NXP Semiconductors
AN11744
PN5180 Evaluation board quick start guide
AN11744 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2018. All rights reserved.
Application note Rev. 1.3 — 2 February 2018
COMPANY PUBLIC 371213 23 / 45
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.
4.5.2 Proposal for “dynamic” Tx shaping adjustment
Requirement: “static” TX shaping adjustment is done properly.
Step1: Save EEPROM for backup (<Dump EEPROM>), then disable the AWC (<Disable
AWC>), if not done before.
Step2: Start 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: Must be ok.
Step 5: Load the antenna, until the gear changes to the next higher one. Move the
sliders <TAU MOD FALLING>, <TAU MOD RISING> and <TX RESIDUAL CARRIER> to
optimize the shaping.
Step 6: <Safe Configuration> -> This stores the AWC settings into the NFC Cockpit table.
The PN5180 EEPROM is not changed at all.
Step 7: Continue with Step 5, until the last gear is reached.
Step 8: <Stop Endless>
Step 9: <Write AWC Data to EEPROM> -> This writes the new AWC data into the look
up table in the PN5180 EEPROM.
Step 10: <Load Protocol> (with the same protocol, e.g. Type A 106) and then send single
or endless REQA. Check the wave shape in all gear positions.
4.6 PN5180 analog and digital test signals
The NFC cockpit allows to route analog and digital test signals to test pins of the
PN5180, if the PN5180 internal test bus is enabled (see Fig 22).
Enabling the test bus changes the EEPROM adr. 0x17 (refer to TESTBUS_ENABLE, see
[1]).
Enabling the test bus changes the communication between PN5180 and LPC, since
the IRQ pin is used for test signals, and therefore cannot be used as IRQ pin anymore.
Therefore, the communication changes into a polling mode: This automatically disables
the LPCD functionality.
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