Digital data processor including apparatus for collecting time-r

Details Digital data processor including apparatus for collecting time-r Digital data processor including apparatus for collecting time-r

1992-12-07

1993-08-03

Miska, Vit W.

Horology: time measuring systems or devices

Time interval

Electrical or electromechanical

395550, 395725, G04F 800, G06F 104

Patent

active

052335739

ABSTRACT:
A digital timer apparatus incorporates a free running counter, an interval timer, a capture register, a pulse accumulator and holding logic. A rising or falling edge of an external signal causes the current contents of the free running counter to be loaded into the capture register and causes the pulse accumulator to be incremented. The output of the interval timer can cause the contents of the pulse accumulator and capture register to be stored into the holding logic. The timer apparatus is particularly well suited to performing tasks related to the determination of the speed of rotation of a rotating member and may be used, for instance, in detecting wheel rotational speeds in an anti-lock brake system or detecting shaft rotation speeds in an automatic transmission.

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Motorola, Inc. HC11 M68HC11 Reference Manual; Prentice Hall, Englewood Cliffs, N.J. 07632; 1989, 1988; pp. 10-1 through 11-12.

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