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CLRC663 Datasheet(PDF) 86 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) 86 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
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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