TLE9461ES datasheet(69/140 Pages) INFINEON

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TLE9461ES

Lite CAN SBC Family

High-Voltage Wake and Voltage Monitoring Input

Datasheet

Rev.1.1

2019-09-27

9.2.3

Wake configuration for Cyclic Sense

The wake input pin can also be used for cyclical sensing of monitoring signals during low-power modes. For

this function the WK input performs a cyclic sensing of the voltage level during the On-time of the GPIO HS.

A transition of the voltage level triggers a wake-up event.

In order to enable this functionality the GPIO must be configured as HS to be controlled by the Timer.

See also Chapter 5.2.1 and Chapter 11.1.2 for more details.

9.2.4

High-Voltage Sensing as Alternate Function

This function provides the possibility to measure a voltage, e.g. the unbuffered battery voltage, with the

protected WK HV-input pin. The measured voltage is routed out at FO/GPIO.

If this function is enabled with the WK_MEAS then neither the FO (including the FO test via FO_ON), nor the

GPIO functionality nor the WK functionality are available.

If the measurement function is enabled then following items should be noted:

• The internal pull-up / pull-down structures are disabled and the internal WK signal is gated (blocked)

• The settings for WK in the registers WK_PUPD_CTRL and WK_CTRL_1 are ignored (but changing the

settings is not prevented)

• The wake capability and voltage monitoring of the WK pin is disabled, i.e. WK_STAT_0 and WK_LVL_STAT

are not updated, i.e. the bits in WK_LVL_STAT are cleared

• If WK is the only valid wake source then the SPI_FAIL flag is set when trying to enter SBC Sleep Mode (see

also Chapter 5.1) and SBC Restart Mode is entered

Please refer to Chapter 5.4 for more details on the functionality of the measurement unit.

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