收藏本站
AN07-00180-3E
5.2.2
Arbitration
CAN employs the multi-master communication system, so any node can start communication. But, the
number of communication sessions actually allowed on one bus is only one. Each node is cyclically
checking whether the bus is the status of transmission. When there is no transmission on the bus,
communication is started, but if more than one node starts transmission, they conflict. Against this, CAN
performs arbitration to give priority to one with a lower ID for transmission. This section describes the
arbitration.
The arbitration is carried out by comparison between the ID and the bus level by bit as shown in “ Figure
5-4 Operation of the arbitration ”. Bit 10 to 7 of Node 1 and Node 2 are the same as the bus level. This
indicates that both Node 1 and Node 2 are transmitting signal s. But, Bit 6 of Node 1 is set to “0” and that
of Node 2 is set to “1”. The bus level is “0”, so Node 2 recognizes that the frame is not of its own
communication and stops the transmission immediately. Node 1 keeps on transmitting. After Node 1 ends
its communication, Node 2 resumes transmission.
Arbitration field
Control field
Node 1
Node 2
Bus level
Node 1 is the same as the bus level, so Node 2 stops
transmission.
Figure 5-4 Operation of the arbitration
The bus status is determined according to the logical product of IDs, so “0” is prior to “1”. This means
that a lower ID takes priority.
A practical communication flow shown in “ Figure 5-5 Example of arbitration among nodes ” is as
described below. First, Node 1 and Node 2 starts transmission simultaneously. The arbitration results in
- 88 -
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
CANADAPT28 KIT ADAPTER CANDEMOBOARD 28PLCC
CAT24AA01WI-GT3 IC EEPROM SERIAL 1KB I2C 8SOIC
CAT24AA02WI-G IC EEPROM SERIAL 2KB I2C 8SOIC
CAT24C01ZI-G IC EEPROM SERIAL 1KB I2C 8MSOP
CAT24C03WI-G IC EEPROM SERIAL 2KB I2C 8SOIC
CAT24C04ZI-G IC EEPROM SERIAL 4KB I2C 8MSOP
CAT24C05YI-G IC EEPROM SERIAL 4KB I2C 8TSSOP
CAT24C08TDI-GT3 8KB I2C SER EEPROM TSOT 23
相关代理商/技术参数
CAN1671-15S 制造商:Techspray 功能描述:TECHSPRAY DUSTER 15 OZ FILL
CAN1747-10S 制造商:Techspray 功能描述:
CAN-24 制造商:Mencom 功能描述:
CAN4311111002451K 制造商:Yageo Corporation 功能描述:ANTENNA BLUETOOTH 2.45GHZ 制造商:Yageo / Phycomp 功能描述:ANTENNA, BLUETOOTH, 2.45GHZ
CAN4311111002701K 制造商:Yageo Corporation 功能描述:
CAN4311112001881K 制造商:Yageo Corporation 功能描述:
CAN4311113011582K 制造商:Yageo Corporation 功能描述:6230 Multilayer Ceramic Chip Antenna 制造商:Yageo Corporation 功能描述:6320 Multilayer Ceramic Chip Antenna
CAN4311115002451K 制造商:Yageo Corporation 功能描述: