PN7462 family Quick Start Guide - Development Kit
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© NXP B.V. 2018. All rights reserved.
User manual
COMPANY PUBLIC
Rev. 1.6 — 14 May 2018
319816
(1) Example: Running in an endless loop for Type A @ 106 settings
Fig 40. PN7462 family IC AWC
6.9.1 Proposal for “static” Tx shaping adjustment
Step1: Save EEPROM for backup (<Dump EEPROM>), then disable the AWC (<Disable
AWC>).
Step2: Operate the antenna in gear 0 (“unloaded”): <Load Protocol> (for e.g. Type A
106) and enable RF field (<RF Field On>).
Step 3: <Start Endless> and watch the current gear: must be 0!
Step 4: Check the pulse shape with a Reference PICC and an oscilloscope. Move the
sliders <TAU MOD FALLING>, <TAU MOD RISING> and <TX RESIDUAL CARRIER> to
optimize the shaping.
Step 5: Note down the optimum settings and save the corresponding register settings
into the EEPROM (Read RF_CONTROL_TX register and write the value back into the
required EEPROM (e.g. TX ISO14443A 106).
Step 6: <Stop Endless>
Step 7: <Load Protocol> (with the same protocol, e.g. Type A 106) and then send single
or endless REQA. Check the wave shape in gear 0 position.
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