Data reading device

摘要

There is disclosed a data reading device in which data of a nonvolatile storage element is reflected in a circuit to be regulated, with a minimum necessary delay width after turning a power on or after reset cancellation, and wrong writing due to a static electricity is prevented. A delay circuit is additionally disposed to output a delayed data reading signal after a signal of turning the power on or a signal of the reset cancellation is generated. A delay time T2 and a static electricity convergence time T1 are set so as to keep a relation of T1

主权项

1. A data reading device comprising:
a crystal oscillation circuit which outputs a source oscillation for generation of a timing to perform data reading; a frequency dividing circuit which divides a frequency of the source oscillation; an oscillation stop detection circuit which detects whether the crystal oscillation circuit outputs oscillation, by use of an arbitrary frequency signal generated in the frequency dividing circuit; a reading signal generation circuit which outputs a-data reading signals; a delay circuit which delays the data reading signal; and a data reading circuit including a nonvolatile storage element, wherein the reading signal generation circuit outputs a first reading signal and a second reading signal, and into the data reading circuit where the second reading signal is delayed by the delay circuit.