TLE9271QX datasheet(21/126 Pages) INFINEON

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TLE9271QX

System Features

Datasheet

Rev.1.5

2019-09-27

No watchdog trigger during the long open window, will cause a watchdog failure and the device will enter in

SBC Restart Mode as shown in Table 5 and one reset event is generated.

In case of 3 consecutive reset events due to WD failures, it is possible not to generate additional reset by

setting the MAX_3_RST on WD_CTRL and the SBC will remain in SBC Normal or Stop Mode (SBC Restart Mode

not entered anymore). If the MAX_3_RST is set to 0, one reset event is generated for each missing watchdog

trigger.

Wake-up events are ignored during SBC Init Mode and will therefore be lost.

Note: Any SPI command will bring the SBC to SBC Normal Mode even if it is an illegal SPI command (see

Chapter 14.2)

Note: For a safe start-up, it is recommended to use the first SPI commands to trigger and to configure the

watchdog

Note: At power up no VCC1_UV will be issued nor will the FOx be triggered as long as VCC1 is below VRT1,r

threshold and below the VS threshold for VS under voltage time out VS,UV_TO. The RO pin will be kept low

as long as VCC1 is below the selected VRT1,r threshold. When VCC1 is above the VRT1,r threshold, the RO is

released after tRD1 (Reset Delay Time).

5.1.2

SBC Normal Mode

The SBC Normal Mode is the standard operating Mode for the SBC. All configurations have to be done in SBC

Normal Mode before entering a low-power mode. A wake-up event on CAN, LIN1, LIN2 and WK will create an

interrupt on pin INT however, no changes of SBC Mode will occur. The configuration options are listed below:

• VCC1 is active (Buck regulator in PWM Mode)

• Boost Regulator can be configured and enabled or disabled. The module will start to work as soon as the

VS value is dropping below the selected threshold. For additional information, refer to Chapter 6.3.

• VCC2 can be switched ON or OFF (default off)

• CAN is configurable (OFF coming from SBC Init Mode; OFF or wake capable coming from SBC Restart Mode,

TLE9271QX Datasheet(PDF) 21 Page - Infineon Technologies AG