MC68HC908GZ8 Datasheet, PDF (179/344 Pages) Motorola, Inc – Microcontrollers

Freescale Semiconductor, Inc.
MSCAN08 Controller (MSCAN08)
Programmer’s Model of Message Storage
16.12 Programmer’s Model of Message Storage
This section details the organization 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.
Addr⁽¹⁾
Register Name
$05b0
IDENTIFIER REGISTER 0
$05b1
IDENTIFIER REGISTER 1
$05b2
IDENTIFIER REGISTER 2
$05b3
IDENTIFIER REGISTER 3
$05b4
DATA SEGMENT REGISTER 0
$05b5
DATA SEGMENT REGISTER 1
$05b6
DATA SEGMENT REGISTER 2
$05b7
DATA SEGMENT REGISTER 3
$05b8
DATA SEGMENT REGISTER 4
$05b9
DATA SEGMENT REGISTER 5
$05bA
DATA SEGMENT REGISTER 6
$05bB
DATA SEGMENT REGISTER 7
$05bC
$05bD
DATA LENGTH REGISTER
TRANSMIT BUFFER PRIORITY REGISTER⁽²⁾
$05bE
UNUSED
$05bF
UNUSED
1. Where b equals the following:
b=4 for receive buffer
b=5 for transmit buffer 0
b=6 for transmit buffer 1
b=7 for transmit buffer 2
2. Not applicable for receive buffers
Figure 16-10. Message Buffer Organization
MC68HC908GZ8
MOTOROLA
MSCAN08 Controller (MSCAN08)
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Data Sheet
179