Chapter 11 Freescale’s Scalable Controller Area Network (S12MSCANV3)
S12ZVHY/S12ZVHL Family Reference Manual Rev. 1.05
Freescale Semiconductor
451
Module Base + 0x00X2
7
6
5
4
3
2
1
0
R
ID14
ID13
ID12
ID11
ID10
ID9
ID8
ID7
W
Reset:
x
x
x
x
x
x
x
x
Figure 11-28. Identifier Register 2 (IDR2) — Extended Identifier Mapping
Table 11-28. IDR2 Register Field Descriptions — Extended
Field
Description
7-0
ID[14:7]
Extended Format Identifier —
The identifiers consist of 29 bits (ID[28:0]) for the extended format. ID28 is the
most significant bit and is transmitted first on the CAN bus during the arbitration procedure. The priority of an
identifier is defined to be highest for the smallest binary number.
Module Base + 0x00X3
7
6
5
4
3
2
1
0
R
ID6
ID5
ID4
ID3
ID2
ID1
ID0
RTR
W
Reset:
x
x
x
x
x
x
x
x
Figure 11-29. Identifier Register 3 (IDR3) — Extended Identifier Mapping
Table 11-29. IDR3 Register Field Descriptions — Extended
Field
Description
7-1
ID[6:0]
Extended Format Identifier —
The identifiers consist of 29 bits (ID[28:0]) for the extended format. ID28 is the
most significant bit and is transmitted first on the CAN bus during the arbitration procedure. The priority of an
identifier is defined to be highest for the smallest binary number.
0
RTR
Remote Transmission Request
— This flag reflects the status of the remote transmission request bit in the CAN
frame. In the case of a receive buffer, it indicates the status of the received frame and supports the transmission
of an answering frame in software. In the case of a transmit buffer, this flag defines the setting of the RTR bit to
be sent.
0 Data frame
1 Remote frame
