
FB F7 EF DF
F7 EF DF BF
EF DF BF 7F
DF BF 7F FE
3rd 4th 5th 6th
FFFB FFF7 FFEF FFDF
FFF7 FFEF FFDF FFBF
FFEF FFDF FFBF FF7F
FFDF FFBF FF7F FEFF
FFBF FF7F FEFF FDFF
Memory Test Patterns
DF BF 7F
BF 7F FE
7F FE FD
FE FD FB
FD FB F7
7th 8th 9th ...
FFBF FF7F FEFF ...
FF7F FEFF FDFF ...
FEFF FDFF FBFF ...
FDFF FBFF F7FF ...
FBFF F7FF EFFF ...
16th
7FFF
FFFE
FFFD
FFFB
FFF7
107