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MFRC522 Datasheet(PDF) 62 Page - NXP Semiconductors |
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MFRC522 Datasheet(HTML) 62 Page - NXP Semiconductors |
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62 / 109 page  112132 © NXP B.V. 2007. All rights reserved. Product data sheet Rev. 3.2 — 22 May 2007 62 of 109 NXP Semiconductors MFRC522 Contactless Reader IC The following abbreviations are used: • RF: 13.56 MHz clock derived from 27.12 MHz quartz divided by 2 • RF_n: inverted 13.56 MHz clock • gspmos: Conductance, configuration of the PMOS array • gspmos: Conductance, configuration of the NMOS array • pCW: PMOS conductance value for continuos wave defined by CWGsP register • pMod: PMOS conductance value for modulation defined by ModGsP register • nCW: NMOS conductance value for continuos wave defined by CWGsN register • nMod: NMOS conductance value for modulation defined by ModGsN register Remark: If only 1 driver is switched on, the values for ModGsN, ModGsP and CWGsN, CWGsP are used for both drivers. Table 146: Settings for TX2 TX1RFEn Force 100ASK TX2CW InVTx2 RFON InVTx2 RFOFF Envelope TX2 GSPMos GSNMos Remarks 0 x x xxxxxx not specified if RF is switched off 1000 x 0 RF pMod nMod 1RF pCW nCW 1 X 0 RF_n pMod nMod 1RF_n pCW nCW 1 0 x X RF pCW nCW Gs always CW for TX2CW 1x X RF_n pCW nCW 1 0 0 x 0 0 pMod nMod 100%ASK:Tx2 pulled to 0 (independent of InvTx2RFOn/INVT X2RFOff) 1RF pCW nCW 1 x 0 0 pMod nMod 1RF_n pCW nCW 1 0 x X RF pCW nCW 1x X RF_n pCW nCW |
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