US Patent 7356654 Flexible multi-area memory and electronic device using the same

A flexible multi-area memory used for an electronic device such as a mobile phone includes a storage area with a given capacity. The storage area has a first area accessed only by a first processor, a second area accessed only by a second processor, and a common area shared by the first and the second processors. The common area has two ports and thereby simultaneously accessible from the first and the second processors. Each capacity of the first, the second, and the common areas can be set arbitrarily.