MC68HC908GZ8 Datasheet, PDF (181/344 Pages) Motorola, Inc – Microcontrollers

MSCAN08 Controller (MSCAN08)
Programmer’s Model of Message Storage
Addr.
$05bA
$05bB
$05bC
Register
Bit 7
6
5
4
3
2
Read:
DSR6 _Write:
DB7
DB6
DB5
DB4
DB3
DB2
Read:
DSR7 _Write:
DB7
DB6
DB5
DB4
DB3
DB2
DLR
Read:
Write:
DLC3
DLC2
= Unimplemented
Figure 16-11. Receive/Transmit Message Buffer
Extended Identifier (IDRn) (Continued)
1
DB1
DB1
DLC1
Bit 0
DB0
DB0
DLC0
Addr.
Register
Bit 7
6
5
4
3
2
1
Bit 0
$05b0
IDR0 ^Read:
ID10
ID9
ID8
ID7
ID6
ID5
ID4
ID3
Write:
$05b1
Read:
IDR1 _Write:
ID2
ID1
ID0
RTR
IDE (=0)
$05b2
IDR2
Read:
Write:
$05b3
IDR3 ^Read:
Write:
= Unimplemented
Figure 16-12. Standard Identifier Mapping
16.12.2 Identifier Registers
The identifiers consist of either 11 bits (ID10–ID0) for the standard, or 29 bits
(ID28–ID0) for the extended format. ID10/28 is the most significant bit and is
transmitted first on the bus during the arbitration procedure. The priority of an
identifier is defined to be highest for the smallest binary number.
SRR — Substitute Remote Request
This fixed recessive bit is used only in extended format. It must be set to 1 by
the user for transmission buffers and will be stored as received on the CAN bus
for receive buffers.
MC68HC908GZ8
Freescale Semiconductor
MSCAN08 Controller (MSCAN08)
Data Sheet
181