| 摘要 |
A stack memory for high-speed operation comprises a RAM for storing data and a stack pointer for holding an address of the PUSH data. The POP data are always stored in an address smaller by "1" than the address for storing the PUSH data. According to this stack memory, both reading the POP data and storing PUSH data is simultaneously executed, then the one of them can be validated. Thus, it becomes possible to execute the access to the RAM before the data process mode is decided.
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