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

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⁾
$05b0
$05b1
$05b2
$05b3
$05b4
$05b5
$05b6
$05b7
$05b8
$05b9
$05bA
$05bB
$05bC
$05bD
$05bE
$05bF
Register Name
IDENTIFIER REGISTER 0
IDENTIFIER REGISTER 1
IDENTIFIER REGISTER 2
IDENTIFIER REGISTER 3
DATA SEGMENT REGISTER 0
DATA SEGMENT REGISTER 1
DATA SEGMENT REGISTER 2
DATA SEGMENT REGISTER 3
DATA SEGMENT REGISTER 4
DATA SEGMENT REGISTER 5
DATA SEGMENT REGISTER 6
DATA SEGMENT REGISTER 7
DATA LENGTH REGISTER
TRANSMIT BUFFER PRIORITY REGISTER⁽²⁾
UNUSED
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
Freescale Semiconductor
MSCAN08 Controller (MSCAN08)
Data Sheet
179