TLE9461ES datasheet(83/140 Pages) INFINEON

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TLE9461ES

Lite CAN SBC Family

Supervision Functions

Datasheet

Rev.1.1

2019-09-27

Figure 32 Reset Timing Diagram

12.1.2

Soft Reset Description

In SBC Normal and SBC Stop Mode, it is also possible to trigger a device internal reset via a SPI command in

order to bring the SBC into a defined state in case of failures. In this case the microcontroller must send a SPI

command and set the MODE bits to ‘11’ in the M_S_CTRL register. As soon as this command becomes valid,

the SBC is set back to SBC INIT Mode and all SPI registers are set to their default values (see SPI Chapter 13.5

and Chapter 13.6).

Two different soft reset configurations are possible via the SPI bit SOFT_RESET_RST:

• SOFT_RESET_RST = ‘0’: The reset output (RSTN) is triggered when the soft reset is executed (default

setting, the same reset delay time tRD1 applies)

• SOFT_RESET_RST = ‘1’: The reset output (RSTN) is not triggered when the soft reset is executed

Note:

The device must be in SBC Normal Mode or SBC Stop Mode when sending this command.

Otherwise, the command is ignored.

The reset threshold can be

configured via SPI in SBC

Normal Mode , default is VRT1

tRD1

tLW

SBC Init

RSTN

SPI

VCC1

VRT1

undervoltage

tRDx

SBC Normal

tLW

t < tRF

tRF

tCW

SBC Restart

SBC Normal

SPI

Init

tCW

tOW

Trigger

tCW

tOW

Trigger

SPI

Init

tLW= long open window

tCW= closed window

tOW= open window

tRD1 is the default value at

device power up . The reset

delay time tRDx can be

selected via SPI

VRT1 is the default value at

device power up . The

thresholds VRTx can be

selected via SPI

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