Memory control unit and associated method for changing the numbe

Details Memory control unit and associated method for changing the numbe Memory control unit and associated method for changing the numbe

1993-08-04

1995-10-31

Gossage, Glenn

Boots, shoes, and leggings

395550, 364DIG1, G06F 1200, G06F 112

Patent

active

054637562

ABSTRACT:
A memory control unit and associated method for changing memory access time are used in a microprocessor system in order to make it possible to alter the number of wait states in accordance with memory characteristics. The memory control unit incorporates a register which holds at least 1 bit of data related to the wait states, outputs a response signal to a central processing unit (CPU) at a timing changed in accordance with the data held in the register, and changes the data held in the register by executing a write cycle under control of the CPU. The memory control unit includes a section for holding fixed data representing a fixed delay time based upon an anticipated access time of a memory unit, in addition to the register which holds variable data representing a variable delay time, and an output circuit which adds the fixed data and variable data to produce data representing a total delay time.

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