CLRC632 Datasheet, PDF (102/163 Pages) NXP Semiconductors – Multiple Protocol Contactless Reader IC

Philips Semiconductors
Multiple Protocol Contactless Reader IC
Product Specification Rev. 3.0; May 2003
CL RC632
13.4 Pulse Width
The envelope carries the information of the data signal that shall be transmitted to the card done by coding
the data signal according to the Miller code. Furthermore, each pause of the Miller coded signal again is
coded as a pulse of certain length. The width of this pulse can be adjusted by means of the ModWidth
Register. The pulse length is calculated by
where f_c = 13.56MHz.
T_Pulse
=
2
ModWidth
f_C
+1
102
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