NXP Semiconductors KE1xF Series, Reference Manual, Page: 1458 / 1483

Table 50-14. Time segment syntax (continued)
Syntax Description
TSEG2 Corresponds to the PSEG2 value.
Transmit Point A node in transmit mode transfers a new value to the CAN bus at this point.
Sample Point A node samples the bus at this point. If the three samples per bit option is selected, then this point
marks the position of the third sample.
The following table gives some examples of the CAN compliant segment settings for
Classical CAN format (Bosch CAN 2.0B) messages.
Table 50-15. Bosch CAN 2.0B standard compliant bit time segment settings
Time segment 1 Time segment 2 Re-synchronization jump width
5 .. 10 2 1 .. 2
4 .. 11 3 1 .. 3
5 .. 12 4 1 .. 4
6 .. 13 5 1 .. 4
7 .. 14 6 1 .. 4
8 .. 15 7 1 .. 4
9 .. 16 8 1 .. 4
Note
The user must ensure the bit time settings are in compliance
with the CAN Protocol standard (ISO 11898-1).
Whenever CAN bit is used as a measure of time duration (e.g. estimating the occurrence
of a CAN bit event in a message), the number of peripheral clocks in one CAN bit
(NumClkBit) can be calculated as:
NumClkBit
=
f CANCLK
f SYS
X (P 1) X (P PSEG1 + PSEG2 + 4)
where:
• NumClkBit is the number of peripheral clocks in one CAN bit;
• f
CANCLK
is the Protocol Engine (PE) Clock (see Figure "CAN Engine Clocking
Scheme"), in Hz;
• f
SYS
is the frequency of operation of the system (CHI) clock, in Hz;
• PSEG1 is the value in CAN_CTRL1[PSEG1] field;
• PSEG2 is the value in CAN_CTRL1[PSEG2] field;
Functional description
Kinetis KE1xF Sub-Family Reference Manual, Rev. 4, 06/2019
1458 NXP Semiconductors