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MCP2518FD 数据表(PDF) 44 Page - Microchip Technology

部件名 MCP2518FD
功能描述  External CAN FD Controller with SPI Interface
PDF  96 Pages
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制造商  MICROCHIP [Microchip Technology]
网页  http://www.microchip.com
标志 MICROCHIP - Microchip Technology

MCP2518FD 数据表(HTML) 44 Page - Microchip Technology

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MCP2518FD
DS20006027A-page 44
 2019 Microchip Technology Inc.
REGISTER 3-22:
CiBDIAG1 – BUS DIAGNOSTICS REGISTER 1
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
U-0
R/W-0
R/W-0
DLCMM
ESI
DCRCERR
DSTUFERR DFORMERR
—
DBIT1ERR
DBIT0ERR
bit 31
bit 24
R/W-0
U-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
TXBOERR
—
NCRCERR
NSTUFERR NFORMERR
NACKERR
NBIT1ERR
NBIT0ERR
bit 23
bit 16
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
EFMSGCNT<15:8>
bit 15
bit 8
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
EFMSGCNT<7:0>
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 31
DLCMM: DLC Mismatch bit
During a transmission or reception, the specified DLC is larger than the PLSIZE of the FIFO element.
bit 30
ESI: ESI flag of a received CAN FD message was set.
bit 29
DCRCERR: Same as for nominal bit rate (see below).
bit 28
DSTUFERR: Same as for nominal bit rate (see below).
bit 27
DFORMERR: Same as for nominal bit rate (see below).
bit 26
Unimplemented: Read as ‘0’
bit 25
DBIT1ERR: Same as for nominal bit rate (see below).
bit 24
DBIT0ERR: Same as for nominal bit rate (see below).
bit 23
TXBOERR: Device went to bus-off (and auto-recovered).
bit 22
Unimplemented: Read as ‘0’
bit 21
NCRCERR: The CRC check sum of a received message was incorrect. The CRC of an incoming
message does not match with the CRC calculated from the received data.
bit 20
NSTUFERR: More than 5 equal bits in a sequence have occurred in a part of a received message
where this is not allowed.
bit 19
NFORMERR: A fixed format part of a received frame has the wrong format.
bit 18
NACKERR: Transmitted message was not acknowledged.
bit 17
NBIT1ERR: During the transmission of a message (with the exception of the arbitration field), the
device wanted to send a recessive level (bit of logical value ‘1’), but the monitored bus value was
dominant.
bit 16
NBIT0ERR: During the transmission of a message (or acknowledge bit, or active error flag, or overload
flag), the device wanted to send a dominant level (data or identifier bit logical value ‘0’), but the
monitored bus value was recessive.
bit 15-0
EFMSGCNT<15:0>: Error Free Message Counter bits



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