S912XEP100J5MAG Datasheet, PDF (616/1324 Pages) Freescale Semiconductor, Inc – Features of the MC9S12XE-Family are listed here. Please see Table D-2.for memory options and Table D-2. for the peripheral features that are available on the different family members.

Chapter 16 Freescale’s Scalable Controller Area Network (S12MSCANV3)
Table 16-7. Baud Rate Prescaler
BRP5
0
0
0
0
:
1
BRP4
0
0
0
0
:
1
BRP3
0
0
0
0
:
1
BRP2
0
0
0
0
:
1
BRP1
0
0
1
1
:
1
BRP0
0
1
0
1
:
1
Prescaler value (P)
1
2
3
4
:
64
16.3.2.4 MSCAN Bus Timing Register 1 (CANBTR1)
The CANBTR1 register configures various CAN bus timing parameters of the MSCAN module.
Module Base + 0x0003
Access: User read/write⁽¹⁾
7
R
SAMP
W
6
TSEG22
5
TSEG21
4
TSEG20
3
TSEG13
2
TSEG12
Reset:
0
0
0
0
0
0
Figure 16-7. MSCAN Bus Timing Register 1 (CANBTR1)
1. Read: Anytime
Write: Anytime in initialization mode (INITRQ = 1 and INITAK = 1)
1
TSEG11
0
0
TSEG10
0
Table 16-8. CANBTR1 Register Field Descriptions
Field
Description
7
SAMP
Sampling — This bit determines the number of CAN bus samples taken per bit time.
0 One sample per bit.
1 Three samples per bit⁽¹⁾.
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).
6-4
Time Segment 2 — Time segments within the bit time fix the number of clock cycles per bit time and the location
TSEG2[2:0] of the sample point (see Figure 16-44). Time segment 2 (TSEG2) values are programmable as shown in
Table 16-9.
3-0
Time Segment 1 — Time segments within the bit time fix the number of clock cycles per bit time and the location
TSEG1[3:0] of the sample point (see Figure 16-44). Time segment 1 (TSEG1) values are programmable as shown in
Table 16-10.
1. In this case, PHASE_SEG1 must be at least 2 time quanta (Tq).
MC9S12XE-Family Reference Manual Rev. 1.25
616
Freescale Semiconductor