Address: Base a 18h offset
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_RX15MASK field descriptions
Field
Description
RX15M
Rx Buffer 15 Mask Bits
Each mask bit masks the corresponding Mailbox 15 filter field in the same way that RXMGMASK masks
other Mailboxes' filters. See the description of the CAN_RXMGMASK register.
0
The corresponding bit in the filter is "don’t care."
1
The corresponding bit in the filter is checked.
50.4.8 Error Counter (CANx_ECR)
This register has two 8-bit fields reflecting the value of the FlexCAN error counters:
• Transmit Error Counter (TXERRCNT field)
• Receive Error Counter (RXERRCNT field)
The Fault Confinement State (FLTCONF field in Error and Status Register 1 -
CAN_ESR1) is updated based on TXERRCNT and RXERRCNT counters. TXERRCNT
and RXERRCNT counters can be written in Freeze mode only. The rules for increasing
and decreasing these counters are described in the CAN protocol and are completely
implemented in the FlexCAN module.
The following are the basic rules for FlexCAN bus state transitions:
• If the value of TXERRCNT or RXERRCNT increases to be greater than or equal to
128, the FLTCONF field in the Error and Status Register is updated to reflect "Error
Passive" state.
• If the FlexCAN state is "Error Passive", and either TXERRCNT or RXERRCNT
decrements to a value less than or equal to 127 while the other already satisfies this
condition, the FLTCONF field in the Error and Status Register is updated to reflect
"Error Active" state.
• If the value of TXERRCNT increases to be greater than 255, the FLTCONF field in
the Error and Status Register is updated to reflect "Bus Off" state, and an interrupt
may be issued. The value of TXERRCNT is then reset to zero.
Memory map/register definition
Kinetis KE1xF Sub-Family Reference Manual, Rev. 4, 06/2019
1404
NXP Semiconductors
Содержание KE1xF Series
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