Renesas M32R-FPU Manual de usuario descargar pdf (Pagina 15)

M32R Debugger and Trace 15 General SYStem Settings and Restrictions

SYStem.JtagClock Define JTAG clock

Default frequency: 10 MHz.

Selects the JTAG port frequency (TCK) used by the debugger to communicate with the processor. This

influences e.g. the download speed. It could be required to reduce the JTAG frequency if there are buffers,

additional loads or high capacities on the JTAG lines or if VTREF is very low. A very high frequency will not

work on all systems and will result in an erroneous data transfer. Therefore we recommend to use the default

setting if possible

The debugger can not select all frequencies accurately. It chooses the next possible frequency and displays

the real value in the System Settings window. Besides a decimal number like “100000.’” also short forms

like”10kHz” or “15MHz” can be used. The short forms implies a decimal value, although no “.” is used.

When the debugger is not working correctly (e.g. memory is flickering) decrease the JtagClock.

SYStem.LOCK Lock and tristate the debug port

Default: OFF.

If the system is locked, no access to the debug port will be performed by the debugger. While locked, the

debug connector of the debugger is tristated. The main intention of the lock command is to give debug

access to another tool.

The command has no effect for the simulator.

Format: SYStem.JtagClock [<frequency>]

<frequency> 6kHz…25 MHz

1250000. | 2500000. | 5000000. | 10000000.

Format: SYStem.LOCK [ON | OFF]

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Renesas M32R-FPU Manual de usuario Pagina 15