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TLE6251-3G 데이터시트(PDF) 11 Page - Infineon Technologies AG |
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TLE6251-3G 데이터시트(HTML) 11 Page - Infineon Technologies AG |
11 / 36 page TLE6251-3G Operation Modes Data Sheet 11 Rev. 1.1, 2011-06-06 • The low power receiver and the bus Wake-Up function is inactive. • The local Wake-Up pin WK is disabled. • The failure diagnostic is active and local failures are indicated at the NERR pin (see Chapter 8). • The under-voltage detection on the all 3 power supplies V CC, VIO and VS is active. The HS CAN transceiver TLE6251-3G enters Receive-Only mode by setting the EN pin to logical “Low” and the NSTB to logical “High” (see Table 2 or Figure 4). 5.3 Stand-By Mode After the power-up sequence the TLE6251-3G enters automatically into Stand-By mode. Stand-By mode is an idle mode of the TLE6251-3G with optimized power consumption. In Stand-By mode the TLE6251-3G can not send or receive any data. The output driver stage and the normal receiver unit are disabled. Both CAN bus pins, CANH and CANL are connected to GND. The following functions are available in Stand-By mode: • The output stage is disabled. • The normal receiver unit is disabled. • The low power receiver is active and monitors the CAN bus. In case of a message on the CAN bus the TLE6251-3G sets an internal Wake-Up flag. If the power supplies V CC and VIO are active, the Wake-Up event is indicated by the RxD pin and the NERR pin (see Chapter 8). • The local Wake-Up pin is active and a local Wake-Up event is indicated by the RxD and NERR pin, if the power supplies V CC and VIO are active (see Chapter 8). • The INH output is active and set to V S. • Through the internal resistors R I (see Figure 1), the pins CANH and CANL are connected to GND. • If the power supplies V CC and VIO are active, the RxD pin indicates the Wake-Up events. • The TxD pin is disabled • The failure diagnostic is disabled. • The under-voltage detection on the all 3 power supplies V CC, VIO and VS is active. • The TLE6251-3G detects a Power-Up event and indicates it at the NERR pin (see Chapter 8). There are several ways to enter the Stand-By mode (see Figure 4): • After the start-up sequence the device enters per default Stand-By mode. Mode changes are only possible if V CC and VIO are present. • The device is in Sleep mode and a Wake-Up event occurs. • The device is in the Go-To-Sleep command and the EN pin goes low before the time t < t hSLP has expired. • The device is in Normal Operation mode or Receive-Only mode and the EN pin and NSTB pin are set to logical “Low”. • An under-voltage event occurs on the power supply V S. In case of an under-voltage event, the TLE6251-3G device always changes to Stand-By mode regardless in which mode the device currently operates. |
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