參數(shù)資料
型號(hào): MSM9225
廠商: OKI SEMICONDUCTOR CO., LTD.
英文描述: CAN (Controller Area Network) Controller
中文描述: CAN(控制器局域網(wǎng))控制器
文件頁(yè)數(shù): 43/74頁(yè)
文件大小: 488K
代理商: MSM9225
Semiconductor
MSM9225
48/73
(3) Description of each frame
(a) Start-of-frame
Start-of-frame indicates the beginning of a data frame or remote frame and is one dominant
bit.
Start-of-frame
R
D
1 bit
(Interframe space
or bus idle)
(Arbitration field)
The start-of-frame begins when the bus line level changes.
If "dominant" is detected at the sample point, reception continues.
If "recessive" is detected at the sample point, the bus becomes idle.
(b) Arbitration field
This field sets priority and data frame/remote frame protocol modes.
The arbitration field consists of an identifier, RTR bit, and extended format setting bits.
Arbitration field
R
D
RTR
(1 bit)
(Control field)
Identifier
ID28
ID18
IDE
(r1)
(1 bit)
r0
(11 bits)
Standard format mode
Arbitration field
R
D
RTR
(1 bit)
(Control field)
Identifier
ID17
ID0
r1
r0
(18 bits)
Extended format mode
SRR
(1 bit)
IDE
(1 bit)
Identifier
ID28
ID18
(11 bits)
*
Notes:
ID28 to ID0 is the identifier.
The identifier is transmitted MSB first.
It is prohibited to set the identifier = 1111111XXXXX.
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