Title:
クロック周波数の変化を利用して非真正スレーブコンポーネントを検出するシステム及び方法。
Document Type and Number:
Japanese Patent JP6654726
Kind Code:
B2
Abstract:
A method for detecting a non-authentic slave component in an electronic device which includes receiving a command from a master component in the device, identifying a response to the command based upon a frequency of a plurality of clock pulses used by the master component while sending the command, and sending the response to the master component for use as a basis in determining whether the slave component is one of an authentic slave component and a non-authentic slave component. The disclosed method may be performed by a replaceable slave component in an imaging device including a slave circuit communicating with a master circuit of the master component along a serial communications interface. The master circuit includes an instruction to change a clock frequency when sending a command to the slave circuit to trigger a unique response from slave circuits of authentic slave components.
Inventors:
Zachary Nathan Pfister
Timothy John Rademacher
Timothy John Rademacher
Application Number:
JP2019074953A
Publication Date:
February 26, 2020
Filing Date:
April 10, 2019
Export Citation:
Assignee:
LEXMARK INTERNATIONAL,INC
International Classes:
G03G21/00; B41J29/00; B41J29/38; G03G15/08; G03G21/18; H04N1/00
Domestic Patent References:
| JP2007212698A | ||||
| JP2010113258A | ||||
| JP2018004705A | ||||
| JP2011028017A | ||||
| JP2000187415A | ||||
| JP9284171A | ||||
| JP2009198563A | ||||
| JP2012247551A |
Foreign References:
| US20070086047 |
Attorney, Agent or Firm:
Kenji Sugimura
Mitsutsugu Sugimura
Kimizuka Emi
Mitsutsugu Sugimura
Kimizuka Emi