NXP Semiconductors PN7462AU - Page 34

NXP Semiconductors
UM10883
PN7462 family Quick Start Guide - Development Kit
UM10883
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User manual
COMPANY PUBLIC
Rev. 1.6 — 14 May 2018
319816
34 of 120
(4) click <Activate Layer4> button
(5) enter 6A and press <Send Data>
The PN7462 NFC Cockpit shows the card responses like ATQA, SAK, and ATS.
Afterwards the ISO/IEC 14443-4 protocol can be used to exchange data. Once the
MIFARE DESFire command “Get Application ID” (0x6A) is sent, the card returns the
AIDs.
Note: Make sure that either the CRC is enabled or added manually in the data field.
(1) 0x6A = Get Application ID command of MIFARE DESFire EV1
Fig 35. NFC Cockpit: activation of a MIFARE DESFire EV1 card + Get Application ID
Similar functionality does exist for ISO/IEC 14443 A and B, for NFC type F, for ISO/IEC
15693 and I-Code ILT communication.
Be aware that a LOAD_RF_CONFIG command must be executed manually before the
corresponding protocol settings are loaded from the EEPROM into the registers. This can
be used to perform
(1) <Load Protocol> (e.g. type A 106)
(2) <Field On>
(3) <Single REQA> (using the EEPROM settings)
(4) Select a TX register, e.g. RF_CONTROL_TX, enable TX_SET_BYPASS_SC_SHAPING
(5) Change some register bits, and write back into RAM
(6) <Single REQA> shows the register changes (probing the field and checking the envelop)
This allows an easy and quick optimization of Tx and Rx parameters before changing the
EERPOM.