Semiconductor device making reliable initial setting
AssigneeFujitsu Limited
InventorTakahiko Sato
Life of this patent
Estimating the term…
Abstract
A semiconductor device includes a fuse circuit which stores information represented by fuse connections, a power-on circuit which generates a power-on signal that changes a signal level thereof following power-on of the device, a timing circuit which starts timing a predetermined duration upon the signal level change of the power-on signal, and a control circuit which makes an initial setting by referring to the information of said fuse circuit in response to an event that said timing circuit finishes timing the predetermined duration.
Claims8
A semiconductor device, comprising:
- a fuse circuit which stores information represented by fuse connections;
- a power-on circuit which generates a power-on signal that changes a signal level thereof following power-on of the device;
- a timing circuit which starts a time measurement upon the signal level change of the power-on signal;
- and
- a control circuit which makes an initial setting by referring to the information of said fuse circuit in response to a completion of said time measurement for a predetermined duration.
A method of making an initial setting in a semiconductor device, comprising the steps of:
- generating a signal that changes a signal level thereof following a power-on of the device;
- starting timing a predetermined duration upon the signal level change of the signal;
- and
- making an initial setting to an internal circuit after passage of the predetermined duration by referring to information stored in advance.
Dependencies are inferred from the claim text.