Non-volatile semiconductor memory device and semiconductor device
View Patent ↗Provided is a semiconductor non-volatile memory device capable of improving the accuracy of trimming by creating a written state before data is written into a non-volatile memory element. The semiconductor non-volatile memory device includes: a written data transmission circuit for transmitting written data to a non-volatile memory element; a first switch connected between the non-volatile memory element and a data output terminal; a third switch connected to an output terminal of the written data transmission circuit; and a control circuit for controlling the respective switches. When a test mode signal is input, the control circuit turns on only the first switch and the third switch so as to control the written data to be output to the data output terminal before data is written into the non-volatile memory element.
1. A non-volatile semiconductor memory device, comprising:
a non-volatile memory element;
a data output terminal for outputting data of the non-volatile memory element;
a latch circuit for holding the data connected to the data output terminal;
a written data transmission circuit for outputting written data to the non-volatile memory element;
a first switch connected between the non-volatile memory element and the data output terminal;
a second switch connected between the data output terminal and a low voltage side power supply terminal;
a third switch connected to an output terminal of the written data transmission circuit;
a fourth switch connected between the non-volatile memory element and a high voltage side power supply terminal; and
a control circuit for controlling the first switch, the second switch, the third switch, and the fourth switch,
the control circuit comprising a test terminal,
the control circuit being configured to, when a test mode signal is input to the test terminal, turn on the first switch by a first control signal, turn off the second switch by a second control signal, turn on the third switch by a third control signal, and turn off the fourth switch by a fourth control signal, to control the written data of the written data transmission circuit to be output to the data output terminal.
2. A non-volatile semiconductor memory device according to claim 1 , wherein:
the first switch is controlled by a signal based on the first control signal and the written data;
the second switch is controlled by a signal based on the second control signal and the written data; and
the third switch is controlled by a signal based on the third control signal and the written data.
3. A semiconductor device, comprising a trimming data memory circuit,
the trimming data memory circuit comprising the non-volatile semiconductor memory device according to claim 1 .