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CLRC663 Datasheet(PDF) 95 Page - NXP Semiconductors |
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CLRC663 Datasheet(HTML) 95 Page - NXP Semiconductors |
95 / 132 page ![]() CLRC663 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2012. All rights reserved. Product data sheet COMPANY PUBLIC Rev. 3.3 — 3 April 2012 171133 95 of 132 NXP Semiconductors CLRC663 Contactless reader IC 9.12.5 Rcv 9.12.6 RxAna This register allows to set the gain (rcv_gain) and high pass corner frequencies (rcv_hpcf). Table 160. RxThreshold bits Bit Symbol Description 7 to 4 MinLevel Defines the MinLevel of the reception. Note: The MinLevel should be higher than the noise level in the system 3 to 0 MinLevelP Defines the MinLevel of the phase shift detector unit Table 161. Rcv register (address 38h) Bit 7 6 5 4 3 2 1 0 Symbol Rcv_Rx_single RFU SigInSel RFU CollLevel Access rights r/w - r/w - r/w Table 162. Rcv bits Bit Symbol Description 7 Rcv_Rx_single Single RXP Input Pin Mode; 0: Fully Differential; 1: Quasi-Differential 6RFU - 5 to 4 SigInSel Defines input for the signal processing unit 0h - idle 1h - internal analog block (RX) 2h - signal in over envelope (ISO/IEC14443A) 3h - signal in over s3c-generic 3 to 2 RFU - 1 to 0 CollLevel Defines the strength of a signal to be interpreted as a collision: 0h - Collision has at least 1/8 of signal strength 1h - Collision has at least 1/4 of signal strength 2h - Collision has at least 1/2 of signal strength 3h - Collision detection is switched off. Table 163. RxAna register (address 39h) Bit 7 6 5 4 3 2 1 0 Symbol VMid_r_sel RFU rcv_hpcf rcv_gain Access rights r/w - r/w r/w |
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