مدار مجتمع (آی سی) آی سی‌کاربرد ویژه

Product Attributes

Introduction

The Am2903A is a four-bit expandable bipolar microprocessor slice. The Am2903A performs all functions performed by the industry standard Am2901 and, in addition, provides a number of significant enhancements that are especially useful in arithmetic-oriented processors. Infinitely expandable memory and three-port, three-address architecture are provided by the Am2903A. In addition to its complete arithmetic and logic instruction set, the Am2903A provides a special set of instructions which facilitate the implementation of multiplication, division, normalization, and other previously time-consuming operations. The Am2903A is identical to the Am2903 but up to 30% faster.

Features

• Expandable Register File: The Am2903A includes the necessary "hooks" to expand the register file externally to any number of registers.
• Built-in Parity Generation and Sign Extension Circuitry: Can supply parity across the entire ALU output and provide sign extension at any slice boundary.
• Built-in Division Logic: Executes non-restoring, multiple-length division with correction of the quotient.
• Built-in Normalization Logic: The mantissa and exponent of a floating-point number can be developed using a single microcycle per shift. Status flags indicate when the operation is complete.
• Built-in Multiplication and Division Logic: Performs unsigned multiplication, two's complement multiplication and the last cycle of a two's complement multiplication.