System having registers for receiving data, registers for transmitting

Abstract

An electronic device for transferring data between a serial port and a memory of a CPU is provided having a plurality of data registers for transferring data between said serial port and said memory in response to a first set of control signals, a data bus connected to said registers and said memory for passing data to and from said memory in response to a portion of said first set of control signals, first control circuitry for generating said first set of control signals and for generating at least one interrupt to said CPU, at least one control register connected to said first control circuitry for providing mode control information to said first control circuitry, a plurality of address registers for storing data address, at least one address generator connected to said address registers for automatically generating addresses in response to a second set of control signals, an address bus connected to said address registers, and second control circuitry connected to said address generator, a portion of said control register and said first control circuitry for generating said second set of control signals.