Memory systems having controllers embedded in packages of integrated circuit memory

A method comprising:

• receiving, in a controller embedded in a first integrated circuit package of a plurality of integrated circuit packages, first packets from a serial connection outside of the first integrated circuit package;
• converting, by the controller, the first packets into commands and addresses according to a predetermined serial communication protocol;
• operating, by the controller on memory units within the first integrated circuit package, according to the commands and the addresses;
• converting results of at least a portion of the commands into second packets;
• and
• transmitting, by the controller, the second packets to the serial connection outside of the integrated circuit package.

A device, comprising:

• a plurality of memory components, each of the plurality of memory components comprising:
• a plurality of integrated circuit dies each comprising at least one memory unit;
• and
• a first controller comprising a serial communication interface;
• and
• a second controller having a plurality of serial communication interfaces, each of the plurality of serial communication interfaces connected to the serial communication interface of one of the plurality of memory components.