CAN_RXIMR registers can only be accessed by the CPU while the module is in Freeze
mode, otherwise, they are blocked by hardware. These registers are not affected by reset.
They are located in RAM and must be explicitly initialized prior to any reception.
It is possible for the RXIMR memory region to be accessed as general purpose memory.
See
Address: Base a 880h (4d × i), where i=0d to 15d
Bit 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10
9
8
7
6
5
4
3
2
1
0
R
W
Reset
x* x* x* x* x* x* x* x* x* x* x* x* x* x* x* x* x* x* x* x* x* x* x* x* x* x* x* x* x* x* x* x*
* Notes:
x = Undefined at reset.
•
CANx_RXIMRn field descriptions
Field
Description
MI
Individual Mask Bits
Each Individual Mask Bit masks the corresponding bit in both the Mailbox filter and Rx FIFO ID Filter Table
element in distinct ways.
For Mailbox filters, see the RXMGMASK register description.
For Rx FIFO ID Filter Table elements, see the RXFGMASK register description.
0
The corresponding bit in the filter is "don't care."
1
The corresponding bit in the filter is checked.
50.4.53 Message buffer structure
The message buffer structure used by the FlexCAN module is represented in the
following figure. Both Extended (29-bit identifier) and Standard (11-bit identifier) frames
used in the CAN specification (Version 2.0 Part B) are represented. Each individual MB
is formed by 16 bytes.
The memory area from 0x80 to 0x17F is used by the mailboxes.
Table 50-4. Message buffer structure
31
30
29 28 27
24 23
22
21
20
19 18 17 16 15
8
7
0
0x0
CODE
SRR IDE RTR
DLC
TIME STAMP
0x4
PRIO
ID (Standard/Extended)
ID (Extended)
0x8
Data Byte 0
Data Byte 1
Data Byte 2
Data Byte 3
0xC
Data Byte 4
Data Byte 5
Data Byte 6
Data Byte 7
= Unimplemented or Reserved
Chapter 50 CAN (FlexCAN)
Kinetis KE1xF Sub-Family Reference Manual, Rev. 4, 06/2019
NXP Semiconductors
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Содержание KE1xF Series
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