| 摘要 |
PROBLEM TO BE SOLVED: To improve dispersion of timing of finish of RAS restore operation and start of RAS pre-charge operation in a FCRAM in which a self-timer circuit for determining a RAS restore time (tRAS) of a random cycle time (tRC) and a RAS pre-charge time (tRP) is provided in a ROW system control system. SOLUTION: For example, a signal BNKb is made a 'H' level by an input of a first command. A signal CLKTMRDEF is made a 'L' level 3 clock cycle after input of the command of an internal signal CLKINDRVT based on an external clock signal. Thereby, a signal bBNKTMRb is made a 'L' level. Thereby, the signal BNKb is made a 'L' level. COPYRIGHT: (C)2003,JPO
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