INDART-ONE/FSL SofTec Microsystems SRL, INDART-ONE/FSL Datasheet - Page 92

• Manufacturer Part Number: INDART-ONE/FSL
• Description: PROG/DEBUG FOR HC08/HCS08/HCS12
• Manufacturer: SofTec Microsystems SRL
• Series: inDARTr
• Type: In-Circuit, Real-Time Debugger/Programmerr

Specifications of INDART-ONE/FSL

• Contents: In-circuit debugger/programmer unit, Cables, Evaluation Board and Software
• For Use With/related Products: Freescale HC08/S08/RS08/S12/S12X
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 520-1038; INDART-ONE

8
Working with S12(X) Devices
Another parameter, “BDM Clock Source”, specifies the link between the
microcontroller’s bus frequency and the BDM clock frequency during
debugging. The BDM clock source can be selected by the CLKSW bit in the
BDM Status register.
Which CLKSW setting to use depends on the target system and on the user
application. The idea is to set the CLKSW bit so that the highest (and less
subject to changes) clock frequency is used for the BDM communication. A
low clock frequency will result in slow BDM communication (and therefore
slow debugging), while a clock frequency which changes frequently (as in
the case of the user application modifying the PLL peripheral) may result in
loss of BDM communication.
The “Enable Fast Programming” parameter, if selected, speeds up
programming by driving the microcontroller’s internal PLL circuitry to the
maximum settings. In order for this feature to work, an appropriate loop filter
circuitry must be provided to the device’s XFC pin.
The “TARGET POWER OUT Voltage” parameter specifies the voltage
provided by inDART-One on the “TARGET POWER OUT” connector, which
can be used to power up your target board.
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devices the frequency detection is totally accurate. For devices which
do not support the SYNC command, the automatic frequency detection
may not be accurate.
“Manual”: alternatively, you can manually specify the microcontroller’s
BDM frequency. Usually, this value is half that of the external oscillator
frequency. Since this frequency is also used by the programming
algorithms, it is important to carefully specify this parameter.
Programming the device with an incorrect BDM frequency may result in
stress to the FLASH/EEPROM memory cells, thus reducing the lifetime
of the memory.
If the CLKSW bit is set to 1, the BDM communication clock source is
the microcontroller’s bus frequency.
If the CLKSW bit is set to 0, the BDM communication clock source is a
constant clock source (not dependent on the bus frequency), which can
vary depending on the specific S12 derivative. In the case of the
MC9S12DP256, for example, this constant clock source is half the
frequency of the external oscillator.