PCAN-Ethernet Gateway FD DR – User Manual
50
Configuring Custom Bit Rates with a Register String
In Expert mode, you can configure custom bit rates and sample
points with the bit rate definition mode
Set with register string
.
If this mode is selected, a single input field is provided to enter the
register string. This string specifies the clock frequency and the
register values of the nominal and data bit rates. In contrast to
configuring custom bit rates with register values, the register string
indicates the Time segment values instead of the Phase and
Propagation segment values.
The bit rate register string can be generated with the free
applications Bit Rate Calculation Tool or PCAN-View from
PEAK-System. Examples:
500 kbit/s Nominal BR, 80% Sample Point =
f_clock=80000000, nom_brp=1, nom_tseg1=127, nom_tseg2=32,
nom_sjw=32
500 kbit/s Nominal BR, 4 Mbit/s Data BR, 75% Sample Point =
f_clock=80000000, nom_brp=5, nom_tseg1=23, nom_tseg2=8,
nom_sjw=8, data_brp=5, data_tseg1=2, data_tseg2=1, data_sjw=1
1 Mbit/s Nominal BR, 4 Mbit/s Data BR, 80% Sample Point =
f_clock=80000000, nom_brp=1, nom_tseg1=63, nom_tseg2=16,
nom_sjw=16, data_brp=1, data_tseg1=15, data_tseg2=4, data_sjw=4
Note: The submitted values and the resulting bit rates are
checked. If the values are incorrect, or the calculated bit rates
are beyond the limits of the CAN transceiver, the data cannot
be saved.
The limits of the register values and bit rates are documented
in the previous section
Configuring Custom Bit Rates with
Register Values
.
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