564
/
838
Nations Technologies Inc.
Tel
：
+86-755-86309900
：
Address: Nations Tower, #109 Baoshen Road, Hi-tech Park North.
Nanshan District, Shenzhen, 518057, P.R.China
Bit Field
Name
Description
31:21
STDID[10:0]/EXTID[28:18]
Standard identifier or extended identifier
Depending on the content of CAN_RMIx.IDE bits, these bits are either standard
identifiers or high bytes of extended identity.
20:3
EXTID[17:0]
Extended identifier
Low byte of extended identity.
2
IDE
Identifier extension.
This bit determines the type of identifier used for sending messages in the
mailbox.
0: Use standard identifier;
1: Use extended identifiers.
1
RTRQ
Remote transmission request
0: data frame;
1: Remote frame.
0
Reserved
Reserved, the reset value must be maintained.
Receive FIFO mailbox data length and time stamp register(CAN_RMDTx)( x=0..1)
Address offset: 0x1B4, 0x1C4
Reset value: undefined
Notes
: All receiving mailbox registers are read-only.
Bit Field
Name
Description
31:16
MTIM[15:0]
Message time stamp
This field contains the value of the 16-bit timer at the time of sending the
message SOF.
15:8
FMI[7:0]
Filter match index
Here is the filter serial number of the information transfer stored in the mailbox.
For details of identifier filtering, please refer to
20.4.5 section: Identifier filtering.
7:4
Reserved
Reserved, the reset value must be maintained.
3:0
DLC[3:0]
Data length code
This field indicates the data length (0~8) of the received data frame. For remote
frame requests, the data length DLC is always 0.
Receive FIFO mailbox low byte data register(CAN_RMDLx)( x=0..1)
Address offset: 0x1B8, 0x1C8
Reset value: undefined
