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CLRC663 Datasheet(PDF) 87 Page - NXP Semiconductors

Part No. CLRC663
Description  Contactless reader IC
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Maker  NXP [NXP Semiconductors]
Homepage  http://www.nxp.com
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CLRC663 Datasheet(HTML) 87 Page - NXP Semiconductors

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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
87 of 132
NXP Semiconductors
CLRC663
Contactless reader IC
Remark: User defined CRC preset values can be configured by EEprom (see
Section 8.7.2.1, Table 34 “Configuration area (Page 0)”).
9.9.2 RxCrcCon
3 to 2
TxCRCtype
Defines which type of CRC (CRC8/CRC16/CRC5) is calculated:
00h -- CRC5
01h -- CRC8
02h -- CRC16
03h -- RFU
1
TxCRCInvert
if set, the resulting CRC is inverted and attached to the data frame
(ISO/IEC 3309)
0
TxCRCEn
if set, a CRC is appended to the data stream
Table 137. Transmitter CRC preset value configuration
TXPresetVal[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 136. TxCrcPreset bits
Bit
Symbol
Description
Table 138. RxCrcCon register (address 2Dh)
Bit
7
6
5
4
3
2
1
0
Symbol
RxForceCRCWrite
RXPresetVal
RXCRCtype
RxCRCInvert
RxCRCEn
Access
rights
r/w
r/w
r/w
r/w
r/w
Table 139. RxCrcCon bits
Bit
Symbol
Description
7
RxForceCrc
Write
If set, the received CRC byte(s) are copied to the FIFO.
If cleared CRC Bytes are only checked, but not copied to the FIFO.
This bit has to be always set in case of a not byte aligned CRC (e.g.
ISO/IEC 18000-3 mode 3/ EPC Class-1HF)
6 to 4
RXPresetVal
Defines the CRC preset value (Hex.) for transmission. (see Table 140).


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