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TRF7960ARHBT Datasheet(PDF) 10 Page - Texas Instruments |
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TRF7960ARHBT Datasheet(HTML) 10 Page - Texas Instruments |
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10 / 68 page  TRF7960A SLOS732 – JUNE 2011 www.ti.com 4 Application Schematic and Layout Considerations 4.1 TRF7960A Reader System Using Parallel Microcontroller Interface 4.1.1 General Application Considerations Figure 4-1 shows the most flexible TRF7960A application. Both ISO15693 and ISO14443 systems can be addressed. Due to the low clock frequency on the DATA_CLK line, the parallel interface is the most robust way to connect the TRF7960A 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. Note that recursive inventory and anti-collision commands require more RAM than single slotted operations. For example, current reference firmware for ISO15693 (with host interface) is approximately 8kB, using 512B RAM and for all supported protocols (also with same host interface) the reference firmware is approximately 12kB, using a minimum of 1kB RAM. An MCU that is capable of running a GPIO at 13.56 MHz is required for Direct Mode 0 operations with non-standard transponders. 10 Application Schematic and Layout Considerations Copyright © 2011, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): TRF7960A |
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