CLRC663 Datasheet, PDF (75/132 Pages) NXP Semiconductors – Contactless reader IC

NXP Semiconductors
CLRC663
Contactless reader IC
Table 78. T0Control bits
Bit
Symbol
Description
7
T0StopRx
If set, the timer stops immediately after receiving the first 4 bits. If
cleared the timer does not stop automatically.
Note: If LFO Trimming is selected by T0Start, this bit has no effect
6
-
RFU
5 to 4 T0Start
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
T0AutoRestart 1: the timer automatically restarts its count-down from T0ReloadValue,
after the counter value has reached the value zero.
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 T0Clk
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 Timer2.
11b: The timer input clock is an underflow of Timer1.
9.7.2.1 T0ReloadHi
High byte reload value of the Timer0.
Table 79. T0ReloadHi register (address 10h);
Bit
7
6
5
Symbol
Access
rights
4
3
T0Reload Hi
r/w
2
1
0
Table 80. T0ReloadHi bits
Bit
Symbol
Description
7 to 0
T0ReloadHi
Defines the high byte of the reload value of the timer. With the start
event the timer loads the value of the registers T0ReloadValHi,
T0ReloadValLo. Changing this register affects the timer only at the
next start event.
9.7.2.2 T0ReloadLo
Low byte reload value of the Timer0.
Table 81.
Bit
Symbol
Access
rights
T0ReloadLo register (address 11h);
7
6
5
4
3
T0ReloadLo
r/w
2
1
0
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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