MC68HC08AZ32A Datasheet, PDF (348/456 Pages) Motorola, Inc – HCMOS Microcontroller Unit

Freescale Semiconductor, Inc.
MSCAN08 Controller (MSCAN08)
20.13.2 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.
Addr
$05b0
$05b1
$05b2
$05b3
$05b4
$05b5
Register
IDR0
IDR1
IDR2
IDR3
DSR0
DSR1
Read:
Write:
Read:
Write:
Read:
Write:
Read:
Write:
Read:
Write:
Read:
Write:
Bit 7
ID28
ID20
ID14
ID6
DB7
DB7
6
ID27
ID19
ID13
ID5
DB6
DB6
5
ID26
4
ID25
3
ID24
2
ID23
ID18 SRR (=1) IDE (=1) ID17
ID12
ID11
ID10
ID9
ID4
ID3
ID2
ID1
DB5
DB4
DB3
DB2
DB5
DB4
DB3
DB2
1
ID22
ID16
ID8
ID0
DB1
DB1
Bit 0
ID21
ID15
ID7
RTR
DB0
DB0
Figure 20-11. Receive/Transmit Message Buffer Extended Identifier (IDRn) (Sheet 1 of 2)
Technical Data
348
MC68HC08AZ32A — Rev 1.0
MSCAN08 Controller (MSCAN08)
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