UPD78F0838 Renesas Electronics Corporation., UPD78F0838 Datasheet - Page 613

• Manufacturer Part Number: UPD78F0838
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

15.9.6 Remote frame reception
is searched from all the message buffers satisfying the following conditions.
matches the ID of a message buffer that satisfies the above conditions.
In all the operation modes, when a remote frame is received, the message buffer that is to store the remote frame
- Used as a message buffer
- Set as a transmit message buffer
- Ready for reception
- Set to transmit message
- Transmission request is not set.
Upon acceptance of a remote frame, the following actions are executed if the ID of the received remote frame
- The MDLC [3:0] bit string in the C0MDLCm register stores the received DLC value.
- C0MDATA0m to C0MDATA7m in the data area are not updated (data before reception is saved).
- The DN bit of the C0MCTRLm register is set to 1.
- The CINTS1 bit of the C0INTS register is set to 1 (if the IE bit in the C0MCTRLm register of the message buffer
- The reception completion interrupt (INTC0REC) is output (if the IE bit in the C0MCTRLm register of the message
- The message buffer number is recorded to the receive history list.
(MA0 bit of C0MCONFm register set to 1B.)
(MT[2:0] bits in C0MCONFm register set to 000B)
(RDY bit of C0MCTRLm register set to 1.)
(RTR bit of C0MCONFm register is cleared to 0.)
(TRQ bit of C0MCTRLm register is cleared to 0.)
Caution When a message buffer is searched for receiving and storing a remote frame, overwrite control
Remark
that receives and stores the frame is set to 1).
buffer that receives and stores the frame is set to 1 and if the CIE1 bit of the C0IE register is set to 1).
by the OWS bit of the C0MCONFm register of the message buffer and the DN bit of the
C0MCTRLm register are not affected. The setting of OWS is ignored, and DN is set in any case.
If more than one transmit message buffer has the same ID and the ID of the received remote
frame matches that ID, the remote frame is stored in the transmit message buffer with the
lowest message buffer number.
m = 0 to 15
Preliminary User’s Manual U19748EJ1V0UD
CHAPTER 15 CAN CONTROLLER
611