| 摘要 |
PROBLEM TO BE SOLVED: To provide a circuit updating temperature information in accordance with a refresh period in a semiconductor element. SOLUTION: The device is provided with a temperature information output means measuring internal temperature of the semiconductor element, generates a temperature information signal having measured temperature information, and updating the temperature information signal in accordance with the refresh period. The device is also provided with a temperature information output means in which internal temperature of the semiconductor element is measured and a plurality of flag signals of which the logical levels are changed in accordance with a temperature information code and measured temperature are generated and the temperature information code is updated in response to a refresh instruction signal in a normal mode or a self-refresh oscillation signal in a self-refresh mode, a code storing means storing the updated temperature information code, a memory control means reading out stored data and varying a period of the refresh instruction signal, and a self-refresh oscillation means varying a period of the self-refresh oscillation signal in accordance with the plurality of flag signals. COPYRIGHT: (C)2008,JPO&INPIT |
