| 摘要 |
PROBLEM TO BE SOLVED: To use large-zone driving/boot signal line without excessive power consumption by allowing a first active row factor signal to actuate a plurality of predecoders, and by allowing a second active row factor signal to select at least one decoder. SOLUTION: A row factor signal generator 18 and a driving/boot signal generator 20 are formed in an end periphery zone 14. According to an address being received by an address signal generator, a plurality of row factor signals are outputted to each row factor signal line. A first set of row factor signals determine which of a plurality of spare decoder output lines transfers the driving/boot signal. A second set of row factor signals select a spare decoder to be actuated to transmit the driving/boot signal to the spare decoder output line. Furthermore, another set of row factor signals select at least one decoder, receive the driving/boot signal of the spare decoder output line, and at the same time transfers the driving/boot signal to a selected word line.
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