
CLRC632_35
NXP B.V. 2009. All rights reserved.
Product data sheet
PUBLIC
Rev. 3.5 — 10 November 2009
073935
72 of 126
NXP Semiconductors
CLRC632
Multiple protocol contactless reader IC (MIFARE/I-CODE1)
10.5.6.4
TimerControl register
Selects start and stop conditions for the timer.
10.5.6.5
TimerReload register
Denes the preset value for the timer.
Table 116. TimerControl register (address: 2Bh) reset value: 0000 0110b, 06h bit allocation
Bit
7
6
5
4
3
2
1
0
Symbol
0000
TStopRxEnd
TStopRxBegin
TStartTxEnd TStartTxBegin
Access
R/W
Table 117. TimerControl register bit descriptions
Bit
Symbol
Value
Description
7 to 4 0000
-
these values must not be changed
3
TStopRxEnd
1
the timer automatically stops when data reception ends
0
the timer is not inuenced by this condition
2
TStopRxBegin
1
the timer automatically stops when the rst valid bit is received
0
the timer is not inuenced by this condition
1
TStartTxEnd
1
the timer automatically starts when data transmission ends. If
the timer is already running, the timer restarts by loading
TReloadValue[7:0] into the timer.
0
the timer is not inuenced by this condition
0
TStartTxBegin
1
the timer automatically starts when the rst bit is transmitted. If
the timer is already running, the timer restarts by loading
TReloadValue[7:0] into the timer.
0
the timer is not inuenced by this condition
Table 118. TimerReload register (address: 2Ch) reset value: 0000 1010b, 0Ah bit allocation
Bit
7
6
5
4
3
2
1
0
Symbol
TReloadValue[7:0]
Access
R/W
Table 119. TimerReload register bit descriptions
Bit
Symbol
Description
7 to 0 TReloadValue[7:0]
on a start event, the timer loads the TReloadValue[7:0] value.
Changing this register only affects the timer on the next start event. If
TReloadValue[7:0] is set to logic 0 the timer cannot start.