CLRC632 Datasheet, PDF (108/163 Pages) NXP Semiconductors – Multiple Protocol Contactless Reader IC

Philips Semiconductors
Multiple Protocol Contactless Reader IC
Product Specification Rev. 3.0; May 2003
CL RC632
test possibilities for the SL RC 400 using the pin MFOUT.
The following chapters describe the relevant registers used to configure and control the serial signal switch.
15.3 Registers Relevant for the Serial Signal Switch
The flags DecoderSource define the input signal for the internal Manchester decoder in the following way:
DecoderSource
0
1
2
3
Input Signal for Decoder
Constant 0
Output of the analog part. This is the default configuration.
Direct connection to MFIN, expecting an 847.5 kHz sub-carrier signal modulated
by a Manchester coded signal.
Direct connection to MFIN, expecting a Manchester coded signal.
Table 15-1: Values for DecoderSource
ModulatorSource defines the signal that modulates the transmitted 13.56 MHz energy carrier. The modulated
signal drives the pins TX1 and TX2.
ModulatorSource
0
1
2
3
Input Signal for Modulator
Constant 0 (energy carrier off at pin TX1 and TX2).
Constant 1 (continuous energy carrier delivered at pin TX1 and TX2).
Modulation signal (envelope) from the internal coder. This is the default
configuration.
Direct connection to MFIN, expecting a Miller pulse coded signal.
Table 15-2: Values for ModulatorSource
MFOUTSelect selects the output signal, which is routed to the pin MFOUT.
MFOUTSelect
0
1
2
3
4
5
6
7
Signal Routed to Pin MFOUT
Constant Low
Constant High
Modulation signal (envelope) from the internal coder.
Serial data stream that is to be transmitted
(same as for MFOUTSelect = 2, but not coded by the selected pulse coder yet).
Output signal of the receiver circuit (card modulation signal regenerated
and delayed)
Output signal of the subcarrier demodulator (Manchester-coded card signal)
RFU
RFU
able 15-3: Values for MFOUTSelect
To use MFOUTSelect, the value of test signal control bit SignalToMFOUT has to be 0.
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