TLE9461ES datasheet(21/140 Pages) INFINEON

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TLE9461ES

Lite CAN SBC Family

System Features

Datasheet

Rev.1.1

2019-09-27

Figure 4

Hardware Configuration Selection Timing Diagram

There are four different device configurations (Table 5) available defining the watchdog failure and the VCC1

over voltage behavior. The configurations can be selected via the external connection on the INTN pin and the

SPI bit CFG1 in the HW_CTRL_0 register (see also Chapter 13.4):

• CFG0_STATE = ‘1’: Config 1 and Config 3:

– A watchdog trigger failure leads to SBC Restart Mode and depending on CFG1 the Fail Output (FO) is

activated after the 1st (Config 1) or 2nd (Config 3) watchdog trigger failure;

– A VCC1 over voltage detection leads to SBC Restart Mode if VCC1_OV_RST is set.

VCC1_ OV is set and the Fail Output is activated;

• CFG0_STATE = ‘0’: Config 2 and Config 4:

– A watchdog trigger failure leads to SBC Fail-Safe Mode and depending on CFG1 the Fail Output (FO) is

activated after the 1st (Config 2) or 2nd (Config 4) watchdog trigger failure. The first watchdog trigger

failure in Config 4 leads to SBC Restart Mode;

– A VCC1 over voltage detection leads to SBC Fail-Safe Mode if VCC1_OV_RST is set.

VCC1_ OV is set and the Fail Output is activated;

The respective device configuration can be identified by reading the SPI bit CFG1 in the HW_CTRL_0 register

and the CFG0_STATE bit in the WK_LVL_STAT register.

Table 5 shows the configurations and the device behavior in case of a watchdog trigger failure:

VCC1

VPOR,r

tRD1

VRT1,r

tCFG_F

Configuration selection monitoring period

Continuous Filtering with

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