Freescale Semiconductor, Inc.
MSCAN Controller
17.11 Memory Map
The msCAN12 occupies 128 bytes in the CPU12 memory space. The
background receive buffer can only be read in test mode.
Figure 17-10. msCAN12 Memory Map
$0100
$0108
$0109
$010D
$010E
$010F
$0110
$011F
$0120
$013C
$013D
$013F
$0140
$014F
$0150
$015F
$0160
$016F
$0170
$017F
Control registers
9 bytes
Reserved
5 bytes
Error counters
2 bytes
Identifier filter
16 bytes
Reserved
29 bytes
Port CAN registers
3 bytes
Foreground Receive buffer
Transmit buffer 0
Transmit buffer 1
Transmit buffer 2
17.12 Programmer’s Model of Message Storage
The following section details the organisation of the receive and transmit
message buffers and the associated control registers. For reasons of
programmer interface simplification the receive and transmit message
buffers have the same outline. Each message buffer allocates 16 bytes
in the memory map containing a 13 byte data structure. An additional
transmit buffer priority register (TBPR) is defined for the transmit buffers.
Technical Data
MC68HC912DG128 — Rev 3.0
MSCAN Controller
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