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 34 / 45
1. The graph shows pass rate versus LMA input level @ Reference PICC
2. With RxGain = 2 the performance is less than optimum.
Figure 29. Rx Matrix Result example with AWG
4.9 PN5180 Low power card detection
The NFC Cockpit allows the configuration and test of the Low Power Card Detection
(LPCD) of the PN5180 as shown in Fig 30.
The LPCD parameter, which are stored in the EEPROM (details refer to [1]), can be
changed and the LPCD can be started.
Note: Disable the test bus, if you do not see the LPCD tab. Then restart the NFC
Cockpit.
The LPCD tab allows to directly define and write the related EEPROM addresses:
LPCD Gear #: Defines the gear number, which is used for the LPCD in autocalibration
mode, stored in adr. 0x34, bit 0..3
Threshold Value: Defines the threshold window. As soon as the AGC value during the
LPCD ping exceeds the AGC reference value + threshold window, the IRQ will be raised
and the PN5180 wakes up.
Field On Time: Defines the ping length in multiple of 8µs + a fix time of 62µs.
Example: 0x10 -> 16 x 8µs + 62 µs = 190µs
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