CLRC663 Datasheet, PDF (87/132 Pages) NXP Semiconductors – Contactless reader IC

NXP Semiconductors
CLRC663
Contactless reader IC
Table 136. TxCrcPreset bits
Bit
Symbol
Description
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
0h
0000h
00h
1h
6363h
12h
2h
A671h
BFh
3h
FFFEh
FDh
4h
-
-
5h
-
-
6h
User defined
User defined
7h
FFFFh
FFh
CRC5
00h
12h
-
-
-
-
User defined
1Fh
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
Table 138. RxCrcCon register (address 2Dh)
Bit
7
6
5
4
Symbol
RxForceCRCWrite
RXPresetVal
Access
r/w
r/w
rights
3
2
RXCRCtype
r/w
1
RxCRCInvert
r/w
0
RxCRCEn
r/w
Table 139. RxCrcCon bits
Bit
Symbol
Description
7
RxForceCrc If set, the received CRC byte(s) are copied to the FIFO.
Write
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).
CLRC663
Product data sheet
COMPANY PUBLIC
All information provided in this document is subject to legal disclaimers.
Rev. 3.3 — 3 April 2012
171133
© NXP B.V. 2012. All rights reserved.
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