RISC microprocessor with integrated bus control unit - connects read=write buffer, for storing data, address and control signals, to bus interface and to second control unit, which controls external bus for coupling peripherals to microprocessor

摘要

The microprocessor includes a bus (1) connected to a central processor (10) and a second bus (5) connected to an integrated peripheral device (11). A read-write buffer memory (6) is connected to a bus interface (3) and to a control unit (7). The control unit controls an external bus (8) for connection to external peripheral devices (12). The read-write buffer memory stores data, address, and control signals. The control signals include information on data width. A signal is generated on the first (1) or second bus (5) when the read-write buffer memory is full. The control device allows block reading from the external bus (8) to the buffer memory. ADVANTAGE - Processor is not adversely affected by peripheral devices.