Four-port memory based on dual-port RA (register array)

• Main Authors: XIAO CANWEN, ZHANG LEI, XU JIAQING, XIAO LIQUAN, LU PINGJING, WANG YONGQING, SHEN SHENGYU, ZHANG HEYING, GAO LEI, CAO JIJUN, WANG KEFEI, PANG ZHENGBIN, LIU LU, XU WEIXIA, DAI YI
• Format: Patent
• Language: English
• Published: 11.03.2015
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; PHYSICS

The invention discloses a four-port memory based on a dual-port RA (register array), and aims to solve the problem that a large chip area is occupied when an address buffer is realized through a register bank or a four-port RA at present. The technical scheme is that a free address counter, a free address write control module, a free address read control module, a memory read request generating module, a memory write request generating module, a first AND gate, a second AND gate, a free address exchange register read-write control module, a free address exchange register, a free address selection module, a memory write control module, a memory read control module and a memory output data selection module are added to the dual-port RA. With adoption of the scheme, the four-port memory is realized by the dual-port RA, the occupied area of the memory can be saved when the four-port memory is taken as the address buffer in a multi-VC (virtual channel) dynamic share buffer, so that the area of a chip is reduced, and wiring congestion is avoided.