Electrical circuit and method for determining resistor values and method for programming a turn on/off speed of switch circuitry

An electrical circuit operative to measure digital resistance values, the electrical circuit comprising:

• a semiconductor chip comprising a first pin and a second pin, wherein the semiconductor chip is configured to receive a supply voltage, wherein the first pin is configured to receive a first voltage applied, and wherein the second pin is configured to receive the first voltage or receive a second voltage, the first voltage being lower than the supply voltage and the second voltage being equal to a reference potential,
• a first external resistor connected between the second pin and the reference potential and a second external resistor connected between the first pin and the second pin,
• wherein the electrical circuit is further configured to, in a first operation, receive the first voltage at the second pin and to mirror internally a first current flowing from the second pin through the first external resistor to the reference potential due to the first voltage in order to determine, using an analog to digital converter, a first digital resistance value representing a resistance of the first external resistor,
• wherein the electrical circuit is configured to, in a second operation, receive the second voltage at the second pin and to mirror internally a second current flowing from the first pin through the second resistor to the second pin due to the second voltage in order to determine, using the analog to digital converter, a second digital resistance value representing a resistance of the second external resistor.

An apparatus comprising:

• a first circuit node coupling a first resistor and a second resistor in series between an input voltage source and a reference voltage source;
• current mirror circuitry coupled to monitor the first circuit node, the current mirror circuitry operative to:
• i) produce a first mirror current based a first current conveyed through the first resistor, and ii) produce a second mirror current based on a second current conveyed through the second resistor;
• and
• measurement circuitry operative to determine resistances of the first resistor and the second resistor based at least in part on monitoring of the first circuit node.