Electrical control unit

Japanese Patent JP6158029

B2

Provided is an electronic control device having an input processing circuit capable of arbitrarily connecting a pull-up resistor or a pull-down resistor or both of the pull-up resistor and the pull-down resistor to an input signal from outside and capable of arbitrarily setting a resistance value of the pull-up resistor and/or the pull-down resistor connected, wherein whether the resistance value of the pull-up/pull-down resistor is a designed value can be diagnosed. Provided is the input processing circuit provided with a unit that diagnoses whether the resistance value of the pull-up resistor and/or the pull-down resistor is within an expected range. Specifically, the pull-down resistor is connected to the pull-up resistor when the resistance value of the pull-up resistor is to be diagnosed, the pull-up resistor is connected to the pull-down resistor when the resistance value of the pull-down resistor is to be diagnosed, and the resistance value is diagnosed based on the voltage divided by both of the pull-up resistor and the pull-down resistor. Alternatively, the pull-up resistor or the pull-down resistor is connected to an externally-connected reference resistor group having a known resistance value, and the resistance value is diagnosed based on the voltage divided by both of the pull-up resistor and the pull-down resistor.

JP5509187	Output buffer circuit and fanout buffer
JPH0628859	SEMICONDUCTOR DEVICE
JPH05335927	SEMICONDUCTOR DEVICE

Hiroshi Iwasawa
Hirotsu Teppei
Chihiro Sato

JP2013212430A

July 05, 2017

October 10, 2013

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Hitachi Automotive Systems, Ltd.

H03K19/0175; F02D45/00; G01R31/50; H03K19/00

JP3210047A
JP2001244813A
JP2003182607A
JP2013225781A

Yuji Toda

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