A microcontroller architecture that adds a dedicated bit in the op-code decode field to force data access to take place on a page of the random access memory (RAM) for that instruction. This allows the user to have any page selected and still have direct a...

A passive signal discriminator for preventing activation by undesired signals of low power transponder circuits in a keyless entry system. These undesired signals may be noise or interfering signals. An asymmetrical low pass filter is used to determine the...