參數(shù)資料
型號: MFRC50001T
廠商: NXP Semiconductors N.V.
元件分類: 通信及網(wǎng)絡(luò)
英文描述: Highly integrated ISO-IEC 14443 A reader IC
封裝: MFRC50001T/0FE<SOT287-1 (SO32)|<<http://www.nxp.com/packages/SOT287-1.html<1<week 15, 2005,;
文件頁數(shù): 19/110頁
文件大小: 841K
代理商: MFRC50001T
MFRC500_33
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NXP B.V. 2010. All rights reserved.
Product data sheet
PUBLIC
Rev. 3.3 — 15 March 2010
048033
19 of 110
NXP Semiconductors
MFRC500
Highly Integrated ISO/IEC 14443 A Reader IC
9.5 Timer unit
The timer derives its clock from the 13.56 MHz on-board chip clock. The microprocessor
can use this timer to manage timing-relevant tasks.
The timer unit may be used in one of the following configurations:
Timeout counter
WatchDog counter
Stopwatch
Programmable one shot
Periodical trigger
The timer unit can be used to measure the time interval between two events or to indicate
that a specific timed event occurred. The timer is triggered by events but does not
influence any event (e.g. a time-out during data receiving does not automatically influence
the reception process). Several timer related flags can be set and these flags can be used
to generate an interrupt.
9.5.1
Timer unit implementation
9.5.1.1
Timer unit block diagram
Figure 7
shows the block diagram of the timer module.
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