Patent ID: 7930470

Claim:
A memory system, comprising: a memory hub device integrated in a memory module; a set of memory devices coupled to the memory hub device; and a first set of thermal sensors integrated in the set of memory devices, wherein the memory hub device comprises: a command queue that receives a memory access command from an external memory controller via a memory channel at a first operating frequency; a write data queue that receives memory write data from the external memory controller via the memory channel at the first operating frequency; and a read data queue that transmits memory read data from the external memory controller via the memory channel at the first operating frequency; and a memory hub controller integrated in the memory hub device, wherein the memory hub controller: reads the memory access command from the command queue at a second operating frequency; reads the memory write data from the write data queue at the second operating frequency; and writes the read data to the read data queue at the second operating frequency, wherein receiving the memory access command, receiving the write data, and transmitting the read data at the first operating frequency and reading the memory access command, reading the write data, and writing the read data at the second operating frequency implements a fully asynchronous boundary within the memory hub device.