mrfc630 lpcd wakeup (mifare card)

[shybora]

i developing using mfrc630 chip and reading coin mifare card. hardware board is complete.

but lpcd value is not constant.  exmple All 10 Samples are different lpcd value.

i used nxp develop board (CLEV6630b v2.0) 

this board is read well mifare card no matter rf on time

questions

1. It mifare card lpcd wakeup distance is influenced by mfrc630 lpcd rf on time ?

2. it mifare card lpcd wakeup distance is influenced by hardware tuning(R/L/C) ? 

else another way? 

thank you.

[Jonathan_Iglesias]

Hi  hwang bora  ,

Hope you are doing great, please check the AN11145,  regarding to your questions: 

1. It mifare card lpcd wakeup distance is influenced by mfrc630 lpcd rf on time ?

The RFon time depends on the antenna design and must be long enough to allow a proper detection.

2. it mifare card lpcd wakeup distance is influenced by hardware tuning(R/L/C) ?

    The LPCD detection range depends on the detuning and loading of the antenna. Normally the standard antenna design is made to minimize the loading and detuning effect as much as possible, but for the LPCD the loading and detuning is required to detect cards.perating distance of the reader.

BR

Jonathan

[shybora]

Thank you 

i reserved.

products have difference characteristics.

all products work self regulation.