Maxim Integrated MAXQ7666 - Manual (Page 147)

MAXQ7665/MAXQ7666 User’s Guide
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4.2.3 CAN Message Center Register Descriptions
The CAN message center registers are located at either the higher order (H) or the lower order (L) byte of the dual port address loca-
tions from 08h to 7Fh. The microcontroller has read/write access to these locations at any time independent of the state of SWINT. All
message centers (y = 1–15) are identical, with the exception of 15, which has some minor differences noted in the register descrip-
tions. To simplify the discussion, only one set of registers is shown, with the generic notation y to denote a message center (y = 1–15).
All the CAN message center register values are indeterminate after a system reset.
All dual port memory locations are accessed by the microcontroller through the CAN 0 data pointer (C0DP) and the CAN 0 data buffer
(C0DB) registers.
CAN 0 Message Center y Arbitration Register 0 (C0MyAR0)
CAN 0 Message Center y Arbitration Register 1 (C0MyAR1)
CAN 0 Message Center y Arbitration Register 2 (C0MyAR2)
Bit # 7 6 5 4 3 2 1 0
Name ID28 ID27 ID26 ID25 ID24 ID23 ID22 ID21
Reset X X X X X X X X
Access rw rw rw rw rw rw rw rw
Dual Port
Address
(8y+1)h(L)
Bit # 7 6 5 4 3 2 1 0
Name ID20 ID19 ID18 ID17 ID16 ID15 ID14 ID13
Reset X X X X X X X X
Access rw rw rw rw rw rw rw rw
Dual Port
Address
(8y+1)h(H)
Bit # 7 6 5 4 3 2 1 0
Name ID12 ID11 ID10 ID9 ID8 ID7 ID6 ID5
Reset X X X X X X X X
Access rw rw rw rw rw rw rw rw
Dual Port
Address
(8y+2)h(L)
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