US 10,833,688 B2 · Electronic control device

Abstract

An inexpensive electronic control device is implemented that enables a power supply voltage supplied to a microcomputer to be varied using a simple method and that enables an identical power supply to be adapted to various microcomputers. A switch is turned on to determine the value of a discrete resistor, and a voltage based on the value of current from a current source and the resistance value of the discrete resistor is caused in an In1 terminal. By an A/D converter, the In1 terminal voltage is subjected to A/D conversion, and a digital code corresponding to the selectively connected discrete resistor is detected. The result of the A/D conversion is saved in a register, and the determination of the resistance value of the discrete resistor performed by the A/D converter is completed. After the completion of the resistance value determination performed by the A/D converter, power supply voltages start activation. The core voltage activates to secure a voltage corresponding to a reference voltage set by the register and thereby a desired power supply is completed.

Claims13

Dependent claims

An electronic control device comprising:

an integrated circuit having a voltage adjustment unit;
and
a discrete component connected to the integrated circuit, wherein
voltage output from the voltage adjustment unit is changed by changing the discrete component;
and
the integrated circuit includes:
an A/D converter to which the discrete component is connected,
a register for storing a digital code output from the A/D converter, and
a variable voltage source in which a voltage corresponding to the digital code stored in the register is set, and
the voltage adjustment unit adjusts the voltage according to the voltage of the variable voltage source.

7 more elements

Dependencies are inferred from the claim text.

Electronic control device

Life of this patent

Electronic control device

Life of this patent

Abstract

Claims13