TLE9263QX datasheet(23/164 Pages) INFINEON

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TLE9263QX

System Features

Data Sheet

Rev. 1.1, 2014-09-26

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 INT pin and the SPI bit

CFG in the HW_CTRL register (see also Chapter 16.4):

•

CFGP = ‘1’: Config 1 and Config 3:

– A watchdog trigger failure leads to SBC Restart Mode and depending on CFG the Fail Outputs (FOx) are

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

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

VCC1_ OV will be set and the Fail Outputs are activated;

•

CFGP = ‘0’: Config 2 and Config 4:

– A watchdog trigger failure leads to SBC Fail-Safe Mode and depending on CFG the Fail Outputs (FOx) are

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

in Config 4 will lead to SBC Restart Mode;

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

VCC1_ OV will be set and the Fail Outputs are activated;

The respective device configuration can be identified by reading the SPI bit CFG in the HW_CTRL register and

the CFGP bit in the WK_LVL_STAT register.

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

Table 6 shows the configurations and the device behavior in case of a VCC1 over voltage detection when

VCC1_OV_RST is set:

The respective configuration will be stored for all conditions and can only be changed by powering down the device

(VS < VPOR,f).

Table 5

Watchdog Trigger Failure Configuration

Config INT Pin (CFGP)SPI Bit CFG Event

FOx Activation

SBC Mode Entry

External pull-up

1 x Watchdog Failure

after 1st WD Failure

SBC Restart Mode

No ext. pull-up

1 x Watchdog Failure

after 1st WD Failure

SBC Fail-Safe Mode

External pull-up

2 x Watchdog Failure

after 2nd WD Failure

SBC Restart Mode

No ext. pull-up

2 x Watchdog Failure

after 2nd WD Failure

SBC Fail-Safe Mode

Table 6

Device Behavior in Case of VCC1 Over Voltage Detection

Config INT Pin

(CFGP)

CFG Bit VCC1_O

V_RST

Event

VCC1

_ OV

FOx Activation

SBC Mode Entry

1-4

any value

1 x VCC1 OV 1

no FOx activation

unchanged

External pull-up 1

1 x VCC1 OV 1

after 1st VCC1 OV SBC Restart Mode

No ext. pull-up

1 x VCC1 OV 1

after 1st VCC1 OV SBC Fail-Safe Mode

External pull-up 0

1 x VCC1 OV 1

after 1st VCC1 OV SBC Restart Mode

No ext. pull-up

1 x VCC1 OV 1

after 1st VCC1 OV SBC Fail-Safe Mode

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