upd70f3402 Renesas Electronics Corporation., upd70f3402 Datasheet - Page 635

• Manufacturer Part Number: upd70f3402
• Description: 32-/16-bit Single-chip Microcontroller With Can Interface
• Manufacturer: Renesas Electronics Corporation.

16.9.5 Remote frame reception
In all the operation modes, when a remote frame is received, the message buffer that is to store the
remote frame is searched from all the message buffers satisfying the following conditions.
Upon acceptance of a remote frame, the following actions are executed if the ID of the received remote
frame matches the ID of a message buffer that satisfies the above conditions.
Caution:
Remark:
• Used as a message buffer
• Set as a transmit message buffer
• Ready for reception
• Set to transmit message
• Transmission request is not set.
• The DLC[3:0] bit string in the CnMDLCm register stores the received DLC value.
• CnMDATA0m to CnMDATA7m in the data area are not updated (data before reception is saved).
• The DN bit of the CnMCTRLm register is set to 1.
• The CINTS1 bit of the CnINTS register is set to 1 (if the IE bit in the CnMCTRLm register of the
• The receive completion interrupt (INTRECn) is output (if the IE bit in the CnMCTRLm register of
• The message buffer number is recorded in the receive history list.
(MA0 bit of CnMCONFm register set to 1B.)
(MT[2:0] bits in CnMCONFm register set to 000B)
(RDY bit of CnMCTRLm register set to 1.)
(RTR bit of CnMCONFm register is cleared to 0.)
(TRQ bit of CnMCTRLm register is cleared to 1.)
message buffer that receives and stores the frame is set to 1).
the message buffer that receives and stores the frame is set to 1 and if the CIE1 bit of the CnIE
register is set to 1).
When a message buffer is searched for receiving and storing a remote frame, over-
write control by the OWS bit of the CnMCONFm register of the message buffer and
the DN bit of the CnMCTRLm register are not affected.
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.
n = 0, 1
m = 0 to 31
User’s Manual U16702EE3V2UD00
Chapter 16 FCAN Controller
635