CLRC63201TSLASH0FE datasheet(94/163 Pages) PHILIPS

94 / 163 page

Philips Semiconductors

Product Specification Rev. 3.0; May 2003

Multiple Protocol Contactless Reader IC

CL RC632

Confidential

10.3 Stand By Mode

The Stand By-mode is entered immediately by setting bit StandBy in the Control-Register. All internal current

sinks are switched off (including the internal digital clock buffer but except the oscillator buffer).

Different from the Hard Power Down-Mode, the digital input-buffers are not separated by the input pads and

keep their functionality. The digital output pins do not change their state.

Different from the Soft Power Down-Mode, the oscillator does not need time to wake up.

After resetting bit StandBy in the Control-Register it needs 4 clocks on pin OSCIN until the Stand By-Mode is

left indicated by the StandBy bit itself. Resetting it does not immediately clear it. It is cleared automatically by

the CL RC632 when the Stand By-Mode is left.

10.4 Receiver Power Down

It is power saving to switch off the receiver circuit when it is not needed and switched it on again right before

data is to be received from the card. This is done automatically by setting bit RxAutoPD to 1. If it is set to 0

the receiver is continuously switched on.

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