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che
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TLE9012 UM said that in the ring mode  the EMM signal will follow the path that shows the RX interface back to the microcontroller.  If the contiguous device shows a TX interface, the message will not be forwarded.

But I had a question, The EMM signals how to communicate if the chain is not in ring mode and TLE9012 is in normal operation. The contiguous device shows a TX interface, the message will not be forwarded? or the contiguous devies will change the Tx, Rx interface? 

 

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ChandraKachana
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@che 

The EMM feature is intended to be used in case of sleep of the microcontroller. In this case independently of the chain configuration an error condition can be used to wake up the BMS system.

In normal / active mode an EMM signal is lost in PoB / PoT configuration because the communication interface of the device closer to the microcontroller will be in TX mode, hence will block incoming communication. In case of ring mode on the other hand the EMM signal will reach the microcontroller.

But in any case the host controller receives an update of the GEN_DIAG register conditions via the reply frame of the communication. ( An error condition which initiate an EMM will be also displayed in the GEN_DIAG register)

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ChandraKachana
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@che 

Pleased find the below snaps regarding emergency mode in normal mode path (for both PoT & PoB mode configurations) and please refer the "clause 18: Emergency mode (EMM) and ERR pin (ERR)" in the TLE9012DQU datasheet for more details 

ChandraKachana_1-1709715540900.png

 

ChandraKachana_0-1709715351817.png

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che
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@ChandraKachana 

Thanks for reply.

Right, the TLE9012 user manual saids that I mentioned. But it's in the "ring mode" not in the "daisy chain"!

The UM doesn't explain that EMM signal path in the daisy chain.  So I want to confirm that in the daisy chain the EMM signal how to pass to 9015? The UM said that If the contiguous device shows a TX interface, the message will not be forwarded. In the daisy chain the contiguous device is a Tx interface so I confuse the EMM signal path.

 

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ChandraKachana
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In TLE9012 ring mode and daisy chain are same. see below snap for more details regarding different configurations for TLE9012

ChandraKachana_0-1709882887031.png

 

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che
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@ChandraKachana 

"In normal operation the communication mode (PoT or PoB) is already defined and the adjacent device shows
either a TX or RX interface. In case of EMM, the contiguous device showing a TX interface will not forward the
EMM signal. Therefore, the EMM signal follows the path that shows the RX interface back to the microcontroller. "

 

In the ring mode and PoT communication the EMM signal direction south.

In the ring mode and PoB communication the EMM signal direction north.

But in the daisy chain and PoT communication there is no south path. How to communicate or EMM in the normal mode must be with ring mode?

The UM just explain that the normal communication in the normal mode. 

 

Thanks

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che
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Hi expertise,

Have any update?

 

Thanks

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ChandraKachana
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First question asked 25 replies posted 50 sign-ins

@che 

The EMM feature is intended to be used in case of sleep of the microcontroller. In this case independently of the chain configuration an error condition can be used to wake up the BMS system.

In normal / active mode an EMM signal is lost in PoB / PoT configuration because the communication interface of the device closer to the microcontroller will be in TX mode, hence will block incoming communication. In case of ring mode on the other hand the EMM signal will reach the microcontroller.

But in any case the host controller receives an update of the GEN_DIAG register conditions via the reply frame of the communication. ( An error condition which initiate an EMM will be also displayed in the GEN_DIAG register)