L99LDLH32 datasheet(23/142 Pages) STMICROELECTRONICS

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DS12879 Rev 6

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L99LDLH32

Functional description

141

The device leaves this mode if:



Wake-up pattern is sent through CAN FD Light compatible interface



DIN High for a time t > tWAKEUP

5.1.2

Initialization

The device enters Initialization phase under the following conditions:



Sleep pattern sent through CAN FD Light compatible interface



One frame setting bit (BUSMODE,GOSTBY) = (0,1)



DIN Low for a time t > tSTDBY AND power on reset delay time (tPOR_DELAY) elapsed

AND channels NOT set permanently ON in Fail Safe (FS_OUT_ENx [0])

The Initialization mode characteristics are:



VS > VS_POR_H



V3V3 > V3V3_POR_H



Shadow register(a) loaded from FTP



Outputs disabled



CAN FD Light compatible Interface inactive

The device leaves automatically Initialization mode entering Standby mode after tSTARTUP.

5.1.3

Reset mode

The device enters Reset mode (transition state) under the following conditions:



By default, once the device leaves Standby mode



If device state is in Fail Safe / Stand Alone mode, when V3V3 < V3V3_POR_L



If device state is Normal / Bus mode, when one of the following events occur:

–

Watchdog failure

–

One frame setting bits (BUSMODE,GOSTBY) = (0,0)

–

One frame setting bits (BUSMODE,GOSTBY) = (1,1)

–V3V3 < V3V3_POR_L

The Reset mode characteristics are:



V3V3 > V3V3_POR_H



Reset of control register to default values according to the shadow register setting



CAN FD Light compatible Interface inactive

The device leaves automatically Reset mode and enters Limp Home after 400 ns (typically).

a. Shadow registers are RAM copy of FTP registers, added to speed-up transition between Standby to Fail

Safe modes and Fail Safe to Normal modes.

L99LDLH32 Datasheet(PDF) 23 Page - STMicroelectronics

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