SH7760 Datasheet, PDF (818/1345 Pages) Renesas Technology Corp – SuperHTM RISC engine

Table 22.3 Settings of Mailbox Functions
MBC2
0
0
0
0
1
1
1
1
MBC1
0
0
1
1
0
0
1
1
MBC0
0
1
0
1
0
1
0
1
Data Remote
Frame Frame
Transmit Transmit
Yes
Yes
Yes
Yes
No
No
No
No
No
Yes
No
Yes
Data
Frame
Receive
Remote
Frame
Receive
No
No _•
No
Yes _•
•
•
Yes
Yes _•
•
Yes
No _•
•
Yes
Yes _•
•
Yes
No _•
•
Setting prohibited
Mailbox inactive
Remarks
Not allowed for Mailbox 0
Can be used with ATX
Not allowed for Mailbox 0
LAFM can be used
Allowed for Mailbox 0
LAFM can be used
Allowed for Mailbox 0
LAFM can be used
Not allowed for Mailbox 0
LAFM can be used
Not allowed for Mailbox 0
LAFM can be used
(2) (Mailbox) Timestamp Field
Storage for the Timestamp on message for transmit/receive. The Timestamp is a function
useful for monitoring when a message is transmitted/received: it can be used to verify if the
reception/transmission of messages are within an expected schedule.
(3) Message Data Field
Storage for the CAN message data that is transmitted or received. MSG_DATA_0 corresponds
to the first data byte that is transmitted or received. The bit order on the bus is bit 7 through to
bit 0.
(4) Local Acceptance Filter Mask (LAFM)
This area is used as the Local Acceptance Filter Mask (LAFM) for a receive mailboxes.
• LAFM
The LAFM is comprised of two 16-bit read/write areas as follows. It allows a Mailbox to
accept more than one identifier for receive.
Rev. 1.0, 02/03, page 768 of 1294