SH7059 Datasheet, PDF (520/1042 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer

17. Controller Area Network-II (HCAN-II)
Register Name Address
Bit
MBx[4], MBx[5]* H'104 + N • 32 11
Bit Name
DART
10 to 8 MBC[2:0]
7
⎯
6
TCT
Description
Disable Automatic Retransmission
When this bit is set, it disables the automatic retransmission of a
message in the event of an error on the CAN bus or an arbitration
lost on the CAN bus. When this function is used, the
corresponding TXCR bit is automatically set at the start of
transmission. When this bit is cleared, the HCAN tries to transmit
the message as many times as required until it is successfully
transmitted or it is cancelled by the TXCR.
Important: This function is not supported by this LSI.
Thus the write value should be 0.
Values read out in the initial state are not guaranteed.
Mailbox Configuration
Mailbox functions are set as shown in table 17.3.
When MBC = 111, the mailbox is inactive, i.e., it does not receive
or transmit a message regardless of TXPR or other settings.
When MBC = 000 and the TTE bit is set, the Tx-trigger time field
becomes available. The MBC = 110 or 011 setting is prohibited.
When MBC is set to any other value, the LAFM field becomes
available.
Important: MB0 should be used as receive-only (MBC = 010).
Reserved
The write value should be 0. Values read out in the initial state
are not guaranteed.
Timer Counter Transmission
When this bit is set, a mailbox is set for transmission, and the
DLC is set to 4, the TCNTR value, at the SOF, is embedded in
the second and third bytes of the message data, instead of
MSG_DATA_2 and MSG_DATA_3, and the CYCLE_COUNT in
the first byte instead of MSG_DATA_0[3:0] when this mailbox
starts transmission.
This function will be useful when the HCAN performs a time
master role to transmit the time reference message.
For example, considering that two HCAN controllers are
connected in the same network and that the receiver stores the
message in mailbox N, the data format is shown as Figure 17.4
depending on the endian setting for the CAN bus (MCR4).
Important: This function is not supported by this LSI.
Thus the write value should be 0.
The read value is not guaranteed.
Rev.3.00 Mar. 12, 2008 Page 430 of 948
REJ09B0177-0300