SLRC400 Datasheet, PDF (93/130 Pages) NXP Semiconductors – I·CODE Reader IC

Philips Semiconductors
I•CODE Reader IC
Product Specification Rev. 2.0 November 2001
SL RC400
15 SERIAL SIGNAL SWITCH
15.1 General
Two main blocks are implemented in the SL RC400. A digital circuitry, comprising state machines, coder and
decoder logic and so on and an analog circuitry with the modulator and antenna drivers, receiver and
amplification circuitry. The interface between these two blocks can be configured in the way, that the
interfacing signals may be routed to the pin SIGOUT.
15.2 Block Diagram
Figure 15-1 describes the serial signal switches. Three different switches are implemented in the serial signal
switch in order to use the SL RC400 in different configurations.
The serial signal switch may also be used during the design In phase or for test purposes to check the
transmitted and received data. Chapter 18.2, describes analog test signals as well as measurements at the
serial signal switch.
Serial Data Out
1 out of 256
or
RZ or
1 out of 4
(Part of)
Serial Data Processing
Serial Data In
Manchester
Decoder
00
1 Internal
2 RFU
3 RFU
2
Decoder
Source
0
0
1
1
Tx1
Envelope
2
Modulator
Driver
Tx2
RFU 3
2
Modulator
Source
(Part of)
Analog Circuitry
Manchester Out ^Subcarrier
Demodulator
Carrier
Demodulator
Rx
Serial Signal Switch
Digital Test Signal
SignalTo
SigOut
SIGOut
Figure 15-1: Serial Signal Switch
The following chapters describe the relevant registers used to configure and control the serial signal switch.
93
Preliminary