Motorola Corporation

Ford Motor Company Limited

Marcella Evelyn Meyer

Gary L Miller

Kuppuswamy Raghunathan

Robert L Anderson

Timothy Ernest Litch

An electronic circuit having control data registers (24-28) for receiving the output of a digital counter (20) that records clock pulses within a measured time that is determined by a rotary speed sensor (14) which produces a square wave pulse train signal and separate registers (30,32) for recording the time of each signal developed by the speed sensor and the time to produce a pulse train signal of predetermined length whereby the data in the data registers may be used to determine velocity and derivatives of that velocity for use in solving dynamic equations stored in memory thus effecting control system output functions.

Delta time measurement circuit for determining parameter derivatives of

Referring to FIGS. 20-24, in one embodiment, data can be transferred from the data register of a top adjacent timer channel (e.g. 400 in FIG. 20) to the data register of the timer channel itself (401), and from the data register of the timer channel itself (401) to the data register of the bottom adjacent timer channel (402). By programming control register bits (e.g. DVB bits 425-426, DTC bits 423-424, and DTS bits 427-428 in FIG. 21) of selected timer channels (401) to perform these inter-channel data transfers, both stacks and FIFO structures can be formed and used. Stack and FIFO data storage structures can reduce the frequency of service required by the timer channels (400-402), and thus reduce the number of interrupts which must be responded to by a CPU (13 in FIG. 1).

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Austin, TX, United States of America

Marcella Evelyn Meyer