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accessed. The DAPE port has been introduced to increase the bandwidth of the trace
channel toward the debugger. With these devices, the DAP port is used to access the
on-chip debug module and the DAPE port to access the MCDS trace module to
achieve maximum possible trace port bandwidth. In this case, connect the 10-cm
ribbon cable, delivered along the Active Probe, to the Active Probe DAP connector
and to the target DAP connector. Next, connect the 2nd 10-cm ribbon cable,
delivered along the Active Probe, to the Active Probe DAPE connector and to the
target DAPE connector.
When powering on the system, switch the iC5700 on before powering on the target
system; when powering down the system, power off the target before powering off the
iC5700!
Use only original iSYSTEM accessories for powering and connecting with the iC5700.
Consult with iSYSTEM before attempting to use any other accessory.
Operating the Active Probe at 160 MHz DAP clock
When using the Active Probe in conjunction with the DAP clock exceeding 100 MHz,
connection to the target microcontroller is critical. Have in mind that the period is only
6.25 ns at 160 MHz clock, which is maximum DAP frequency. Maximum signal integrity
has to be ensured between the Active Probe and the DAP/DAPE port of the target
microcontroller.
For the DAP operation at frequencies higher than 100 MHz the following must be considered:
Target PCB guidelines:
-
Physical DAP/DAPE connector must be located as close as possible to the
microcontroller
-
DAP signals from the microcontroller to the physical DAP/DAPE connector must
be routed as short as possible
-
No vias should be used if possible or at least keep them at minimum
-
Lines must be impedance matched (all should have the same length)
-
Stubs on these lines are forbidden
Connection guidelines:
-
Solely 10-cm ribbon cables provided by iSYSTEM should be used to connect the
Active Probe to the target
-
No additional connectors, adapters or cables between the target DAP/DAPE
connector and the Active Probe are allowed
Disregarding these guidelines will most likely result in Active Probe not running at high
DAP frequencies!
