NXP Semiconductors
UM11038
OM27642 Smart Lock KIT
UM11038
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© NXP B.V. 2018. All rights reserved.
User manual
COMPANY PUBLIC
Rev. 1.1 — 11 October 2018
407611
3 of 38
1. Introduction
This document describes the implementation of a battery-operated Bluetooth
®
Low Energy NFC
Smart Lock for the hospitality market. This document does not replace the PN7462AU or QN9021
datasheets and respective application notes. Please refer to the datasheets for detailed information
of the ICs. This document also describes the process of firmware upgrade for both the PN7462 and
QN9021 (QS9322 module) as well as for the implemented demonstration functionality.
The Smart Lock KIT hardware design consists of two PCBs and incorporate the following
main IC components:
•
PN7462AU
– all-in-one full NFC application controller with freely programmable
µController
(
PN from now on
)
•
QN9020
– for Bluetooth Low Energy communication (
QN from now on
)
•
PCF8883T
– for capacitive wake up of the application processor circuitry
(PN7x62)
•
NX5P2553 -
precision adjustable current-limited power switch
The PN and the QN ICs communicate with each other by means of serial communication
over a UART interface.
Each of the micro-controllers contains its own firmware which performs the required
actions depending on the origin of the unlock token. The token can be delivered to the
lock in two ways:
•
over RFID
– with the help of an MIFARE DESFire ISO14443 Type A
card
or via
an Android based phone using HCE.
•
over Bluetooth Low Energy
– with help of any Bluetooth Low Energy compliant
device
In this document the term „MIFARE DESFire card“ refers to a MIFARE DESFire IC-
based contactless card.