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CLRC663 Datasheet(PDF) 96 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) 96 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
96 of 132
NXP Semiconductors
CLRC663
Contactless reader IC
9.13 Clock configuration
9.13.1 SerialSpeed
This register allows to set speed of the RS232 interface. The default speed is set to
9,6kbit/s. The transmission speed of the interface can be changed by modifying the
entries for BR_T0 and BR_T1. The transfer speed can be calculated by using the
following formulas:
BR_T0 = 0: transfer speed = 27.12 MHz / (BR_T1 + 1)
BR_T0 > 0: transfer speed = 27.12 MHz / (BR_T1 + 33) / 2^(BR_T0
 1)
The framing is implemented with 1 startbit, 8 databits and 1 stop bit. A parity bit is not
used. Transfer speeds above 1228,8 kbit/s are not supported.
Table 164. RxAna bits
Bit
Symbol
Description
7, 6
VMid_r_setl
Factory trim value, needs to be 0
5, 4
RFU
3, 2
rcv_hpcf
The rcv_hpcf [1:0] signals allow 4 different settings of the base band
amplifier lower cut-off frequency from ~40 kHz to ~300 kHz.
1 to 0
rcv_gain
With rcv_gain[1:0] four different gain settings from 30 dB and 60 dB
can be configured (differential output voltage/differential input voltage)
Table 165. Effect of gain and highpass corner register settings
rcv_gain
(Hex.)
rcv_hpcf
(Hex.)
fl (kHz)
fU (MHz)
gain (dB20)
bandwith
(MHz)
03
00
38
2,3
60
2,3
03
01
79
2,4
59
2,3
03
02
150
2,6
58
2,5
03
03
264
2,9
55
2,6
02
00
41
2,3
51
2,3
02
01
83
2,4
50
2,3
02
02
157
2,6
49
2,4
02
03
272
3,0
41
2,7
01
00
42
2,6
43
2,6
01
01
84
2,7
42
2,6
01
02
157
2,9
41
2,7
01
03
273
3,3
39
3,0
00
00
43
2,6
35
2,6
00
01
85
2,7
34
2,6
00
02
159
2,9
33
2,7
00
03
276
3,4
30
3,1


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