K60P100M100SF2RM Datasheet, PDF (1345/1809 Pages) Freescale Semiconductor, Inc – K60 Sub-Family Reference Manual

Field
31–9
Reserved
8–0
IDHIT
CANx_RXFIR field descriptions
Description
This read-only field is reserved and always has the value zero.
Chapter 48 CAN (FlexCAN)
Identifier Acceptance Filter Hit Indicator
This field indicates which Identifier Acceptance Filter was hit by the received message that is in the output
of the Rx FIFO. If multiple filters match the incoming message ID then the first matching IDAF found
(lowest number) by the matching process is indicated. This field is valid only while the IFLAG[BUF5I] is
asserted.
48.3.19 Rx Individual Mask Registers (CANx_RXIMR)
These registers are located in RAM.
RXIMR are used as acceptance masks for ID filtering in Rx MBs and the Rx FIFO. If the
Rx FIFO is not enabled, one mask register is provided for each available Mailbox,
providing ID masking capability on a per Mailbox basis.
When the Rx FIFO is enabled (MCR[RFEN] bit is asserted), up to 32 Rx Individual
Mask Registers can apply to the Rx FIFO ID Filter Table elements on a one-to-one
correspondence depending on the setting of CTRL2[RFFN].
RXIMR can only be written by the CPU while the module is in Freeze Mode; otherwise,
they are blocked by hardware.
The Individual Rx Mask Registers are not affected by reset and must be explicitly
initialized prior to any reception.
Addresses: 4002_4000h base + 880h offset + (4d × n), where n = 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
MI[31:0]
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.
Field
31–0
MI[31:0]
CANx_RXIMRn field descriptions
Individual Mask Bits
Description
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.
K60 Sub-Family Reference Manual, Rev. 6, Nov 2011
Freescale Semiconductor, Inc.
1345