68020

Description

The 68020 has 32-bit internal and external data and address buses, compared to the early 680x0 models with 16-bit data and 24-bit address buses. The 68020's ALU is also natively 32-bit, so can perform 32-bit operations in one clock cycle, whereas the 68000 took a minimum of two clock cycles due to its 16-bit ALU. Newer packaging methods allowed the '020 to feature more external pins without the large size that the earlier dual in-line package method required. The 68EC020 lowered cost through a 24-bit address bus. The 68020 was produced at speeds ranging from 12 MHz to 33 MHz.