CLRC63201TSLASH0FE datasheet(89/163 Pages) PHILIPS

89 / 163 page

Philips Semiconductors

Product Specification Rev. 3.0; May 2003

Multiple Protocol Contactless Reader IC

CL RC632

Confidential

9.2.4

STATUS OF THE TIMER UNIT

The TRunning bit in the SecondaryStatus Register shows the timer’s current status. Any configured start

event starts the timer at the TReloadValue and changes the status flag TRunning to 1, any configured stop

event stops the timer and sets the status flag TRunning back to 0. As long as status flag TRunning is set to

1, the TimerValue Register changes with the next timer unit clock.

The actual timer unit content can be read directly via the TimerValue Register.

9.2.5

TIMESLOTPERIOD

For sending of I•CODE1-Quit-Frames it is necessary to generat a exact chronological relation to the begin of

the command frame.

Is TimeSlotPeriod > 0, with the end of command transmission the TimeSlotPeriod starst.

If there are Data in the FIFO after reaching the end of TimeSlotPeriod, these data were sent at that moment.

If the FIFO is empty nothing happens.

As long as the contend of TimeSlotPeriod is > 0 the counter for the TimeSlotPeriod will start automatically

after reaching the end.

This allows a exact time relation to the end (as well as to the beginning) of the command frame for the

generation and sending of the I

•CODE1-Quit-Frames

Is TimeSlotPeriod > 0 the next Frame starts exact with the interval

TimeSlotPeriod/CoderRate

delayed after each previous Send Frame. CoderRate defines the clock frequency of the coder.

If TimeSlotPeriod = 0, the send function will not be triggered automatically.

The content of the register TimeSlotPeriod can be changed during the active mode. The modification take

effect at the next restart of the TimeSlotPeriod.

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