Control chip of a card reader and method for detecting interference thereof

A method for detecting interference of a card reader control chip, wherein one or more pins of the control chip are shared between a plurality of memory card read/write interfaces, comprising:

• providing at least one first detection pin of the control chip for detecting if there is a memory card being inserted into one of the memory card read/write interfaces, wherein the first detection pin is coupled to a pin that first contacts with the memory card;
• and
• generating a first interference-acknowledgement signal to inform that a memory card inserted into one of the memory card read/write interfaces is processing data transmission when the control chip detects through the first detection pin that another memory card is being inserted into one of the memory card read/write interfaces.

A method for detecting interference of a card reader control chip, wherein one or more pins of the control chip are shared between a plurality of memory card read/write interfaces, comprising:

• providing at least one second detection pin of the control chip for detecting if there is a memory card being pulled out from one of the memory card read/write interfaces, wherein the second detection pin is coupled to a pin that last contacts with the memory card;
• and
• generating a second interference-acknowledgement signal to inform that a memory card inserted into one of the memory card read/write interfaces is processing data transmission when the control chip detects through the second detection pin that another memory card is being pulled out from one of the read/write interfaces.