參數(shù)資料
型號(hào)： M34559G6FP
元件分類： 微控制器/微處理器
英文描述： 4-BIT, MROM, 6 MHz, MICROCONTROLLER, PQFP52
封裝： 10 X 10 MM, 0.65 MM PITCH, PLASTIC, LQFP-52
文件頁(yè)數(shù)： 90/93頁(yè)
文件大?。?/td> 1810K
代理商： M34559G6FP
CLRC663
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2011. All rights reserved.
Preliminary data sheet
COMPANY PUBLIC
Rev. 3.1 — 26 September 2011
171131
96 of 126
NXP Semiconductors
CLRC663
Contactless reader IC
14.1.2 Wake-up timer (Timer4)
The wake-up timer can activate the system after a given time. It can start a low power card
detection. For the LPCD it is recommended to set T4AutoWakeUp and T4AutoRestart, to
start the Timer and go to Standby. The internal LPO is used as input clock for this timer. If
a card is detected stop the Timer and start the communication. If T4AutoWakeUp is not
set, the IC will not enter Standby mode in case no card is detected. Refer to Section 16.3
14.1.3 Stop watch
The time TTimer 2 between a certain start- and stop event may be measured by the
-Processor by means of the CLRC663 timer unit. Setting TReloadValue the timer starts
to decrement. If the defined stop event occurs the timers stops. The time between start
and stop can be calculated by
-Processor
(3)
if the timer does not decrements down to zero.
14.1.4 Programmable one-shot timer
The
-Processor starts the timer unit and waits for the timer interrupt. After the specified
time TTimer the interrupt will occur.
14.1.5 Periodical trigger
If the
-Processor sets bit TAutoRestart, it will generate an interrupt request periodically
after every TTimer.
2.
Timer
value
T
Timer
load
T
*
Re
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