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OM25180FDKM Datasheet(PDF) 78 Page - NXP Semiconductors |
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OM25180FDKM Datasheet(HTML) 78 Page - NXP Semiconductors |
78 / 149 page PN5180 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2016. All rights reserved. Product data sheet COMPANY PUBLIC Rev. 3.0 — 7 October 2016 240930 78 of 149 NXP Semiconductors PN5180 High-performance multi-protocol full NFC Forum-compliant frontend Table 63. Low-Power Card Detection: EEPROM configuration EEPROM address Name Bit value Description 0x34 LPCD_REFERENCE_VALUE - - 2 bytes: bit 9:0 AGC reference value; bit 13:10 AGC gear 0x36 LPCD_FIELD_ON_TIME - - 1 byte: Defines the RF-ON time for the AGC measurement. The minimum RF-ON time depends on the antenna configuration and the connected matching network. It needs to be chosen in such a way that a stable condition for the AGC measurement is given at the end of the time. The byte defines the delay multiplied by 8 in microseconds. 0x37 LPCD_THRESHOLD - - 1 byte: Defines the AGC threshold value. This value is used to compare against the current AGC value during the low-power card detection phase. if the difference between AGC reference value and current AGC value is greater than LPCD_THRESHOLD, the IC wakes up from LPCD. |
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