Methods, devices and systems for serial bus transactions with selectable data transaction sizes

A device, comprising:

• a memory cell array;
• decoder circuits configured to determine,
• a memory access operation from command values,
• a memory cell array location from address values, and
• one of a plurality of different data length values (LEN) from an encoded data length value included in metadata;
• control circuits configured to access the memory cell array location according to the memory access operation;
• and
• input/output (IO) circuits that include
• a serial clock input configured to receive a serial clock, and
• at least one serial IO configured to receive command values, address values, and the metadata
• in synchronism with the serial clock, and transfer at least data of the length LEN.

A system, comprising:

• a memory device that includes
• a memory cell array,
• control circuits configured to
• determine a memory access operation and location from command and address values,
• determine one of a plurality of data length values (LEN) from encoded data length values included in metadata,
• access the memory cell array location according to the memory access operation, and
• input/output (IO) circuits configured to
• receive command values, address values, and the metadata at a serial IO in synchronism with the serial clock, and
• transfer at least data of the length LEN;
• and
• a serial bus coupled to at least the IO circuits.