TJA1100 Reception is not working

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TJA1100 Reception is not working

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shirly_chrisia
Contributor I

Hi,

In the TJA1100 Datasheet, there is a 100K resistor connected in the TRX_P line as shown below.

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But that 100K Resistor is missing in our Schematic. 

The transmission part is ok. But i am not getting any pulses in the receiver side.

Is this 100K resistor affect the data transmission?

Regards

D. Shirly Chrisia#

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3 Replies

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lisettelozano
NXP Employee
NXP Employee

Hello Shirly,

We do recommend to apply a common mode termination to the twisted-pair lines to avoid a floating behavior on the cable; a split termination consists of two resistors and a capacitor to the signal lines between the DC blocking capacitors and the connector.

Please check the application note AN12088 that provide more details in the connections of the TJA1100 (section 3.4 MDI Interface and section 9 Printed Circuit Board Checklist).

Have a great day,

Paulina

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shirly_chrisia
Contributor I

Hi,

For checking purpose i am using normal wiring within 0.5m. Is it the reason

for the reception failure?

I have checked the loopback methods. Loopback methods working very well.

Regards

D. Shirly Chrisia

Software Developer

PSW - PSI

On Fri, Oct 12, 2018 at 10:08 AM Chrisia , Shirly <

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shirly_chrisia
Contributor I

Hi,

Thanks for the response.

I will look into this and get back to you.

Regards

D. Shirly Chrisia

Software Developer

PSW - PSI

On Thu, Oct 11, 2018 at 10:15 PM lisettelozano <admin@community.nxp.com>

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