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nsyed
Level 5
Level 5
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Hello,

I have below question about TLF35584 device functionality. Can you please clarify ?

Item#1: I am trying to create below failure scenario.
1. Apply VBATT/12V to TLF35584
2. Observed that Rest pin of MCU is released by TLF35584 and all power supplies are up and running
3. Creating a MCU stuck fault scenario (This means no SPI communication or watchdog refresh from MCU)
4. Observed that after 600ms TLF35584 pulls reset pin low for 20ms and then releases Reset pin of MCU
5. Again Creating a MCU stuck fault scenario (This means no SPI communication or watchdog refresh from MCU)
6. Observed that after 600ms TLF35585 pulls reset pin low and remains low
After Step#6, If I apply Enable/Key-On the TLF35584 device is not recoverable

Is this behavior correct ?
Question#1.1: In Step#6, based on datasheet I thought TLF35584 will try to reset MCU at-least 3 times, however there is no retry from TLF35584 device ? Am I missing something ?
Question#1.2 In this case why Enable/Key-On is not able to recover TLF35584 device ?
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5 Replies
nsyed
Level 5
Level 5
5 likes given 100 sign-ins 50 sign-ins
Dear Community Members,

Any thoughts on above questions ?
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nsyed
Level 5
Level 5
5 likes given 100 sign-ins 50 sign-ins
Can anyone provide some insight on this behavior of TLF device ?
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ScottW
Employee
Employee
10 sign-ins First solution authored First like received
Hi Nadeem,

On the AURIX side, do you have PORST connected to the TLF35584 reset output? Or ESR0?
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nsyed
Level 5
Level 5
5 likes given 100 sign-ins 50 sign-ins
Scott Winder wrote:
Hi Nadeem,

On the AURIX side, do you have PORST connected to the TLF35584 reset output? Or ESR0?


Hi Scott,

I am using TC377 and in my design, TLF's ROT (Pin 17) is connected to TC377's PORST (G17 pin BGA package)
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MoD
Employee
Employee
50 likes received 500 replies posted 100 solutions authored
How you have connected ENA and WAK? How you make the Enable/Key On?
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