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参数资料
| 型号： | CLRC63201T |
| 厂商： | NXP Semiconductors N.V. |
| 元件分类： | 通信及网络 |
| 英文描述： | Multiple protocol contactless reader IC (MIFARE-I-CODE1) |
| 封装： | CLRC63201T/0FE<SOT287-1 (SO32)|<<http://www.nxp.com/packages/SOT287-1.html<1<week 5, 2005,; |
| 文件页数： | 45/126页 |
| 文件大小： | 719K |
| 代理商： | CLRC63201T |
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CLRC632_35
NXP B.V. 2009. All rights reserved.
Product data sheet
PUBLIC
Rev. 3.5 — 10 November 2009
073935
25 of 126
NXP Semiconductors
CLRC632
Multiple protocol contactless reader IC (MIFARE/I-CODE1)
The timer is started immediately by loading a value from the TimerReload register into the
counter module.
This is activated by one of the following events:
transmission of the rst bit to the card (TxBegin event) with bit TStartTxBegin = logic 1
transmission of the last bit to the card (TxEnd event) with bit TStartTxEnd = logic 1
bit TStartNow is set to logic 1 by the microprocessor
Remark: Every start event reloads the timer from the TimerReload register. Thus, the
timer unit is re-triggered.
The timer can be congured to stop on one of the following events:
receipt of the rst valid bit from the card (RxBegin event) with bit
TStopRxBegin = logic 1
receipt of the last bit from the card (RxEnd event) with bit TStopRxEnd = logic 1
the counter module has decremented down to zero and bit TAutoRestart = logic 0
bit TStopNow is set to logic 1 by the microprocessor.
Loading a new value, e.g. zero, into the TimerReload register or changing the timer unit
while it is counting will not immediately inuence the counter. In both cases, this is
because this register only affects the counter content after a start event.
If the counter is stopped when bit TStopNow is set, no TimerIRq is agged.
9.5.1.3
Timer unit clock and period
The timer unit clock is derived from the 13.56 MHz on-board chip clock using the
programmable divider. Clock selection is made using the TimerClock register
TPreScaler[4:0] bits based on Equation 3:
(3)
The values for the TPreScaler[4:0] bits are between 0 and 21 which results in a minimum
periodic time (TTimerClock) of between 74 ns and 150 ms.
The time period elapsed since the last start event is calculated using Equation 4:
(4)
This results in a minimum time period (tTimer) of between 74 ns and 40 s.
9.5.1.4
Timer unit status
The SecondaryStatus register’s TRunning bit shows the timer’s status. Congured start
events start the timer at the TReloadValue[7:0] and changes the status ag TRunning to
logic 1. Conversely, congured stop events stop the timer and sets the TRunning status
ag to logic 0. As long as status ag TRunning is set to logic 1, the TimerValue register
changes on the next timer unit clock cycle.
The TimerValue[7:0] bits can be read directly from the TimerValue register.
f
TimerClock
1
T
TimerClock
----------------------------
2
TPreScaler
13.56
-------------------------- MHz
]
[
==
t
Timer
TReLoadValue
TimerValue
–
f
TimerClock
----------------------------------------------------------------------------- s
[]
=
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相关代理商/技术参数 |
参数描述 |
|---|---|
| CLRC63201T/0FE | 制造商:NXP Semiconductors 功能描述: |
| CLRC63201T/0FE,112 | 功能描述:RFID应答器 I.CODE HS READER RoHS:否 制造商:Murata 存储容量:512 bit 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体: 封装:Reel |
| CLRC63201T/0FE,118 | 制造商:NXP Semiconductors 功能描述:Interface Misc |
| CLRC63201T/0FE112 | 制造商:NXP Semiconductors 功能描述:CNTCLESS RC 5V ISO14443 + ISO15693 |
| CLRC663 | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Contactless reader IC |
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