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MC9S08DZ60 Datasheet, PDF (242/396 Pages) Freescale Semiconductor, Inc – Microcontrollers | |||
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Freescaleâs Controller Area Network (S08MSCANV1)
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 12-28. Identiï¬er Register 3 (IDR3) â Extended Identiï¬er Mapping
Field
7:1
ID[6:0]
0
RTR
Table 12-28. IDR3 Register Field Descriptions â Extended
Description
Extended Format Identiï¬er â The identiï¬ers consist of 29 bits (ID[28:0]) for the extended format. ID28 is the
most signiï¬cant bit and is transmitted ï¬rst on the CAN bus during the arbithation procedure. The priority of an
identiï¬er is deï¬ned to be highest for the smallest binary number.
Remote Transmission Request â This ï¬ag reï¬ects 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 ï¬ag deï¬nes the setting of
the RTR bit to be sent.
0 Data frame
1 Remote frame
12.4.2 IDR0âIDR3 for Standard Identiï¬er Mapping
7
6
5
4
3
2
1
0
R
ID10
ID9
ID8
ID7
ID6
ID5
ID4
ID3
W
Reset:
x
x
x
x
x
x
x
x
Figure 12-29. Identiï¬er Register 0 â Standard Mapping
Table 12-29. IDR0 Register Field Descriptions â Standard
Field
7:0
ID[10:3]
Description
Standard Format Identiï¬er â The identiï¬ers consist of 11 bits (ID[10:0]) for the standard format. ID10 is the
most signiï¬cant bit and is transmitted ï¬rst on the CAN bus during the arbitration procedure. The priority of an
identiï¬er is deï¬ned to be highest for the smallest binary number. See also ID bits in Table 12-30.
7
6
5
4
3
2
1
0
R
ID2
ID1
ID0
RTR
IDE(1)
W
Reset:
x
x
x
x
x
x
x
x
1 IDE is 0.
= Unused; always read âxâ
Figure 12-30. Identiï¬er Register 1 â Standard Mapping
MC9S08DZ60 Series Data Sheet, Rev. 1 Draft E
242
PRELIMINARY
Freescale Semiconductor
Subject to Change
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