s908gz60cfa Freescale Semiconductor, Inc, s908gz60cfa Datasheet - Page 151

• Manufacturer Part Number: s908gz60cfa
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

12.12 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.
Freescale Semiconductor
MC68HC908GZ60 • MC68HC908GZ48 • MC68HC908GZ32 Data Sheet, Rev. 6
Addr
$05bA
$05bB
$05bC
$05bD
$05bE
$05b0
$05b1
$05b2
$05b3
$05b4
$05b5
$05b6
$05b7
$05b8
$05b9
$05bF
1. Where b equals the following:
2. Not applicable for receive buffers
b = 4 for receive buffer
b = 5 for transmit buffer 0
b = 6 for transmit buffer 1
b = 7 for transmit buffer 2
Figure 12-11. Message Buffer Organization
(1)
TRANSMIT BUFFER PRIORITY REGISTER
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
IDENTIFIER REGISTER 0
IDENTIFIER REGISTER 1
IDENTIFIER REGISTER 2
IDENTIFIER REGISTER 3
Register Name
UNUSED
UNUSED
Programmer’s Model of Message Storage
(2)
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