| 전자부품 데이터시트 검색엔진 |
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MFRC63002R 데이터시트(PDF) 32 Page - NXP Semiconductors |
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MFRC63002R 데이터시트(HTML) 32 Page - NXP Semiconductors |
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32 / 118 page ![]() MFRC630 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2012. All rights reserved. Product data sheet COMPANY PUBLIC Rev. 3.1 — 6 September 2012 227531 32 of 118 NXP Semiconductors MFRC630 Contactless reader IC The registers Section 9.8 and Section 9.10 control the data rate, the framing during transmission and the setting of the antenna driver to support the requirements at the different specified modes and transfer speeds. Register TXamp and the bits for set_residual_carrier define the modulation index: Table 19. Settings for TX1 and TX2 TxClkMode (binary) Tx1 and TX2 output Remarks 000 High impedance - 001 0 output pulled to 0 in any case 010 1 output pulled to 1 in any case 110 RF high side push open drain, only high side (push) MOS supplied with clock, clock parity defined by invtx; low side MOS is off 101 RF low side pull open drain, only low side (pull) MOS supplied with clock, clock parity defined by invtx; high side MOS is off 111 13.56 MHz clock derived from 27.12 MHz quartz divided by 2 push/pull Operation, clock polarity defined by invtx; setting for 10% modulation Table 20. Setting residual carrier and modulation index by TXamp.set_residual_carrier set_residual_carrier (decimal) residual carrier [%] modulation index [%] 099 0.5 198 1.0 296 2.0 394 3.1 491 4.7 589 5.8 687 7.0 786 7.5 885 8.1 984 8.7 10 83 9.3 11 82 9.9 12 81 10.5 13 80 11.1 14 79 11.7 15 78 12.4 16 77 13.0 17 76 13.6 18 75 14.3 19 74 14.9 20 72 16.3 21 70 17.6 22 68 19.0 |
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