r5f71374an80fpv Renesas Electronics Corporation., r5f71374an80fpv Datasheet - Page 759

• Manufacturer Part Number: r5f71374an80fpv
• Description: 32-bit Risc Microcomputer Superh?? Risc Engine Family
• Manufacturer: Renesas Electronics Corporation.

Important: Please note that, when this function is used, the RTR bit will never be set despite
receiving a Remote Frame. When a Remote Frame is received, the CPU will be notified by the
corresponding RFPR set, however, as RCAN-ET needs to transmit the current message as a Data
Frame, the RTR bit remains unchanged.
Important: Please note that in case of overrun condition (UMSR flag set when the Mailbox has
its NMC = 0) the message received is discarded. In case a remote frame is causing overrun into a
Mailbox configured with ATX = 1, the transmission of the corresponding data frame may be
triggered only if the related RFPR flag is cleared by the CPU when the UMSR flag is set. In such
case RFPR flag would get set again.
DART (Disable Automatic Re-Transmission): When this bit is set, it disables the automatic re-
transmission of a message in the event of an error on the CAN bus or an arbitration lost on the
CAN bus. In effect, when this function is used, the corresponding TXCR bit is automatically set at
the start of transmission. When this bit is set to ‘0’, RCAN-ET tries to transmit the message as
many times as required until it is successfully transmitted or it is cancelled by the TXCR.
MBC[2:0] (Mailbox Configuration): These bits configure the nature of each Mailbox as follows.
When MBC=111 (Bin), the Mailbox is inactive, i.e., it does not receive or transmit a message
regardless of TXPR or other settings. The MBC=’110’, ‘101’ and ‘100’ settings are prohibited.
When the MBC is set to any other value, the LAFM field becomes available. Please don't set
TXPR when MBC is set as reception. There is no hardware protection, and TXPR remains set.
MBC[1] of Mailbox-0 is fixed to "1" by hardware. This is to ensure that MB0 cannot be
configured to transmit Messages.
ATX
0
1
DART
0
1
Description
Automatic Transmission of Data Frame disabled (Initial value)
Automatic Transmission of Data Frame enabled
Description
Re-transmission enabled (Initial value)
Re-Transmission disabled
Section 19 Controller Area Network (RCAN-ET)
Rev. 1.00 Sep. 21, 2007 Page 733 of 1124
REJ09B0402-0100