Clock management unit of RFID tag chip

Abstract

The invention discloses a clock management unit of a RFID (radio frequency identification) tag chip which can reduce power consumption and peak power consumption of the RFID tag chip. The clock management unit of the RFID tag chip comprises a main state machine, a counter and a plurality of gating clock units, wherein the main state machine analyzes the state of each functional unit of the tag chip, judges moments when a plurality of functional units are woken at the same time and a plurality of operations are executed at the same time, and further judges which functional units are still unnecessary, sets a clock enable signal of the functional units which can be stopped to zero, and separates the operations of the plurality of functional units which are independent to each other and enable registers to turn over synchronously; the counter is used for helping control on the input signal, and helping the main state machine to move up some operations of the functional units which are independent to each other and enable registers to turn over synchronously for several clocks and delay some operations of the same for several clocks; the gating clock units are used for instantiating the enable signals and system clock signals of each functional unit, and taking the instantiated output clock as a control clock for controlling the action of each functional unit.

Description

technical field [0001] The invention relates to an RFID tag chip clock management unit, in particular to an RFID tag chip clock management unit capable of controlling and reducing the power consumption and peak power consumption of the RFID tag chip. Background technique [0002] In the process of chip design, with the increase of operating frequency and the expansion of system modules, the increase of the total power consumption of the chip has brought many negative effects, which directly leads to serious heat dissipation problems and greatly limits the improvement of system performance. [0003] The power supply of the RFID tag chip comes from the induction magnetic field continuously provided by the reader. The requirement of low power consumption is more obvious. At the same time, if the peak power consumption is too large, the working voltage of the chip will be lowered instantly, causing the switch tube to flip incorrectly. Even the communication process of RFID is in...

AI Technical Summary

Problems solved by technology

In the RFID tag chip, many modules are triggered at the same time and work at the same time, and each module will have power consumption. The introduction of the gating clock unit has reduced the average power consumption, but the peak power consumption still cannot be reduced.

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