C515C_9711 Datasheet, PDF (144/268 Pages) Siemens Semiconductor Group – 8-Bit CMOS Microcontroller

On-Chip Peripheral Components
C515C
6.5.2 CAN Register Description
Notational Conventions
Each CAN register is described with its bit symbols, address, reset value, and a functional
description of each bit or bitfield. Also the access type is indicated for each bit or bitfield :
r : for read access
w : for write access
rw : for read and write access
After reset the CAN registers either contain a defined reset value, keep their previous contents
(UUH), or are undefined (XXH). Locations that are unchanged (UUH) after reset, of course are
undefined (XXH) after a power-on reset operation. The reset values are defined either in hex (with
index _H) or binary (with index _B) expressions.
The notation “n“ in the address definition of the message object registers defines the number of the
related message object (n=1-15).
6.5.2.1 General Registers
The general registers of the CAN controller are located at the external data memory location XX00H
to XX0FH. The registers of this general register block is shown in figure 6-42. The address mapping
of the 15 registers/bytes of a message object is shown in figure 6-43.
Semiconductor Group
6-81
1997-11-01