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MFRC53001T/0FE Datasheet(PDF) 21 Page - NXP Semiconductors |
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MFRC53001T/0FE Datasheet(HTML) 21 Page - NXP Semiconductors |
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21 / 116 page ![]() MFRC530_33 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2010. All rights reserved. Product data sheet PUBLIC Rev. 3.3 — 6 July 2010 057433 21 of 115 NXP Semiconductors MFRC530 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 8 shows the block diagram of the timer module. |
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