MC68HC912D60A MOTOROLA [Motorola, Inc], MC68HC912D60A Datasheet - Page 327

• Manufacturer Part Number: MC68HC912D60A
• Description: Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

17.12.2 Identifier Registers (IDRn)
MC68HC912D60A — Rev 3.0
MOTOROLA
ADDR
1. x is 4, 5, 6, or 7 depending on which buffer RxFG, Tx0, Tx1, or Tx2 respectively.
$01x0
$01x1
$01x2
$01x3
(1)
REGISTER
IDR0
IDR1
IDR2
IDR3
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
IDE — ID Extended
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.
This flag indicates whether the extended or standard identifier format
is applied in this buffer. In the case of a receive buffer the flag is set
as being received and indicates to the CPU how to process the buffer
identifier registers. In the case of a transmit buffer the flag indicates to
the msCAN12 what type of identifier to send.
Freescale Semiconductor, Inc.
For More Information On This Product,
0 = Standard format (11-bit)
1 = Extended format (29-bit)
R/W
W
W
W
W
R
R
R
R
Go to: www.freescale.com
BIT 7
ID10
ID2
MSCAN Controller
Figure 17-12
ID9
ID1
6
ID8
ID0
5
RTR
ID7
Programmer’s Model of Message Storage
4
IDE(0)
ID6
3
ID5
2
MSCAN Controller
ID4
Technical Data
1
BIT 0
ID3
327