US 7,321,994 B2
Electronic control unit
Hideki Kabune, Chiryu (Japan); and Hiromi Maehata, Chiryu (Japan)
Assigned to DENSO CORPORATION, Kariya (Japan); and ADVICS CO., LTD., Aichi-pref. (Japan)
Filed on Feb. 05, 2004, as Appl. No. 10/771,469.
Claims priority of application No. 2003-029884 (JP), filed on Feb. 06, 2003.
Prior Publication US 2004/0158779 A1, Aug. 12, 2004
Int. Cl. G06F 11/00 (2006.01)
U.S. Cl. 714—55 15 Claims
OG exemplary drawing
 
5. An electronic control unit comprising:
a microcomputer for controlling an actuator;
a first internal timer and a second internal timer; and
a switching means, wherein
the microcomputer includes a first input capture function for capturing a time of the first internal timer at which an edge of each of square wave input signals is detected,
the microcomputer performs calculation for the control of the actuator based on the time of the first internal timer,
the switching means selects the square wave input signals in orderly sequence for capturing,
the microcomputer further includes a second input capture function for capturing a time of the second internal timer at which the edge of the selected square wave input signal is detected, and
the microcomputer diagnoses at least one of the first and the second capturing functions by performing comparison between the time of the first internal timer and the time of the second internal timer.