SLRC400 datasheet(80/130 Pages) PHILIPS

80 / 130 page

Philips Semiconductors

Product Specification Rev. 2.0 November 2001

•CODE Reader IC

SL RC400

Preliminary

10.3

Stand By Mode

This mode is immediately entered 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 from the input pads but

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. This is indicated by the StandBy bit itself. Resetting it does not immediately clear it, but it is cleared

automatically by the SL RC400 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 label. This is done automatically by setting bit RxAutoPD to 1. If it is set to 0

the receiver is continuously switched on.

SLRC400 Datasheet(PDF) 80 Page - NXP Semiconductors