MAC7200 datasheet(614/976 Pages) FREESCALE

614 / 976 page

The Generic FlexCAN2 Module

MAC7200 Microcontroller Family Reference Manual, Rev. 2

536

Freescale Semiconductor

Figure 28-13. Segments within the Bit Time

Figure 28-17 gives an overview of the CAN compliant segment settings and the related parameter values.

Table 28-16. Time Segment Syntax

Syntax

Description

SYNC_SEG

System expects transitions to occur on the bus during this period.

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.

Table 28-17. CAN Standard Compliant Bit Time Segment Settings

Time Segment 1

Time Segment 2

Re-synchronization

Jump Width

5 .. 10

1 .. 2

4 .. 11

1 .. 3

5 .. 12

1 .. 4

6 .. 13

1 .. 4

7 .. 14

1 .. 4

8 .. 15

1 .. 4

9 .. 16

1 .. 4

SYNC_SEG

Time Segment 1

Time Segment 2

4 ... 16

2 ... 8

8 ... 25 Time Quanta

= 1 Bit Time

NRZ Signal

Sample Point

(single or triple sampling)

(PROP_SEG + PSEG1 + 2)

(PSEG2 + 1)

Transmit Point

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