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參數(shù)資料
| 型號： | TJA1050 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | CAN High-Speed Transceiver(CAN高速收發(fā)器) |
| 中文描述： | CAN高速收發(fā)器（的CAN高速收發(fā)器） |
| 文件頁數(shù)： | 13/31頁 |
| 文件大小： | 254K |
| 代理商： | TJA1050 |
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TJA1050 - CAN High-Speed Transceiver
Application Note
AN00020
Philips Semiconductors
13
"Babbling Idiot" Protection
The silent mode allows setting a node in a state, where it is absolutely passive to the bus. It becomes
necessary when a CAN-controller gets out of control and unintentionally sends messages (“babbling
idiot”), which is claiming the bus. Activating the silent mode by the microcontroller allows releasing the
bus even when there is no direct access from the microcontroller to the CAN-controller any more.
Therefore, the silent mode is very useful in achieving high system reliability required by today′s electronic
applications.
Listen-Only Mode
In silent mode RxD monitors the bus lines as usual. Thus, the silent mode provides a Listen-Only mode
for diagnosis features. It ensures that a node does not influence the bus with dominant bits at all.
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Besides the silent mode, the TJA1050 provides the TxD dominant timeout. This safety feature prevents
an erroneous CAN-controller from clamping the bus to dominant level by a continuously dominant TxD
signal.
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Figure 3.1 TxD dominant timeout feature
The function of the TxD dominant timeout is illustrated in Figure 3.1. After a maximum allowable TxD
dominant time the transmitter will be disabled. The next dominant output drive is possible only after
releasing TxD.
According to the CAN protocol [1], only a maximum of eleven successive dominant bits are allowed on
TxD (worst case of five successive dominant bits followed immediately by an error frame). Along with the
minimum allowable TxD dominant time, this will limit the minimum bit rate to 60kbit/s.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TJA1050T | 制造商:NXP Semiconductors 功能描述: 制造商:NXP Semiconductors 功能描述:LAN Transceiver, Single, 8 Pin, Plastic, SOP |
| TJA1050T/CM,118 | 功能描述:CAN 接口集成電路 RoHS:否 制造商:Texas Instruments 類型:Transceivers 工作電源電壓:5 V 電源電流: 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:SOIC-8 封裝:Tube |
| TJA1050T/H/V,112 | 功能描述:網(wǎng)絡(luò)控制器與處理器 IC CAN 1MBd Silent 5V 8-Pin RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray |
| TJA1050T/H/V,118 | 功能描述:網(wǎng)絡(luò)控制器與處理器 IC CAN 1MBd Silent 5V 8-Pin RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray |
| TJA1050T/N,112 | 功能描述:網(wǎng)絡(luò)控制器與處理器 IC HIGH SPEED CAN TRANSCEIVER RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray |
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