SH7760 Datasheet, PDF (819/1345 Pages) Renesas Technology Corp – SuperHTM RISC engine

H'110 + N*32 0
H'112 + N*32
STDID_LAFM[10:0]
EXTID_LAFM[15:0]
0
0
EXTID_LAFM
[17:16]
16 bits _{LAFM field}
16 bits
Figure 22.4 Acceptance Filter
If a bit is set in the LAFM, the corresponding bit of the received CAN identifier is ignored when
the HCAN2 searches a Mailbox with the matching CAN identifier. If the bit is cleared, the
corresponding bit of the received CAN identifier must match the STD_ID/EXT_ID set in the
mailbox, in which the CAN frame is to be stored. The structure of the LAFM is the same as the
Message Control in a Mailbox. If this function is not required, it must be filled with 0.
Notes: 1. HCAN2 starts to find a matching identifier from Mailbox 31 down to Mailbox 0. As
soon as HCAN2 finds one, it stops the search and stores the message into the Mailbox.
This means that a received message can only be stored in 1 Mailbox.
2. When a message is received and a matching Mailbox is found, the whole message is
stored into the Mailbox. This means that, if the LAFM is used, the STD_ID, RTR, IDE,
and EXT_ID may differ to the ones originally set as they are updated with the
STD_ID, RTR, IDE, and EXT_ID of the received message.
Address
Bit Bit Name
Description
H'110 + N*32 15 
Reserved
The write value should always be 0. The read value is not
guaranteed.
14 STDID_LAFM Filter Mask [10:0] bits for the CAN Base Identifier [10:0]
to 4 10 to
0: Corresponding CAN base ID set in Mailbox 0 is enabled.
STDID_LAFM _{1: Corresponding CAN base ID set in Mailbox 0 is disabled.}
0
3, 2 
Reserved
The write value should always be 0. The read value is not
guaranteed.
1 EXTID_LAFM Filter Mask [17:16] bits for the CAN Extended Identifier
0 17,
[17:16]
EXTID_LAFM _{0: Corresponding Extended CAN base ID is enabled.}
16
1: Corresponding Extended CAN base ID is disabled.
H'112 + N*32
15 EXTID_LAFM
to 0 15 to
EXTID_LAFM
0
Filter Mask [15:0] bits for the CAN Extended Identifier [15:0]
0: Corresponding Extended CAN base ID is enabled.
1: Corresponding Extended CAN base ID is disabled.
Rev. 1.0, 02/03, page 769 of 1294