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ULINK2 User's Guide
Introduction Hardware Description 
Setup ULINK2 
Connecting ULINK2 Installing Drivers Configure µVision for Debugging ARM Devices Debug Driver Configuration ULINK USB-JTAG Adapter JTAG Device Chain Debug Cortex-M Debugging Debug Driver Configuration ULINK USB-JTAG/SW Adapter JTAG/SW Device Debug Trace Configuration Trace Port Timestamps PC Sampling Trace Events ITM Stimulus Ports Setup Flash Programming Using ULINK2 Configure Cortex-M Devices for Tracing µVision Windows Real-Time Agent Evaluation Boards AppendixTrace Port
The section Trace Port controls the communication channel used for trace operations.
Serial Wire Output – UART/NRZ is the only Trace Port that ULINK2 supports. Make sure to select SW for Port in the dialog ULINK USB-JTAG/SWD Adapter.
SWO Clock Prescaler defines the communication speed when using Serial Wire debugging mode. Values from 1 to 8192 are allowed.
Autodetect configures the prescaler automatically for the highest possible SWO Clock that ULINK2 supports (any clock value up to 1.25MHz plus 1.875MHz and 3.75MHz).
SWO Clock displays the calculated SWO Clock rate, determined by the Core Clock and the SWO Clock Prescaler value.
Detected errors are displayed below the field SWO Clock.
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