RFID SYSTEM

• US 20110148594A1
• Filed: 06/02/2010
• Published: 06/23/2011
• Est. Priority Date: 12/23/2009
• Status: Abandoned Application

• Current Assignee: Hynix Semiconductor Incorporated (SK Hynix Inc.)
• Original Assignee: Hynix Semiconductor Incorporated (SK Hynix Inc.)
• Inventors: KANG, Hee Bok
• Application Number:
  US12/792,531
• Publication Number:
  US 20110148594A1
• Time in Patent Office: Days
• US Class Current: 340/10.3
• CPC Class Codes: G06K 19/0723 the record carrier comprising an arrangement for non-contact communication, e.g. wireless communication circuits on transponder cards, non-contact smart cards or RFIDs
• CPC Class Codes: G11C 2216/30 Reduction of number of input/output pins by using a serial interface to transmit or receive addresses or data, i.e. serial access memory
• CPC Class Codes: G11C 5/142 Contactless power supplies, e.g. RF, induction, or IR
• CPC Class Codes: G11C 8/12 Group selection circuits, e.g. for memory block selection, chip selection, array selection

Abstract

An RFID system controls a device using a serial interface protocol through the use of a wireless communication scheme thereof. The RFID system includes: a digital unit configured to control the command signal generated according to a radio signal, and generate an address, data, and a control signal; a memory unit configured to perform a data read or write operation according to the control signal applied from the digital unit; a coupling unit coupled to an external driving device; a decoder configured to decode an output data of the memory unit; and a driving controller configured to sequentially output decoded data of the decoder to the coupling unit in synchronization with a serial clock.

Claims

1. A radio frequency identification (RFID) system comprising:

a digital unit configured to generate an address, data, and a control signal based on a command signal generated from a radio signal;

a memory unit configured to perform a data read or write operation based on the address, the data and the control signal output by the digital unit, the memory unit having a first address area to store first data for transmitting and receiving the radio signal and a second address area to store second data for controlling the driving device;

a coupling unit coupled to an external driving device;

a decoder configured to decode the second data outputted from the memory unit; and

a driving controller configured to sequentially output decoded data of the decoder to the coupling unit in synchronization with a serial clock.

2. The RFID system according to claim 1, further comprising a serial clock generator configured to generate the serial clock.

3. The RFID system according to claim 1, wherein the second data is stored in a serial data format in the second address area.

4. The RFID system according to claim 3, wherein the first address area comprises a nonvolatile ferroelectric memory.

5. The RFID system according to claim 3, wherein the second address area comprises a register configured to store the second data.

6. The RFID system according to claim 5, wherein the second data are sequentially stored in the register according to the radio signal.

7. The RFID system according to claim 5, wherein the second data comprises a serial protocol signal including a slave address, a read component, a write component, and an acknowledge component.

8. The RFID system according to claim 7, wherein the slave address comprises a control component which determines a device type, and a chip select component which expands an address area.

9. The RFID system according to claim 1, further comprising:

a demodulator configured to demodulate the radio signal and generate the command signal;

a modulator configured to modulate a response signal applied from the digital unit, and output the modulated response signal to an antenna;

a power on reset unit configured to generate a power on reset signal to the digital unit; and

a clock generator configured to generate a clock signal to the digital unit.

10. The RFID system according to claim 1, wherein the coupling unit comprises:

a data pad configured to output a serial data outputted from the driving controller to the driving device; and

a clock pad configured to output the serial clock to the driving device.

11. The RFID system according to claim 1, wherein the driving device comprises a device which controls the driving of a light emitting diode (LED) using a serial interface protocol.

12. The RFID system according to claim 3, wherein the digital unit is configured to determine whether the command signal corresponds to the first address area or the second address area, and output the address corresponding to the first address area or the second address area to activate one of the first and second address areas.

13. The RFID system according to claim 1, further comprising:

a power supply voltage pad configured to supply a power supply voltage to an RFID chip; and

a ground voltage pad configured to supply a ground voltage to the RFID chip.