CLRC632 Datasheet, PDF (109/163 Pages) NXP Semiconductors – Multiple Protocol Contactless Reader IC

Philips Semiconductors
Product Specification Rev. 3.0; May 2003
Multiple Protocol Contactless Reader IC
CL RC632
MIFARE^® : Usage of the MFIN and MFOUT
15.3.1 ACTIVE ANTENNA CONCEPT
The CL RC632 analog circuitry may be used via the pins MFIN and MFOUT. To do so, the following register
settings have to be made:
Register
ModulatorSource
MFOUTSelect
DecoderSource
Value
3
4
X
Signal
Miller Pulse Coded
Manchester Coded with sub-carrier
-
At CL RC632 Pin
MFIN
MFOUT
-
Table 15-4: Register setting to use the CL RC632 analog circuitry only
On the other hand, the CL RC632 digital circuitry may be used via the pins MFIN and MFOUT. To do so, the
following register settings have to be made:
Register
ModulatorSource
MFOUTSelect
DecoderSource
Value
X
2
2
Signal
-
Miller Pulse Coded
Manchester Coded with sub-carrier
At CL RC632 Pin
-
MFOUT
MFIN
Table 15-5: Register setting to use the CL RC632 digital circuitry only
Two CL RC632 devices configured in the above described way may be connected to each other via the pins
MFOUT and MFIN.
Note: The usage of the active antenna concept is only possible with a baudrate of 106kbaud
according to ISO14443A.
15.3.2 DRIVING TWO RF-PARTS
It is possible, to connect a ‘passive antenna’ to pins TX1, TX2 and RX (via the appropriate filter and matching
circuit) and at the same time an Active Antenna to the pins MFOUT and MFIN.
In this configuration, two RF-parts may be driven (one after another) by one µ-Processor.
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