ICE-H8
Features
TRACE32 - Technical Information
5
Dual-port Access
All TRACE32 memories are dual-
ported. The dual-port access makes it
possible to display and modify the con-
tents of the overlay memory, to set or
delete breakpoints or use the flag
memory while the application is run-
ning in real-time.
The H8 has four dual-port modes:
t Nodelay
t Wait
t ClkSteal
t Idle
In Nodelay mode, the dual-port access
is inserted in the regular bus cycles,
generated by the CPU. This means
that the CPU runs in real time during
the dual-port access.
In Wait mode, wait states are inserted
for the dual-port access via the wait
pin. This is only possible, if the corre-
sponding pins is configured as the wait
pin.
In ClkSteal mode, the CPU clock is
stopped for some cycles during the
dual-port access. This works only if the
emulator uses the internal VCO clock.
In Idle mode, the emulator waits on idle
cycles of the CPU to perform the dual-
port access. This cycles are generated
for example during subroutine jumps.
In the
Denied Mode the dual-port
access is switched off.
Dual port access modes