PURPOSE: To improve flexibility by providing a program RAM constituted of memory elements arranged in m columns n rows, a programmable partial cycle index register, a sequence control means and a signal MUX means.
CONSTITUTION: The program RAM 20 is divided to m pieces of timing sequence, and timing transition is decided by that a bit exists in the sequence. Further, the RAM 20 contains the programmable partial cycle index register 28 for storing a partial cycle index, and each index answers to one of micro-sequence specified by the RAM 20, and encoding of a bit incorporated in each index specifies specified partial division of a cycle causing the timing transition in them. Then, a sequence controller 24 sequences arrays ranging to the whole access by selecting the column of the RAM 20, and the signal MUX 22 selects memory array control lines 40-48 according to kinds of operation. Thus, different control signal timing are dealt with, and the flexibility is improved.
ROBAATO DOYUZETSUTO
EMU BUITSUTARU KINI
KENTO MEISON
MAAKU ESU MAIAASU
SANIIRU SHIENOI
