Forum › MIFARE general topics and applications › Best MIFARE Reader chip for battery powered appliations › Reply To: Best MIFARE Reader chip for battery powered appliations
Hi Bosnan,
I had a talk with a reader IC expert. He explained that the MFRC522 has no features for a LPCD. But the MFRC630 allows to implement a LPCD.
For a LPCD the reader will not switch on the field and drive a high current into the antenna. The reader with LPCD check if the antenna field has changed its balanced state. Therefore, a very small current is measured over the time. If a card is moved onto the antenna, it influences the magnetic field and the small current will change. This change is detected by the reader chip. The MFRC630, CLRC663 and the PN5180 have a feature in the reader for detecting this change. But the readers different in its other features. Please check the complete feature list.
The MFRC630 supports ISO/IEC 14443A, MIFARE Classic and NTAG cards. But the CLRC663 supports more protocols and standards like ISO/IEC 14443B and JIS X 6319-4.
I recommend reading:
The MFRC630 datasheet ,
The AN11019 - CLRC663, MFRC630, MFRC631, SLRC610 Antenna Design Guide
AN11145 - CLRC663, MFRC631, MFRC 630, SLRC610 Low Power Card Detection
The TapLinx team
I had a talk with a reader IC expert. He explained that the MFRC522 has no features for a LPCD. But the MFRC630 allows to implement a LPCD.
For a LPCD the reader will not switch on the field and drive a high current into the antenna. The reader with LPCD check if the antenna field has changed its balanced state. Therefore, a very small current is measured over the time. If a card is moved onto the antenna, it influences the magnetic field and the small current will change. This change is detected by the reader chip. The MFRC630, CLRC663 and the PN5180 have a feature in the reader for detecting this change. But the readers different in its other features. Please check the complete feature list.
The MFRC630 supports ISO/IEC 14443A, MIFARE Classic and NTAG cards. But the CLRC663 supports more protocols and standards like ISO/IEC 14443B and JIS X 6319-4.
I recommend reading:
The MFRC630 datasheet ,
The AN11019 - CLRC663, MFRC630, MFRC631, SLRC610 Antenna Design Guide
AN11145 - CLRC663, MFRC631, MFRC 630, SLRC610 Low Power Card Detection
The TapLinx team
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