DS80C390_00 Datasheet, PDF (121/155 Pages) Dallas Semiconductor – High-Speed Microcontroller User’s Guide Supplement

DS80C390 High-Speed Microcontroller User’s Guide Supplement
CAN MOVX Register Description
Most of the SRAM control registers, including the message centers proper, are mapped into a special
location in the MOVX SRAM space. The specific location of the registers is a function of the module
number (CAN 0 or CAN 1) and the CMA bit which controls whether the CAN SRAM begins at location
401xxxh or 00Exxxh.
The MOVX CAN Registers consist of a set of one Control/Status/Mask register and 15 message centers.
Write access to the Control/Status/Mask registers is only possible when the SWINT bit is set to 1. All
message centers for a given CAN module are identical with the exception of 15, which has some minor
differences noted in the register descriptions. All of the CAN 1 registers are duplicates of the CAN 0
register set, differing only by address. To simplify the documentation, only one set of registers will be
shown, with the following generic notation used for register names and addresses:
n
CAN number (0 or 1)
xxxx
First four hexadecimal digits of register address
CMA
0
1
CAN 0
00EE
4010
CAN 1
00EF
4011
y
Address based on message center number
y Message center number
11
22
..
A 10
F 15
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