SD card interface circuit and electronic product with electrostatic protection function

• Main Author: LUO YINGCHUN
• Format: Patent
• Language: English
• Published: 07.10.2015
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; PHYSICS

The utility model relates to an interface protection technique discloses a SD card interface circuit and electronic product with electrostatic protection function. Clock signal end, command signal end, data signal end and TF card detected signal through the draw -in groove at the SD card are served and are respectively set up a magnetic bead, and the high frequency noise and peak interference that can the inhibiting signal serve absorb the static pulse simultaneously the magnetic bead both ends set up a ESD device and the 2nd ESD device respectively, and when outside discharge voltage surpassed the clamped voltage of a ESD device and/or the 2nd ESD device, triggered a ESD device and/or the 2nd ESD device switches on, can release fast the harmful mistake macro -energy in PCB inside. The utility model discloses the SD card interface circuit that has an electrostatic protection function with the aforesaid can solve current electronic product when carrying out CE authentication test, because the poor unstable defect of complete machine product that leads to of ESD protection effect in being applied to the electronic product.