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TLE7250GVIO Datasheet(PDF) 8 Page - Infineon Technologies AG |
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TLE7250GVIO Datasheet(HTML) 8 Page - Infineon Technologies AG |
8 / 23 page Data Sheet 8 Rev. 1.0, 2012-03-14 TLE7250GVIO Functional Description 4.2 Modes of Operation Two different modes of operation are available on the TLE7250GVIO. Each mode has specific characteristics in terms of quiescent current or data transmission. The digital input pin NEN is used for mode selection. Figure 4 illustrates the different mode changes depending on the status of the NEN pin. After supplying V CC and VIO to the HS CAN transceiver, the TLE7250GVIO starts in stand-by mode. The internal pull-up resistor at the NEN pin sets the TLE7250GVIO to stand-by mode by default. If the microcontroller is up and running, the TLE7250GVIO can switch to any mode of operation within the time period for mode change t Mode. Figure 4 Modes of operation The TLE7250GVIO has 2 major modes of operation: • Stand-by mode • Normal-operating mode Table 2 Modes of Operation Mode NEN Bus Bias Comments Normal-operating mode “low” V CC/2 The transmitter is active. The receiver is active. Stand-by “high” GND The transmitter is disabled. The receiver is disabled. V CC off “low” or “high” floating The transmitter is disabled. The receiver is disabled. undervoltage detection on VCC and VIO power-down VCC < VCC(UV) start–up supply VCC and VIO VIO < VIO(UV) NEN = 0 normal-operating mode NEN = 1 stand-by mode NEN = 0 NEN = 1 |
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