TRF7963A datasheet(10/62 Pages) TI

Part #	TRF7963A

Description	FULLY INTEGRATED 13.56-MHz RFID READER/WRITER IC FOR ISO14443A,B/NFC STANDARDS

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TRF7963A

SLOS758

– DECEMBER 2011

www.ti.com

4

Application Schematic and Layout Considerations

4.1

TRF7963A Reader System Using Parallel Microcontroller Interface

4.1.1

General Application Considerations

Figure 4-1 shows the most flexible TRF7963A application. Due to the low clock frequency on the

DATA_CLK line, the parallel interface is the most robust way to connect the TRF7963A with the MCU.

This schematic shows matching to a 50-

Ω port, which allows connection to a properly matched 50-Ω

antenna circuit or RF measurement equipment (for example, a spectrum analyzer or power meter).

4.1.2

Schematic

Figure 4-1 shows a sample application schematic with a parallel interface to the MCU.

Figure 4-1. Application Schematic, Parallel MCU Interface

The MSP430F2370 (32kB flash, 2kB RAM) is shown in Figure 4-1. Minimum MCU requirements depend

on application requirements and coding style. If only one ISO protocol and/or a limited command set of a

protocol must be supported, MCU flash and RAM requirements can be significantly reduced. For example,

current reference firmware for ISO14443A/B (with host interface) is approximately 8kB, using 1kB RAM.

An MCU that is capable of running a GPIO at 13.56 MHz is required for Direct Mode 0 operations with

nonstandard transponders.

10

Application Schematic and Layout Considerations

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