CLRC632 Datasheet, PDF (143/163 Pages) NXP Semiconductors – Multiple Protocol Contactless Reader IC

Philips Semiconductors
Product Specification Rev. 3.0; May 2003
Multiple Protocol Contactless Reader IC
CL RC632
21.2.1 TX-CONTROL
The following plot shows as an example an ISO14443 A related communication.
The signal measured at MFOUT using the serial signal switch to control the data sent to the card .Setting the
flag MFOUTSelect to 3 data sent to the card is shown NRZ coded. MFOUTSelect set to 2 shows the Miller
coded signal.
The RFOut signal is measured directly on the antenna showing the pulse shape of the RF signal. For detail
information concerning the pulse of the RF signal please refer to the application note ‘MIFARE® Design of
MF RC 500 Matching Circuits and Antennas’
MFOUTSelect
=3
Serial data
Stream
2V/Div.
MFOUTSelect
=2
Serial data
Stream
2V/Div.
RFout
1V/Div.
Figure 21 TX Control Signals
143
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