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MAXQ7665/MAXQ7666 User’s Guide

4-17

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 # 76543210

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 # 76543210

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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Maxim-integrated MAXQ7666 Bedienungsanleitung Seite 147