Baseband signal processing SOC chip of multi-protocol UHF RFID reader

Abstract

The invention discloses a baseband signal processing SOC chip of a multi-protocol UHF RFID reader, comprising a CPU module, a bus in a chip, a storage interface, a DAC output channel, an ADC input channel, a multi-protocol processing unit of an UHF RFID hardware, a man-machine interface, a high-speed communication interface, a low-speed communication interface, a timer module, a JTAG interface module and a master clock module; a high-speed system bus and a low-speed peripheral bus are connected together through a DMA controller and a bus bridge, and each bus is provided with an address decoder and a bus arbitrator; the CPU module, the storage interface, the man-machine interface, the multi-protocol processing unit, the JTAG interface module and the high-speed communication interface are connected with the high-speed system bus; and the low-speed communication interface, the timer module and the master clock module are connected with the low speed peripheral bus. The invention can conveniently realize a handheld UHF RFID reader with high integrated level, low cost, low power consumption and high generality.

Description

technical field [0001] The invention relates to a digital baseband signal processing chip for an ultra-high frequency RFID reader-writer, belonging to the technical field of digital baseband signal processing chips. Background technique [0002] Passive ultra-high frequency radio frequency identification UHF RFID system (working frequency range is 860MHz-960MHz) adopts backscatter modulation mode, works in the far-field radiation area, has a long reading and writing distance (up to 3-10 meters), non-visual, reading The characteristics of fast writing speed and passive label make it widely used in warehousing logistics, parking lot management, asset management, valuables anti-theft and other fields. The passive UHF radio frequency identification RFID system consists of readers, electronic tags and background application systems, among which the readers and electronic tags are the key to the whole system. The electronic tag is internally passive and uses passive remote radio ...

AI Technical Summary

Problems solved by technology

The advantage of the CPU+RFID special chip (such as AS3990) solution is that the RFID special chip realizes many functions such as RFID reader baseband processing, RF analog front-end processing, low-level power amplification and gain control, but the user application interface The function still needs to be realized by a separate CPU. Similarly, high-speed communication is required between the CPU and the RFID dedicated chip, and the production cost of the reader is also very high.

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