CLRC663 Datasheet, PDF (86/132 Pages) NXP Semiconductors – Contactless reader IC

NXP Semiconductors
CLRC663
Contactless reader IC
Table 132. TxCon bits
Bit
Symbol
7 to 4 OvershootT2
3
Cwmax
2
1 to 0
TxInv
TxSel
Description
Specifies the length (number of carrier clocks) of the additional
modulation for overshoot prevention. Refer to Section 8.6.2.1
“Overshoot protection”
Set amplitude of continuous wave carrier to the maximum.
If set, set_cw_amplitude in Register TxAmp has no influence on the
continuous amplitude.
If set, the resulting modulation signal defined by TxSel is inverted
Defines which signal is used as source for modulation
00b ... no modulation
01b ... TxEnvelope
10b ... SigIn
11b ... RFU
9.8.4 Txl
Table 133. Txl register (address 2Bh)
Bit
7
6
5
Symbol
OvershootT1
Access
r/w
rights
4
3
2
1
0
tx_set_iLoad
r/w
Table 134. Txl bits
Bit
Symbol
7 to 4 OvershootT1
3 to 0 tx_set_iLoad
Description
Overshoot value for Timer1. Refer to Section 8.6.2.1 “Overshoot
protection”
Factory trim value, sets the expected Tx load current.
9.9 CRC configuration registers
9.9.1 TxCrcPreset
Table 135. TXCrcPreset register (address 2Ch)
Bit
7
6
5
4
Symbol
RFU
TXPresetVal
Access
-
r/w
rights
3
2
TxCRCtype
r/w
1
TxCRCInvert
r/w
0
TxCRCEn
r/w
Table 136. TxCrcPreset bits
Bit
Symbol
Description
7
RFU
-
6 to 4 TXPresetVal Specifies the CRC preset value for transmission (see Table 137).
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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