TLE9461ES datasheet(26/140 Pages) INFINEON

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TLE9461ES

Lite CAN SBC Family

System Features

Datasheet

Rev.1.1

2019-09-27

5.1.4

SBC Sleep Mode

The SBC Sleep Mode is the second level technique to reduce the overall current consumption to a minimum

needed to react on wake-up events or for the SBC to perform autonomous actions (e.g. Cyclic Sense). In this

mode, VCC1 is Off, not supplying the microcontroller anymore. The VCC2 supply can be configured to stay

enabled. The settings have to be done before entering SBC Sleep Mode. A wake-up event on CAN, WK/VSENSE,

FO/GPIO (if configured as wake input) and the internal Timer brings the device via the SBC Restart Mode

subsequently to SBC Normal Mode again and signals the wake source.

The configuration options are listed below:

•VCC1 is always Off

• VCC2 is fixed as configured in SBC Normal Mode

• CAN mode changes automatically from On or Receive Only Mode to Wake Capable mode or can be selected

to be Off

• WK/VSENSE pin is fixed as configured in SBC Normal Mode

• Cyclic Sense is fixed as configured in SBC Normal Mode

• Cyclic Wake is fixed as configured in SBC Normal Mode, it can be the only activated wake source

• Watchdog is Off

• The Charge Pump state is fixed as configured in SBC Normal Mode

• FO output is fixed as configured in SBC Normal Mode is maintained

• GPIO is fixed as configured in SBC Normal Mode, it can be the only wake source if configured as WK/VSENSE

• RSTN is pulled low

• SPI communication and all digital I/Os are disabled because VCC1 is Off

• The Sleep Mode entry is signalled in the SPI register DEV_STAT with the bit DEV_STAT

It is not possible to switch Off all wake sources in SBC Sleep Mode. Doing so sets the SPI_FAIL flag and the

device enters SBC Restart Mode.

In order to enter SBC Sleep Mode successfully, all wake source signalization flags from WK_STAT_0 and

WK_STAT_1 need to be cleared. A failure to do so results in an immediate wake-up from SBC Sleep Mode by

going via SBC Restart to Normal Mode.

All settings must be done before entering SBC Sleep Mode.

Note:

If outputs are kept enabled during SBC Sleep Mode, e.g. HS of GPIO, then the SBC current

consumption increases respectively (see Chapter 4.4).

Note:

The Cyclic Sense function might not work properly anymore in case of a failure event (e.g.

overcurrent, over temperature, reset) because the configured HS of the GPIO and Timer might be

disabled.

Note:

When WK/VSENSE and FO/GPIO are configured for the alternative measurement function

(WK_MEAS = 1) then the pins cannot be selected as wake input sources.

TLE9461ES Datasheet(PDF) 26 Page - Infineon Technologies AG

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