CLRC663 Datasheet, PDF (79/132 Pages) NXP Semiconductors – Contactless reader IC

NXP Semiconductors
CLRC663
Contactless reader IC
Table 98. T2Control bits
Bit
Symbol
Description
7
T2StopRx
If set the timer stops immediately after receiving the first 4 bits. If
cleared indicates, that the timer is not stopped automatically.
Note: If LFO Trimming is selected by T2Start, this bit has no effect
6
-
RFU
5 to 4 T2Start
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
T2AutoRestart Set to logic 1, the timer automatically restarts its countdown from
T2ReloadValue, after the counter value has reached the value zero.
Set to logic 0 the timer decrements to zero and stops. The bit
Timer2IRq is set to logic 1 when the timer underflows
2
-
RFU
1 to 0 T2Clk
00b: The timer input clock is 13.56 MHz.
01b: The timer input clock is 212 kHz.
10b: The timer input clock is an underflow of Timer0
11b: The timer input clock is an underflow of Timer1
9.7.2.11 T2ReloadHi
High byte of the reload value of Timer2.
Table 99. T2ReloadHi register (address 1Ah)
Bit
7
6
5
Symbol
Access
rights
4
3
T2ReloadHi
r/w
2
1
0
Table 100. T2Reload bits
Bit
Symbol
Description
7 to 0
T2ReloadHi
Defines the high byte of the reload value of the Timer2. With the start
event the timer load the value of the T2ReloadValHi and
T2ReloadValLo. Changing this register affects the timer only at the
next start event.
9.7.2.12 T2ReloadLo
Low byte of the reload value of Timer2.
Table 101. T2ReloadLo register (address 1Bh)
Bit
7
6
5
Symbol
Access
rights
4
3
T2ReloadLo
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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