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CLRC663 Datasheet(PDF) 77 Page - NXP Semiconductors

Part No. CLRC663
Description  Contactless reader IC
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Maker  NXP [NXP Semiconductors]
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CLRC663 Datasheet(HTML) 77 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
77 of 132
NXP Semiconductors
CLRC663
Contactless reader IC
9.7.2.6
T1ReloadHi
High byte (MSB) reload value of the Timer1.
9.7.2.7
T1ReloadLo
Low byte (LSB) reload value of the Timer1.
Table 88.
T1Control bits
Bit
Symbol
Description
7
T1StopRx
If set, the timer stops after receiving the first 4 bits. If cleared, the timer
is not stopped automatically.
Note: If LFO trimming is selected by T1start, this bit has no effect
6-
RFU
5 to 4
T1Start
00b: The timer is not started automatically
01b: The timer starts automatically at the end of the transmission
10b: Timer is used for LFO trimming without underflow (Start/Stop on
PosEdge)
11b: Timer is used for LFO trimming with underflow (Start/Stop on
PosEdge)
3
T1AutoRestart Set to logic 1, the timer automatically restarts its countdown from
T1ReloadValue, after the counter value has reached the value zero.
Set to logic 0 the timer decrements to zero and stops.
The bit Timer1IRq is set to logic 1 when the timer underflows.
2-
RFU
1 to 0
T1Clk
00b: The timer input clock is 13.56 MHz
01b: The timer input clock is 211,875 kHz.
10b: The timer input clock is an underflow of Timer0
11b: The timer input clock is an underflow of Timer2
Table 89.
T0ReloadHi register (address 15h)
Bit
7
6
5
4
3
2
1
0
Symbol
T1ReloadHi
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Table 90.
T1ReloadHi bits
Bit
Symbol
Description
7 to 0
T1ReloadHi
Defines the high byte reload value of the Timer 1. With the start event
the timer loads the value of the T1ReloadValHi and T1ReloadValLo.
Changing this register affects the Timer only at the next start event.
Table 91.
T1ReloadLo register (address 16h)
Bit
7
6
5
4
3
2
1
0
Symbol
T1ReloadLo
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