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Selecting the
External Analyzer
Mode
R>xtmo -s
R>xtmo -e
Aligned with
Emulation
Analyzer
By default, on power-up or after trace initialization (tinit), the external
analyzer is aligned with the emulator. In this mode, you have 16 exter-
nal trace signals which are clocked with the same signal(s) as the emula-
tion analyzer. The external trace signals may be used to capture target
system signals synchronized with the emulation clock.
The external analyzer may also operate as an independent state ana-
lyzer, or it may operate as an independent timing analyzer if a host com-
puter interface program is used. In the Terminal Interface, use the
xtmo (external trace mode) command to select the independent state
mode or to re-select the emulation mode. The -s option to xtmo is
used to select the independent state analyzer mode.
To re-select the emulation analyzer extension mode, use the -e option
to the xtmo command.
When xtmo -e is specified (which is the default), the external analyzer
becomes an extension of the emulation analyzer. In other words, they
operate as one analyzer. The only external trace commands allowed in
this mode are xtv, xtlb, and xtmo. You can, however, display the help
text for the other external trace commands. The external labels may be
referenced in emulation trace commands in this mode.
External trace signal data is captured on the trace clock specified in the
tck (trace clock source) command. You should not use the external J
and K signals to clock the emulation trace; however, you may wish to
use these signals to qualify the emulation trace clock (refer to the
"Qualifying Clocks" section of the "Special Analyzer Topics" chapter.)
Using the External Analyzer 4-9
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