MC68HC08AZ32A Datasheet, PDF (345/456 Pages) Motorola, Inc – HCMOS Microcontroller Unit

Freescale Semiconductor, Inc.
MSCAN08 Controller (MSCAN08)
Clock System
NRZ SIGNAL
SYNC
_SEG
1
TIME SEGMENT 1
(PROP_SEG + PHASE_SEG1)
4 ... 16
8... 25 TIME QUANTA
= 1 BIT TIME
TIME SEG. 2
(PHASE_SEG2)
2 ... 8
SAMPLE POINT
(SINGLE OR TRIPLE SAMPLING)
Figure 20-8. Segments Within the Bit Time
Table 20-3. Time segment syntax
SYNC_SEG
Transmit point
Sample point
System expects transitions to occur on the bus
during this period.
A node in transmit mode will transfer a new
value to the CAN bus at this point.
A node in receive mode will sample the bus at
this point. If the three samples per bit option is
selected then this point marks the position of
the third sample.
Time
Segment 1
5 .. 10
4 .. 11
5 .. 12
6 .. 13
7 .. 14
8 .. 15
9 .. 16
TSEG1
4 .. 9
3 .. 10
4 .. 11
5 .. 12
6 .. 13
7 .. 14
8 .. 15
Time
Segment 2
2
3
4
5
6
7
8
TSEG2
1
2
3
4
5
6
7
Synchron.
Jump Width
1 .. 2
1 .. 3
1 .. 4
1 .. 4
1 .. 4
1 .. 4
1 .. 4
SJW
0 .. 1
0 .. 2
0 .. 3
0 .. 3
0 .. 3
0 .. 3
0 .. 3
Table 20-4. CAN Standard Compliant Bit Time Segment Settings
MC68HC08AZ32A — Rev 1.0
MOTOROLA
MSCAN08 Controller (MSCAN08)
For More Information On This Product,
Go to: www.freescale.com
Technical Data
345