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OM25180FDKM Datasheet(PDF) 76 Page - NXP Semiconductors |
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OM25180FDKM Datasheet(HTML) 76 Page - NXP Semiconductors |
76 / 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 76 of 149 NXP Semiconductors PN5180 High-performance multi-protocol full NFC Forum-compliant frontend Before entering the LPCD mode, an LPCD reference value needs to be determined. Three options do exist for generating this reference value. The LPCD works in two phases: Fig 39. LPCD configuration aaa-020634 Wakeup_counter > 0x3FF Set wakeup_counter = 0x3FF LoadRF config Tx: A106 Rx: A106 yes Boot Reason Any other Standby Mode left | Reference_value-actual_AGC| > LPCD_THRESHOLD FW command LP CD no no yes LPCD_GPO_REFVAL _CONTROL[1:0] == 10 LPCD_GPO_REFVAL _CONTROL[1:0] == 00 LPCD_GPO_REFVAL _CONTROL[1:0] == 01 Reference_value == LPCD_REFERENCE_ VALUE (EEProm@0x34) Reference_value == AGC_REF_CONFIG (register@0x26) Enter Standby with Wakeup from Wakeup Counter Wakeup counter Function Call RF_CHECKCARD(AGCRefVal=0) AutoCalibration - Measures the actual AGC value&Gear and use this as a reference Function Call RF_CHECKCARD(AGCRefVal == Reference_value) Switch on RF field and measure AGC SET IDLE_IRQ end state SET LPCD_IRQ end state |
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