CLRC632 Datasheet, PDF (91/163 Pages) NXP Semiconductors – Multiple Protocol Contactless Reader IC

Philips Semiconductors
Multiple Protocol Contactless Reader IC
Product Specification Rev. 3.0; May 2003
CL RC632
9.3.2 STOP WATCH
The time T_Timer between a certain start- and stop event may be measured by the µ-Processor by means of
the CL RC632 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
( ) ∆T = T Reload _value− Timer_value *T_Timer
if the timer does not decrements down to zero.
9.3.3 PROGRAMMABLE ONE-SHOT TIMER
The µ-Processor starts the timer unit and waits for the timer interrupt. After the specified time T_Timer the
interrupt will occur.
9.3.4 PERIODICAL TRIGGER
If the µ-Processor sets bit TAutoRestart, it will generate an interrupt request periodically after every T_Timer.
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