DS80C390 Datasheet, PDF (26/58 Pages) Dallas Semiconductor – Dual CAN High-Speed Microprocessor

DS80C390
Each of the message centers is identical with the exception of message center 15. Message center 15 has
been designed as a receive only center and is also buffered through the use of a two message FIFO to help
prevent message loss in a message overrun situation. The receipt of a third message before either of the
first two are read will overwrite the second message, leaving the first message undisturbed.
Modification of the CAN registers located in MOVX memory is protected via the SWINT bits, with one
bit protecting each respective CAN module. Consult the description of this bit in the User’s Guide for
more information. Each CAN Module contains a block of Control/Status/Mask registers, 14 functionally
identical message centers, plus a fifteenth message center which is receive only and incorporates a
buffered FIFO. The following tables describe the organization of the message centers located in MOVX
space.
MOVX MESSAGE CENTERS FOR CAN 0
CAN 0 CONTROL/STATUS/MASK REGISTERS
Register 7
6
5
4
3
2
1
0
C0MID0 MID07 MID06 MID05 MID04 MID03 MID02 MID01 MID00
C0MA0 M0AA7 M0AA6 M0AA5 M0AA4 M0AA3 M0AA2 M0AA1 M0AA0
C0MID1 MID17 MID16 MID15 MID14 MID13 MID12 MID11 MID10
C0MA1 M1AA7 M1AA6 M1AA5 M1AA4 M1AA3 M1AA2 M1AA1 M1AA0
C0BT0 SJW1 SJW0 BPR5 BPR4 BPR3 BPR2 BPR1 BPR0
C0BT1 SMP TSEG26 TSEG25 TSEG24 TSEG13 TSEG12 TSEG11 TSEG10
C0SGM0 ID28 ID27 ID26 ID25 ID24 ID23 ID22 ID21
C0SGM1 ID20 ID19 ID18 0
0
0
0
0
C0EGM0 ID28 ID27 ID26 ID25 ID24 ID23 ID22 ID21
C0EGM1 ID20 ID19 ID18 ID17 ID16 ID15 ID14 ID13
C0EGM2 ID12 ID11 ID10 ID9 ID8 ID7 ID6 ID5
C0EGM3 ID4 ID3 ID2 ID1 ID0
0
0
0
C0M15M0 ID28 ID27 ID26 ID25 ID24 ID23 ID22 ID21
C0M15M1 ID20 ID19 ID18 ID17 ID16 ID15 ID14 ID13
C0M15M2 ID12 ID11 ID10 ID9 ID8 ID7 ID6 ID5
C0M15M3 ID4 ID3 ID2 ID1 ID0
0
0
0
MOVX Data
Address¹
xxxx00h
xxxx01h
xxxx02h
xxxx03h
xxxx04h
xxxx05h
xxxx06h
xxxx07h
xxxx08h
xxxx09h
xxxx0Ah
xxxx0Bh
xxxx0Ch
xxxx0Dh
xxxx0Eh
xxxx0Fh
CAN 0 MESSAGE CENTER 1
Reserved
C0M1AR0
CAN 0 MESSAGE 1 ARBITRATION REGISTER 0
C0M1AR1
CAN 0 MESSAGE 1 ARBITRATION REGISTER 1
C0M1AR2
CAN 0 MESSAGE 1 ARBITRATION REGISTER 2
C0M1AR3
CAN 0 MESSAGE 1 ARBITRATION REGISTER 3
C0M1F DTBYC3 DTBYC2 DTBYC1 DTBYC0 _{T/ R EX/ ST} MEME
C0M1D0-7
CAN 0 MESSAGE 1 DATA BYTES 0 - 7
Reserved
WTOE
MDME
xxxx10h - 11h
xxxx12h
xxxx13h
xxxx14h
xxxx15h
xxxx16h
xxxx17h - 1Eh
xxxx1Fh
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