CANx_CTRL1 field descriptions
Field
Description
31–24
PRESDIV
Prescaler Division Factor
This 8-bit field defines the ratio between the PE clock frequency and the Serial Clock (Sclock) frequency.
The Sclock period defines the time quantum of the CAN protocol. For the reset value, the Sclock
frequency is equal to the PE clock frequency. The Maximum value of this field is 0xFF, that gives a
minimum Sclock frequency equal to the PE clock frequency divided by 256. See
. This field
can be written only in Freeze mode because it is blocked by hardware in other modes.
Sclock frequency = PE clock frequency / (P 1)
23–22
RJW
Resync Jump Width
This 2-bit field defines the maximum number of time quanta that a bit time can be changed by one re-
synchronization. One time quantum is equal to the Sclock period. The valid programmable values are 0–3.
This field can be written only in Freeze mode because it is blocked by hardware in other modes.
Resync Jump Width = RJW + 1.
21–19
PSEG1
Phase Segment 1
This 3-bit field defines the length of Phase Segment 1 in the bit time. The valid programmable values are
0–7. This field can be written only in Freeze mode because it is blocked by hardware in other modes.
Phase Buffer Segment 1 = (PSEG1 + 1) × Time-Quanta.
18–16
PSEG2
Phase Segment 2
This 3-bit field defines the length of Phase Segment 2 in the bit time. The valid programmable values are
1–7. This field can be written only in Freeze mode because it is blocked by hardware in other modes.
Phase Buffer Segment 2 = (PSEG2 + 1) × Time-Quanta.
15
BOFFMSK
Bus Off Interrupt Mask
This bit provides a mask for the Bus Off Interrupt BOFFINT in CAN_ESR1 register.
0
Bus Off interrupt disabled.
1
Bus Off interrupt enabled.
14
ERRMSK
Error Interrupt Mask
This bit provides a mask for the Error Interrupt ERRINT in the CAN_ESR1 register.
0
Error interrupt disabled.
1
Error interrupt enabled.
13
CLKSRC
CAN Engine Clock Source
This bit selects the clock source to the CAN Protocol Engine (PE) to be either the peripheral clock or the
oscillator clock. The selected clock is the one fed to the prescaler to generate the Serial Clock (Sclock). In
order to guarantee reliable operation, this bit can be written only in Disable mode because it is blocked by
hardware in other modes. See
NOTE: Please refer to the clock distribution chapter (module clocks table) to identify the proper clock
source.
NOTE: The user must ensure the protocol engine clock tolerance according to the CAN Protocol
standard (ISO 11898-1).
0
The CAN engine clock source is the oscillator clock. Under this condition, the oscillator clock
frequency must be lower than the bus clock.
1
The CAN engine clock source is the peripheral clock.
Table continues on the next page...
Memory map/register definition
Kinetis KE1xF Sub-Family Reference Manual, Rev. 4, 06/2019
1398
NXP Semiconductors
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...