Microcomputer

Abstract

Abstract PURPOSE:To access memory spaces different in size by a program by adding a value included in a part of an instruction code and a value shifted by shift information to generate the address of a memory. CONSTITUTION:A register selecting part 143 outputs register designating information 143-1 to a register file 130. A segment address select signal 143-2 is outputted to a selector 154 in a PAU 150 for a prescribed period, and the processing operation to generate a physical address in the PAU 150 is performed based on this segment address select signal 143-2. The segment address latched in a segment address latch 152 is outputted to the selector 154, and a signal where four bits are added to upper bits of the address is selected and is outputted to a PA calculation processing part 153. Thus, the signal outputted from the selector 154 and the signal from the latch 152 are added and the result is outputted to a BCU 110.

Inventors

• 👤 Rika Yabui
• 👤 藪井　里佳
• 👤 Katsumi Miura
• 👤 勝己 三浦

Bibliographic Details