NXP Semiconductors
UM10883
PN7462 family Quick Start Guide - Development Kit
UM10883
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© NXP B.V. 2018. All rights reserved.
User manual
COMPANY PUBLIC
Rev. 1.6 — 14 May 2018
319816
80 of 120
•
CLIF Task which executes NFC A, B, F reader application or EMV application and
discovery loop
•
CT Task which does an activation of a JCOP contact card, selects the T=1 protocol
and executes EMV Card application.
In case of non RTOS support one main task is taking control on the application flow.
9.2.4 Operation with standby and without standby
Based on the compile time options, system task is responsible for managing different
operation modes. The application can be in:
•
Standby mode with wakeup timer and CT presence as wakeup configuration.
•
Full power mode with GP Timer1 and CT presence interrupt enabled.
The standby feature can be enabled/disabled at compile time with the precompile
directive. To enable standby mode “#PHFL_ENABLED_STANDBY” directive needs to be
uncomment and can be found in the “
APP_NxpBuild .h
” file.
In this configuration, the FW by default puts the IC to standby and enables the wakeup
sources such as contact card presence, wakeup timer and RF level detector (only for
listen mode). The wakeup timer duration is taken from EE configuration (by default:
300ms). The IC wakes up at every wakeup timer duration and polls for contact card
presence and if not present, polls for contactless technologies (or LPCD).
When a contactless or contact card is detected, the FW executes the corresponding
application and returns back to standby.
In case “Standby” feature is disabled, the FW uses General Purpose Timer 1 as wakeup
timer and CT presence interrupt to either branch to Contactless application or Contact
application respectively.
The below 2 diagrams explain the Standby and Non-Standby scenarios. See Section 7.7
for further reference regarding RTOS.
