FD Bit rate Parameter Definitions

Defines the different configuration parameters used to create a Flexible Data rate string for FD capable PCAN Channels initialization.

Clock Frequency parameters

Type	Identifier	Value	Description
String	PCAN_BR_CLOCK	"f_clock"	Clock frequency in Hertz (80000000, 60000000, 40000000, 30000000, 24000000, 20000000).
String	PCAN_BR_CLOCK_MHZ	"f_clock_mhz"	Clock frequency in Megahertz (80, 60, 40, 30, 24, 20).

Nominal Bit rate parameters

Type	Identifier	Value	Description
String	PCAN_BR_NOM_BRP	"nom_brp"	Clock prescaler for nominal time quantum (1..1024).
String	PCAN_BR_NOM_TSEG1	"nom_tseg1"	TSEG1 segment for nominal bit rate in time quanta (1..256).
String	PCAN_BR_NOM_TSEG2	"nom_tseg2"	TSEG2 segment for nominal bit rate in time quanta (1..128).
String	PCAN_BR_NOM_SJW	"nom_sjw"	Synchronization Jump Width for nominal bit rate in time quanta (1..128).

Data Bit rate parameters

Type	Identifier	Value	Description
String	PCAN_BR_DATA_BRP	"data_brp"	Clock prescaler for fast data time quantum (1..1024).
String	PCAN_BR_DATA_TSEG1	"data_tseg1"	TSEG1 segment for fast data bit rate in time quanta (1..32).
String	PCAN_BR_DATA_TSEG2	"data_tseg2"	TSEG2 segment for fast data bit rate in time quanta (1..16).
String	PCAN_BR_DATA_SJW	"data_sjw"	Synchronization Jump Width for fast data bit rate in time quanta (1..16).

Remarks

These values are declared as object fields in an object oriented environment (Delphi, .NET Framework) and declared as #define's in C++ (plain API).

Following points are to be respected in order to construct a valid FD Bit rate string:

The string must contain only one of the two possible Clock Frequency parameters. Example: "f_clock_mhz=80"
The value for each used identifier must be one of the values listed for it in the Range table. Example: "f_clock=80000000"
The value for each parameter must be separated with a '='. Example: "data_brp=1"
Each pair of parameter/value must be separated with a ','. Blank spaces are allowed but are not necessary. Example: "f_clock_mhz=24, nom_brp=1,"
According to the kind of bit rate being defined, all 4 parameters listed in the nominal or data bit rate section are to be used. Example: "nom_brp=5, nom_tseg1=2, nom_tseg2=1, nom_sjw=1"
Either the nominal bit rate or both, nominal and data bit rate, must be defined within the parameter string. Example: "f_clock_mhz=20, nom_brp=5, nom_tseg1=2, nom_tseg2=1, nom_sjw=1"

Example with nominal Bit rate only:

A valid string representing 1 Mbit/sec for both, nominal and data Bit rates:

"f_clock_mhz=20, nom_brp=5, nom_tseg1=2, nom_tseg2=1, nom_sjw=1"

Example with nominal and data Bit rate:

A valid string representing 1 Mbit/sec for nominal Bit rate, and 2 Mbit/sec for data Bit rate:

"f_clock_mhz=20, nom_brp=5, nom_tseg1=2, nom_tseg2=1, nom_sjw=1, data_brp=2, data_tseg1=3, data_tseg2=1, data_sjw=1"

Parameter Value Ranges