S4100 MULTI-FUNCTION READER MODULE

11-06-22-715 10/2003

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MFR READER SYSTEM OVERVIEW

A complete reader system employing the S4100 MFR module consists of the module, an HF (13.56 MHz) section

and/or an LF (134.2 kHz) section, an I/O section, and a power supply. Communication with the circuit is achieved

by means of a three wire serial link (USART). The microprocessor interface provides on-chip data encoding and

recovery, thereby minimizing software design efforts on the part of the user.

The S4100 allows access to the full feature set and onboard data storage of each contactless technology using

high-level and low-level commands available through the onboard USART, or directly coded into application-

specific firmware loaded into the onboard FLASH. The S4100 provides a boot loader that allows standard or

customized firmware to be downloaded via the onboard USART. The ability to execute application-specific

firmware onboard the S4100 offers a mechanism for maximizing RF processing speed while minimizing the total

cost of new contactless applications.

The HF and LF Analog Front Ends (AFE) produce the necessary RF transmit signals for each technology as

driven by the onboard microcontroller. The AFEs also contain the receiver function to filter and demodulate

transponder response signals for further decoding by the microcontroller. The S4100 provides the ability to read

multiple tokens across multiple technologies by polling each technology individually and performing the

anticollision/arbitration required.

Figure 4. A Complete System Diagram Which includes the S4100 Module.