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参数资料
| 型号： | TSS463A-TERZ |
| 厂商： | Atmel Corp. |
| 英文描述： | VAN Data Link Controller with Serial Interface |
| 中文描述： | 凡数据与串行接口链路控制器 |
| 文件页数： | 14/60页 |
| 文件大小： | 816K |
| 代理商： | TSS463A-TERZ |
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14
TSS463-AA
4205B–AUTO–12/04
VAN Protocol
Line Interface
There are three line inputs and one line output available on the TSS463AA. Which of the
three inputs to use is either programmable by software or automatically selected by a
diagnosis system.
The diagnosis system continuously monitors the data received through the three inputs,
and compares it with each other and the selected bitrate. It then chooses the most reli-
able input according to the results.
The data on the line is encoded according to the VAN standard ISO/11519-3. This
means that the TSS463AA is using a two level signal having a recessive (1) and a dom-
inant (0) state. Furthermore, due to the simple medium used, all data transmitted on the
bus is also received simultaneously.
The VAN protocol is hence a CSMA/CD (Carrier Sense Multiple Access Collision Detec-
tion) protocol, allowing for continuous bitwise arbitration of the bus, and non-destructive
(for the higher priority messa ge) collision detection.
Figure 10.
CSMA/CD Arbritration
In addition to the VAN specification there is also a pulsed coding of the dominant and
recessive states. This mode is intended to be used with an optical or radio link. In this
mode, the dominant state for the transmitter is a low pulse, (2x prescaled clocks at the
beginning of the bit) and the recessive state is just a high level. When receiving in this
mode, it is not the state of the signal itself which is decoded, but the edges. Also, recep-
tion is imposed on the RxD0 input, and the diagnosis system does not operate correctly.
In addition, in this mode there is an internal loopback in the circuit since optical trans-
ceivers are not able to receive the signal that they transmit.
Node a: TxD
Node a loses the arbitration
Node a releases the bus
Node b wins the arbitration
Node c loses the arbitration
Node c releases the bus
R
D
Node b: TxD
R
D
Node c: TxD
R
D
On Bus: DATA
R
D
Arbitration field
R: Recessive Level
D: Dominant Level
1
2
3
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TSS463B | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:Serial VAN Data Link Controller |
| TSS463B_03 | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:Serial VAN Data Link Controller |
| TSS463B_04 | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:VAN Data Link Controller with Serial Interface |
| TSS463B-TERA | 制造商:Temic 功能描述:LAN Node Controller, 16 Pin, SOP |
| TSS463B-TERA-9 | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:VAN Data Link Controller with Serial Interface |
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