K60P100M100SF2RM Datasheet, PDF (1344/1809 Pages) Freescale Semiconductor, Inc – K60 Sub-Family Reference Manual

Memory Map/Register Definition
CANx_RXFGMASK field descriptions (continued)
Field
Rx FIFO ID
Filter Table
Elements
Format
(MCR[IDAM])
RTR
A
FGM[31]
B
FGM[31],
FGM[15]
C
-
Description
Identifier Acceptance Filter Fields
IDE
RXIDA
RXIDB¹
RXIDC²
Reserved
FGM[30]
FGM[30],
FGM[14]
-
FGM[29:1]
-
-
-
FGM[0]
FGM[29:16],
-
FGM[13:0]
-
FGM[31:24],
FGM[23:16],
FGM[15:8],
FGM[7:0]
1. If MCR[IDAM] field is equivalent to the format B only the fourteen most significant bits of the Identifier
of the incoming frame are compared with the Rx FIFO filter.
2. If MCR[IDAM] field is equivalent to the format C only the eight most significant bits of the Identifier of
the incoming frame are compared with the Rx FIFO filter.
0 The corresponding bit in the filter is "don’t care."
1 The corresponding bit in the filter is checked.
1. If MCR[IDAM] field is equivalent to the format B only the fourteen most significant bits of the Identifier of the incoming frame
are compared with the Rx FIFO filter.
2. If MCR[IDAM] field is equivalent to the format C only the eight most significant bits of the Identifier of the incoming frame
are compared with the Rx FIFO filter.
48.3.18 Rx FIFO Information Register (CANx_RXFIR)
RXFIR provides information on Rx FIFO.
This register is the port through which the CPU accesses the output of the RXFIR FIFO
located in RAM. The RXFIR FIFO is written by the FlexCAN whenever a new message
is moved into the Rx FIFO as well as its output is updated whenever the output of the Rx
FIFO is updated with the next message. See Section "Rx FIFO" for instructions on
reading this register.
Addresses: CAN0_RXFIR is 4002_4000h base + 4Ch offset = 4002_404Ch
CAN1_RXFIR is 400A_4000h base + 4Ch offset = 400A_404Ch
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
0
IDHIT
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.
1344
K60 Sub-Family Reference Manual, Rev. 6, Nov 2011
Freescale Semiconductor, Inc.