Freescale Semiconductor NXP CodeWarrior USB TAP, Руководство пользователя

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Connecting to the Target and your Host Computer
Setting the Debug Port Clock Frequency
13 USB TAP Users Guide
Setting the Debug Port Clock Frequency
The debug port on your target is a synchronous interface clocked by the TCK or DSCK
signal. The base frequency is set by the debugger and can be adjusted with preferences in
the debugger.
NOTE For directions on how to set the debug port clock frequency, please see the
CodeWarrior documentation.
Some slow targets might not be able to operate at the initial default rate. Therefore, you
may have to adjust the debug port clock rate.
NOTE Because of variations in the design of target systems, it is not possible to
guarantee that all systems can be operated at the maximum debug port clock
rates. These variations include circuit impedances, trace lengths, and signal
terminations. You may need to select a lower clock rate to get reliable
operation.
Connecting to your Host Computer
Connect one end of your USB 2.0 Cable to a USB port on your host computer. Connect
the other end of the cable to your CodeWarrior USB TAP emulator.
What To Do Next
You can now install your software. See the IDE Users Guide or your targeting manual
about how to configure the debugger and run a confidence test.
For additional information about using the USB TAP with your target system, refer to
“Using the USB TAP” on page 15 .
U SB_TA P.book Page 13 Thursday, N ovem ber 10, 2005 2:27 PM