MC9S08DZ16 FREESCALE [Freescale Semiconductor, Inc], MC9S08DZ16 Datasheet - Page 228

• Manufacturer Part Number: MC9S08DZ16
• Description: 8-Bit HCS08 Central Processor Unit (CPU)
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

Chapter 12 Freescale’s Controller Area Network (S08MSCANV1)
12.3.4
The CANBTR1 register configures various CAN bus timing parameters of the MSCAN module.
Read: Anytime
Write: Anytime in initialization mode (INITRQ = 1 and INITAK = 1)
1
228
TSEG2[2:0]
TSEG1[3:0]
In this case, PHASE_SEG1 must be at least 2 time quanta (Tq).
SAMP
Field
6:4
3:0
7
Reset:
W
R
BRP5
MSCAN Bus Timing Register 1 (CANBTR1)
Sampling — This bit determines the number of CAN bus samples taken per bit time.
0 One sample per bit.
1 Three samples per bit
If SAMP = 0, the resulting bit value is equal to the value of the single bit positioned at the sample point. If
SAMP = 1, the resulting bit value is determined by using majority rule on the three total samples. For higher bit
rates, it is recommended that only one sample is taken per bit time (SAMP = 0).
Time Segment 2 — Time segments within the bit time fix the number of clock cycles per bit time and the location
of the sample point (see
Table
Time Segment 1 — Time segments within the bit time fix the number of clock cycles per bit time and the location
of the sample point (see
Table
0
0
0
0
1
:
SAMP
0
7
12-7.
12-8.
BRP4
0
0
0
0
1
:
Figure 12-7. MSCAN Bus Timing Register 1 (CANBTR1)
TSEG22
Table 12-6. CANBTR1 Register Field Descriptions
BRP3
6
0
0
0
0
0
1
:
Table 12-5. Baud Rate Prescaler
1
Figure
Figure
.
MC9S08DZ60 Series Data Sheet, Rev. 4
BRP2
TSEG21
0
0
0
0
1
:
12-43). Time segment 2 (TSEG2) values are programmable as shown in
12-43). Time segment 1 (TSEG1) values are programmable as shown in
0
5
BRP1
0
0
1
1
1
:
TSEG20
4
0
BRP0
Description
0
1
0
1
1
:
TSEG13
0
3
Prescaler value (P)
TSEG12
64
2
0
1
2
3
4
:
TSEG11
Freescale Semiconductor
0
1
TSEG10
0
0