Data storage apparatus.

摘要

Data input from a key switch (3) is displayed on a liquid crystal display (2), and whether to store the data in a RAM (6) or an EEPROM (7) is selected by a selection switch. If the EEPROM (7) is selected, a CPU (4) turns on a power switch (10) to apply a high voltage to the EEPROM (7) to write the input data therein. Data stored in the RAM (6) and the EEPROM (7) are read out upon operation of a search switch and are sequentially displayed on the liquid crystal display (2). It is clearly informed whether the currently displayed data is read out from the RAM (6) or the EEPROM (7). With this operation, if data which is required to be protected against disconnection of a power supply voltage or a drop in power supply voltage is stored in the RAM (6), the data can be stored in the EEPROM (7). <IMAGE>