SLRC400 Datasheet, PDF (88/130 Pages) NXP Semiconductors – I·CODE Reader IC

Philips Semiconductors
I•CODE Reader IC
Product Specification Rev. 2.0 November 2001
SL RC400
13.4 Pulse Width
The envelope carries the information of the data signal, that shall be transmitted to the label. This is done by
coding the data signal according to the 1 out of 256, RZ or 1 out of 4 code. Furthermore, each pause of the
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
88
Preliminary