Semiconductor device in 3D stack with communication interface and managing method thereof

A managing method of a semiconductor device with an interface, the semiconductor device including a master device and a plurality of slave devices stacked on the master device one after one as a three-dimension (3D) stack, the managing method comprising:

• configuring the master device to have a master interface;
• and
• configuring each of the slave devices to have a slave interface and a managing circuit, the master interface and the slave interfaces form the interface for passing signals in communication between the master device and the slave devices,
• wherein the managing circuit of a current one of the slave devices drives a next one of the slave devices through the interface,
• wherein an operation command received at the current one of the slave devices is just passed to the next one of the slave devices through the interface,
• wherein a response from the current one of the slave devices is passed back to the master device through the interface.