MC9S12XDT512CAA Freescale, MC9S12XDT512CAA Datasheet - Page 429
MC9S12XDT512CAA
Manufacturer Part Number
MC9S12XDT512CAA
Description
Manufacturer
Freescale
Datasheet
1.MC9S12XDT512CAA.pdf
(1348 pages)
Specifications of MC9S12XDT512CAA
Cpu Family
HCS12
Device Core Size
16b
Frequency (max)
40MHz
Interface Type
CAN/I2C/SCI/SPI
Total Internal Ram Size
32KB
# I/os (max)
59
Number Of Timers - General Purpose
12
Operating Supply Voltage (typ)
2.5/5V
Operating Supply Voltage (max)
2.75/5.5V
Operating Supply Voltage (min)
2.35/3.15V
On-chip Adc
8-chx10-bit
Instruction Set Architecture
CISC
Operating Temp Range
-40C to 85C
Operating Temperature Classification
Industrial
Mounting
Surface Mount
Pin Count
80
Package Type
PQFP
Program Memory Type
Flash
Program Memory Size
512KB
Lead Free Status / RoHS Status
Compliant
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10.3.2.4
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
Freescale Semiconductor
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
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
MSCAN Bus Timing Register 1 (CANBTR1)
0
0
0
0
1
:
SAMP
0
7
10-7.
10-8.
BRP4
0
0
0
0
1
:
Figure 10-7. MSCAN Bus Timing Register 1 (CANBTR1)
TSEG22
Table 10-6. CANBTR1 Register Field Descriptions
BRP3
0
6
0
0
0
0
1
:
Table 10-5. Baud Rate Prescaler
1
Figure
Figure
.
MC9S12XDP512 Data Sheet, Rev. 2.21
BRP2
TSEG21
0
0
0
0
1
:
10-44). Time segment 2 (TSEG2) values are programmable as shown in
10-44). Time segment 1 (TSEG1) values are programmable as shown in
0
5
BRP1
0
0
1
1
1
:
Chapter 10 Freescale’s Scalable Controller Area Network (S12MSCANV3)
TSEG20
0
4
BRP0
Description
0
1
0
1
1
:
TSEG13
3
0
Prescaler value (P)
TSEG12
64
0
2
1
2
3
4
:
TSEG11
0
1
TSEG10
0
0
429
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