Joined: 1 February 2006
Location: CH
Posts: 109

Back to Top

Hello,

In the +5Volts power booster application the internal signal MOD routed out to the pin RES2 corresponds to the modulation signal independently if you are using the MLX90121 in direct mode or with the internal symbol encoder.

To routed out the MOD signal, the following register configuration should be programmed: PowerState[6:3] = "1110".

Best regards
denis

Joined: 1 February 2006
Location: CH
Posts: 109

Back to Top

Hello,
It is not recommended to use several power supplies for the MLX90121. This may disrupt the internal digital communication and the functionnality of the device will not be guaranteed.

Best regards
denis

Joined: 6 April 2006
Location: IN
Posts: 6

Back to Top

My company is interested in building a prototype RFID reader based on ISO 15693 protocol. Are any detailed datasheets avilable?

Joined: 1 January 2005
Location: CH
Posts: 81

Back to Top

Hello,

The MLX90121 support ISO15693. Why don't you have a look to the datasheet ? http://www.melexis.com/ProdMain.aspx?nID=78.

Patrick

Joined: 6 April 2006
Location: IN
Posts: 6

Back to Top

Hi

I have already gone throu the document above mentioned. It would be quite helpful if any document showing examples of the commands from thr MCU to the reader IC were available for ISO 15693.

Sameer

Joined: 6 April 2006
Location: IN
Posts: 6

Back to Top

Hi

Along with the above enquiry I would also like know if manchester encoded signal sent by the tag is decoded by the reader hardware or is there a need to implement a decoder

Sam

Joined: 6 April 2006
Location: IN
Posts: 6

Back to Top

Hi 1)There is no manchester decoder block in the MLX90121. Does the MCU needs to decode it? 2)What is the read range expected from the antenna circuit given in the data sheet? My requirement is 1meter please advice how to achieve it?

Joined: 1 January 2005
Location: CH
Posts: 81

Back to Top

Hi Sam,

Thnaks for your interest in our products.

Whenever you buy the DVK90121, you get access to the drivers of the MLX9121 (but they are MCU dependant). It is also possible to get access to the ISO protocol source code. Please contact us directly (plb@melexis.com) for further information.

On your last topic, the manschester decoding has to be done by the MCU.

Patrick

Joined: 1 January 2005
Location: CH
Posts: 81

Back to Top

Sam,

The manchester decoding has to be handled by the MCU.

What we have experimented in our lab, for the ISO15693 protocol, is a reading distance > 20cm. With the external power booster, one can reach > 30cm.

More than this seems difficult as a first glance unless you use an external power booster associated with a - very - large antenna.

Patrick

Joined: 14 June 2006
Location:
Posts: 3

Back to Top

In case of 15693 protocol, when Symbol transmission, what is the condition to generated DSYNC signal. In my case, after assert MODE high and RTB low, transmit SOF with CK However I don’t see the DSYNC signal I want to the condition that DSYNC signal is generated in Symbol transmission and MV reception