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| 型号： | TLE6266G |
| 厂商： | INFINEON TECHNOLOGIES AG |
| 元件分类： | 模拟信号调理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PDSO28 |
| 封装： | 18 MM, PLASTIC, SOP-28 |
| 文件页数： | 4/50页 |
| 文件大小： | 1020K |
| 代理商： | TLE6266G |
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Datasheet TLE 6266 G
Version 2.21
12
July 29th, 2005
6.2
LS CAN Transceiver
The CAN transceiver TLE 6266 works as the interface between the CAN protocol
controller and the physical CAN bus-lines. Figure 4 shows the principle configuration of
a CAN network.
Figure 4
CAN Network Example
In normal operation mode a differential signal is transmitted/received. When bus wiring
failures are detected, the device automatically switches in a dedicated single-wire mode
to maintain communication. While no data is transferred, the power consumption can be
minimized by multiple low power operation modes. Further a receive-only mode is
implemented that allows a separate CAN node diagnosis. During normal and RxD-only
mode, RTL is switched to VCC and RTH to GND. During Vbat stand-by and the cyclic
wake mode, RTL is switched to VS and RTH to GND.
Receive-only Mode
The receive only mode is designed for a special test procedure to check the bus
connections. Figure 5 shows a network consisting of 5 nodes. If the connection between
node 1 and node 3 shall be tested, the nodes 2,4 and 5 are switched into receive only
mode. Node 1 and node 3 are in normal mode. If node 1 sends a message, node 3 is the
only node which can acknowledge the message, the other nodes can only listen but
cannot send an acknowledge bit. If node 1 receives the acknowledge bit from node 3,
the connection is OK.
Electromagnetic Emmision (EME)
To reduce radiated electromagnetic emission (EME), the dynamic slopes of the CANL
and CANH signals are both limited and symmetric. This allows the use of an unshielded
twisted or parallel pair of wires for the bus. During single-wire transmission (one of the
Controller 1
RxD1
BUS Line
Transceiver1
TxD1
Controller 2
RxD2
Transceiver2
TxD2
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