upd70f3402 Renesas Electronics Corporation., upd70f3402 Datasheet - Page 664

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

Transmitting message buffer redefinition in the following according to cases, perform processing trans-
mitting message buffer redefinition flow.
664
Set CnMDATAxm register
Set CnMDLCm register
Clear RTR bit of CnMCONFm
register
Set CnMIDLm and CnMIDHm
registers
t
Figure 16-61: Transmitting Message Buffer Redefinition
i
Data frame
r
Chapter 16 FCAN Controller
User’s Manual U16702EE3V2UD00
CnMCTRLm.CLEAR_RDY = 0
CnMCTRLm.CLEAR_TRQ = 0
CnMCTRLm.CLEAR_RDY = 1
Data frame or remote frame?
CnMCTRLm.SET_RDY = 1
CnMCTRLm.SET_TRQ = 1
CnMCTRLm.SET_RDY = 0
Wait for 1CAN data bits
Transmit abort process
Clear RDY bit
Set RDY bit
Set TRQ bit
Transmit?
l
RDY = 0?
START
END
Yes
Yes
i
No
No
Remote frame
Set CnMDLCm register
Set RTR bit of CnMCONFm
register
Set CnMIDLm and CnMIDHm
registers
L