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CLRC663 bảng dữ liệu(PDF) 86 Page - NXP Semiconductors |
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CLRC663 bảng dữ liệu(HTML) 86 Page - NXP Semiconductors |
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86 / 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 86 of 132 NXP Semiconductors CLRC663 Contactless reader IC 9.8.4 Txl 9.9 CRC configuration registers 9.9.1 TxCrcPreset Table 132. TxCon bits Bit Symbol Description 7 to 4 OvershootT2 Specifies the length (number of carrier clocks) of the additional modulation for overshoot prevention. Refer to Section 8.6.2.1 “Overshoot protection” 3 Cwmax Set amplitude of continuous wave carrier to the maximum. If set, set_cw_amplitude in Register TxAmp has no influence on the continuous amplitude. 2 TxInv If set, the resulting modulation signal defined by TxSel is inverted 1 to 0 TxSel Defines which signal is used as source for modulation 00b ... no modulation 01b ... TxEnvelope 10b ... SigIn 11b ... RFU Table 133. Txl register (address 2Bh) Bit 7 6 5 4 3 2 1 0 Symbol OvershootT1 tx_set_iLoad Access rights r/w r/w Table 134. Txl bits Bit Symbol Description 7 to 4 OvershootT1 Overshoot value for Timer1. Refer to Section 8.6.2.1 “Overshoot protection” 3 to 0 tx_set_iLoad Factory trim value, sets the expected Tx load current. Table 135. TXCrcPreset register (address 2Ch) Bit 7 6 5 4 3 2 1 0 Symbol RFU TXPresetVal TxCRCtype TxCRCInvert TxCRCEn Access rights - r/w r/w r/w r/w Table 136. TxCrcPreset bits Bit Symbol Description 7RFU - 6 to 4 TXPresetVal Specifies the CRC preset value for transmission (see Table 137). |
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