Table 50-7. DATA BYTEs validity (continued)
DLC
Valid DATA BYTEs
6
DATA BYTE 0 to 5
7
DATA BYTE 0 to 6
8 or above
DATA BYTE 0 to 7
50.4.54 Rx FIFO structure
When the CAN_MCR[RFEN] bit is set, the memory area from 0x80 to 0xDC (which is
normally occupied by MBs 0–5) is used by the reception FIFO engine.
The region 0x80-0x8C contains the output of the FIFO which must be read by the CPU as
a message buffer. This output contains the oldest message that has been received but not
yet read. The region 0x90-0xDC is reserved for internal use of the FIFO engine.
An additional memory area, which starts at 0xE0 and may extend up to 0x17C (normally
occupied by MBs 6–15) depending on the CAN_CTRL2[RFFN] field setting, contains
the ID filter table (configurable from 8 to 40 table elements) that specifies filtering
criteria for accepting frames into the FIFO.
Out of reset, the ID filter table flexible memory area defaults to 0xE0 and extends only to
0xFC, which corresponds to MBs 6 to 7 for RFFN = 0, for backward compatibility with
previous versions of FlexCAN.
The following shows the Rx FIFO data structure.
Table 50-8. Rx FIFO structure
31
28
24
23
22
21
20
19
18
17
16
15
8
7
0
0x80
IDHIT
SRR
IDE RTR
DLC
TIME STAMP
0x84
ID standard
ID extended
0x88
Data byte 0
Data byte 1
Data byte 2
Data byte 3
0x8C
Data byte 4
Data byte 5
Data byte 6
Data byte 7
0x90
to
0xDC
Reserved
0xE0
ID filter table element 0
0xE4
ID filter table element 1
0xE8
to
0x2D4
ID filter table elements 2 to 125
0x2D8
ID filter table element 126
Table continues on the next page...
Chapter 50 CAN (FlexCAN)
Kinetis KE1xF Sub-Family Reference Manual, Rev. 4, 06/2019
NXP Semiconductors
1431
Содержание KE1xF Series
Страница 2: ...Kinetis KE1xF Sub Family Reference Manual Rev 4 06 2019 2 NXP Semiconductors...
Страница 60: ...SysTick Clock Configuration Kinetis KE1xF Sub Family Reference Manual Rev 4 06 2019 60 NXP Semiconductors...
Страница 114: ...Initialization application information Kinetis KE1xF Sub Family Reference Manual Rev 4 06 2019 114 NXP Semiconductors...
Страница 138: ...Usage Guide Kinetis KE1xF Sub Family Reference Manual Rev 4 06 2019 138 NXP Semiconductors...
Страница 320: ...Private Peripheral Bus PPB memory map Kinetis KE1xF Sub Family Reference Manual Rev 4 06 2019 320 NXP Semiconductors...
Страница 342: ...Functional Description Kinetis KE1xF Sub Family Reference Manual Rev 4 06 2019 342 NXP Semiconductors...
Страница 360: ...Usage Guide Kinetis KE1xF Sub Family Reference Manual Rev 4 06 2019 360 NXP Semiconductors...
Страница 490: ...Interrupts Kinetis KE1xF Sub Family Reference Manual Rev 4 06 2019 490 NXP Semiconductors...
Страница 550: ...Memory map and register definition Kinetis KE1xF Sub Family Reference Manual Rev 4 06 2019 550 NXP Semiconductors...
Страница 562: ...Boot Kinetis KE1xF Sub Family Reference Manual Rev 4 06 2019 562 NXP Semiconductors...
Страница 662: ...Power supply supervisor Kinetis KE1xF Sub Family Reference Manual Rev 4 06 2019 662 NXP Semiconductors...
Страница 694: ...On chip resource access control mechanism Kinetis KE1xF Sub Family Reference Manual Rev 4 06 2019 694 NXP Semiconductors...
Страница 706: ...Usage Guide Kinetis KE1xF Sub Family Reference Manual Rev 4 06 2019 706 NXP Semiconductors...
Страница 724: ...Application Information Kinetis KE1xF Sub Family Reference Manual Rev 4 06 2019 724 NXP Semiconductors...
Страница 736: ...Usage Guide Kinetis KE1xF Sub Family Reference Manual Rev 4 06 2019 736 NXP Semiconductors...
Страница 750: ...Debug and Security Kinetis KE1xF Sub Family Reference Manual Rev 4 06 2019 750 NXP Semiconductors...
Страница 798: ...Functional description Kinetis KE1xF Sub Family Reference Manual Rev 4 06 2019 798 NXP Semiconductors...
Страница 808: ...Functional description Kinetis KE1xF Sub Family Reference Manual Rev 4 06 2019 808 NXP Semiconductors...
Страница 866: ...Usage Guide Kinetis KE1xF Sub Family Reference Manual Rev 4 06 2019 866 NXP Semiconductors...
Страница 1164: ...Usage Guide Kinetis KE1xF Sub Family Reference Manual Rev 4 06 2019 1164 NXP Semiconductors...
Страница 1178: ...Usage Guide Kinetis KE1xF Sub Family Reference Manual Rev 4 06 2019 1178 NXP Semiconductors...
Страница 1380: ...Usage Guide Kinetis KE1xF Sub Family Reference Manual Rev 4 06 2019 1380 NXP Semiconductors...
Страница 1472: ...Kinetis KE1xF Sub Family Reference Manual Rev 4 06 2019 1472 NXP Semiconductors...
Страница 1482: ...Kinetis KE1xF Sub Family Reference Manual Rev 4 06 2019 1482 NXP Semiconductors...