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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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MFRC63002R датащи(PDF) 82 Page - NXP Semiconductors |
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MFRC63002R датащи(HTML) 82 Page - NXP Semiconductors |
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82 / 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 82 of 118 NXP Semiconductors MFRC630 Contactless reader IC 9.10 Transmitter configuration registers 9.10.1 TxDataNum 3 to 2 RxCRCtype Defines which type of CRC (CRC8/CRC16/CRC5) is calculated: • 00h -- CRC5 • 01h -- CRC8 • 02h -- CRC16 • 03h -- RFU 1 RxCrcInvert If set, the CRC check is done for the inverted CRC. 0 RxCrcEn If set, the CRC is checked and in case of a wrong CRC an error flag is set. Otherwise the CRC is calculated but the error flag is not modified. Table 132. Receiver CRC preset value configuration RXPresetVal[6...4] CRC16 CRC8 CRC5 0h 0000h 00h 00h 1h 6363h 12h 12h 2h A671h BFh - 3h FFFEh FDh - 4h --- 5h --- 6h User defined User defined User defined 7h FFFFh FFh 1Fh Table 131. RxCrcCon bits Bit Symbol Description Table 133. TxDataNum register (address 2Eh) Bit 7 6 5 4 3 2 1 0 Symbol RFU RFU- RFU- KeepBitGrid DataEn TxLastBits Access rights r/w r/w r/w Table 134. TxDataNum bits Bit Symbol Description 7to5 RFU - 4 KeepBitGrid If set, the time between consecutive transmissions starts is a multiple of the ETU. 3 DataEn If cleared - it is possible to send a single symbol pattern. If set - data is sent. 2 to 0 TxLastBits Defines how many bits of the last data byte to be sent. If set to 000b all bits of the last data byte are sent. Note - bits are skipped at the end of the byte. Example - Data byte B2h (sent LSB first). TxLastBits = 011b (3h) => 010b (LSB first) is sent TxLastBits = 110b (6h) => 010011b (LSB first) is sent |
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