Semiconductor device and electronic device

An electronic device comprising a circuit board on which a memory control chip, a component connected to said memory control chip, and a memory cell array unit are mounted, wherein

• the memory control chip includes:
• a memory controller;
• a regulator configured to generate a first voltage and supply said first voltage to said memory controller through a first line;
• an external terminal connected to said first line, the external terminal externally connecting said component;
• a test discharge execution unit configured, upon receiving a test start signal, to stop an operation of said regulator and discharge said component by applying a predetermined potential to said first line;
• a discharge duration measurement unit configured to measure a time required from the reception of said test start signal to a drop of the voltage of said first line below a second voltage that is lower than said first voltage, as a discharge duration;
• and
• a second external terminal for outputting a test result signal including information representing said discharge duration measured by said discharge duration measurement unit to the outside,
• said component is externally connected to said external terminal of said memory control chip, and
• said memory controller controls writing and reading of data into and from said memory cell array unit.