TLE8082ES datasheet(29/61 Pages) INFINEON

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Watchdog

The device implementes a window watchdog with a closed and an open time window serviced by a watchdog

command via SPI.

The watchdog consists of:

•

a watchdog state machine and

•

an error counter

Watchdog

Statemachine

Error

Counter

Operation

Statemachine

NRIO

SCK

CSN

Figure 5

Watchdog function diagram

6.1

Watchdog period

The watchdog period tWD,per consists of a closed window tcw and an open window tow.

tWD,per

tcw

tow

Figure 6

Watchdog period

The watchdog period time tWD,per can be configured to 4 different values by setting the bit WDP in the WD

the bit WDOW in the WD register. The configuration of the watchdog period can be changed together with the

watchdog command.

Table 20

Watchdog period configuration (all values are typical values)

Watchdog period tWD,per

Open window setting

Open window time tow

Closed window time tcw

tWD,per1 = 32 ms

short

tow1,s = 4 ms

28 ms

tWD,per1 = 32 ms

long

tow1,l = 8 ms

24 ms

tWD,per2 = 48 ms

short

tow2,s = 8 ms

40 ms

tWD,per2 = 48 ms

long

tow2,l = 12 ms

36 ms

TLE8082ES

Small engine management IC

Watchdog

Datasheet

Rev. 1.0

2021-03-23

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