mc9s12q128 Freescale Semiconductor, Inc, mc9s12q128 Datasheet - Page 317

• Manufacturer Part Number: mc9s12q128
• Description: Hcs12 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Freescale Semiconductor
Module Base + 0x00X1
Module Base + 0x00X2
ID[20:18]
ID[17:15]
ID[14:7]
Field
Field
SRR
IDE
7:5
2:0
7:0
4
3
Reset:
Reset:
W
W
R
R
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.
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 is stored as received on the CAN bus for receive buffers.
ID Extended — 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 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 MSCAN what type of identifier to send.
0 Standard format (11 bit)
1 Extended format (29 bit)
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.
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.
ID20
ID14
7
x
Figure 10-26. Identifier Register 1 (IDR1) — Extended Identifier Mapping
7
x
Figure 10-27. Identifier Register 2 (IDR2) — Extended Identifier Mapping
Table 10-25. IDR1 Register Field Descriptions — Extended
Table 10-26. IDR2 Register Field Descriptions — Extended
ID19
ID13
6
x
6
x
ID18
ID12
5
x
5
x
MC9S12Q128
Chapter 10 Freescale’s Scalable Controller Area Network (S12MSCANV2)
SRR (=1)
Rev 1.09
ID11
4
x
4
x
Description
Description
IDE (=1)
ID10
x
x
3
3
ID17
ID9
2
x
2
x
ID16
ID8
x
x
1
1
ID15
ID7
0
x
0
x
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