![NXP Semiconductors PN7462AU Скачать руководство пользователя страница 108](http://html1.mh-extra.com/html/nxp-semiconductors/pn7462au/pn7462au_quick-start-manual_1721878108.webp)
NXP Semiconductors
UM10883
PN7462 family Quick Start Guide - Development Kit
UM10883
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2018. All rights reserved.
User manual
COMPANY PUBLIC
Rev. 1.6 — 14 May 2018
319816
108 of 120
available. In case the NFC device is detected, the application sends a NDEF message
containing the NXP webpage address.
PN7462AU
NFC Reader
PC
Se
ri
al
In
te
rf
ac
e
Fig 98. Door access example
After each polling loop the application goes to standby mode and remains for 500ms. A
timer is used as a wakeup source from standby. This process continues until a card is
detected by the RF field of the reader. If a card is detected, the card type with its UID is
sent via HSU and will be printed on the PC console.
In case a MIFARE Classic card is detected, application tries to authenticate the card
using the default MIFARE key. If the authentication is successful a block of data is read
from the card. The type of the card, UID and data are sent via HSU and printed on the
PC console.
P2P functionality is integrated. When a NFC enabled phone is detected from the RF field
as an active or passive target the LLCP SNEP will be activated and NDEF message will
be sent to the mobile device.
If LPCD (Low Power Card Detection) is enabled, the reader checks during the wakeup
time the presence of a card and enters the card detected mode when a card is present &
repeats the cycle. If no card is present it goes back to standby mode. LPCD is enabled
by default.
Note:
Detailed description and how to use example is described in “Door Access User Manual”.
9.15 PN7462AU_ex_phExDoorAccessEC
This example is related to the 9.14 but in this version the application is using a MIFARE
DESFire EV1 card for the authentication, data exchange is done over contactless
interface and software key store or SAM (Secure Access Module) key store is used for
storing the authentication key. By default, the software key store is enabled. The user
can use the SAM key store by enabling corresponding. SAM is a key storage element
and it should be inserted in the CT main.