公开(公告)号：US20190335062A1

公开(公告)日：2019-10-31

申请号：US16379124

申请日：2019-04-09

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Hirokazu SOU ,  Toshiyuki HONDA ,  Shigekazu KOGITA ,  Masato SUTO

IPC: H04N1/44 ,  G06F12/10 ,  G06F21/60 ,  H04N1/32

Abstract: A memory controller includes a data discard controller, calculates a physical address of discard object data designated by a logical address by a host device, and registers the calculated physical address as discard object data information. With respect to a predetermined command from the host device, the data discard controller outputs current discard object data information to the host device. When no command is received from the host device, the data discard controller physically erases the discard object data on the basis of the discard object data information.