Devices, systems, and methods of reducing chip select

摘要

Several systems and methods of chip select are described. In one such method, a device maintains two identifiers, (ID_a and ID_m). When the device receives a command, it examines the values of ID_a and ID_m relative to a third reference identifier (ID_s). If either ID_a or ID_m is equivalent to ID_s, the device executes the command, otherwise, the device ignores the command. By using two different identification methods, a system has options in choosing to activate devices, being able to selectively switch between selecting multiple devices and single devices in a quick manner. In another such method, a device may have a persistent area that stores identification information such as an ID_a. Thus, system functionality may remain independent from any defect/marginality associated with the physical or logical components required for initial ID_a assignment of all devices in the system.

主权项

1. A method for selecting devices within a system that contains a first device, a second device, and a third device, the method comprising:
assigning an identical master identifier to each device within the system; assigning a first assigned identifier to the first device; assigning a second assigned identifier to the second device; assigning a third assigned identifier to the third device; and selecting each of the first device, second device, and third device by setting a select identifier to a value equal to the master identifier.