Abstract: Dallas Semiconductor's High-Speed Microcontrollers can improve performance and power consumption when upgrading older 8051/8032 designs. The DS80C320 retains instruction set and object code compatibility, while performing the same operations in fewer clock cycles. The microcontroller is a drop-in replacement for older 8032 and 8051 designs. This application note addresses key issues such as software loops, timers, clock speed, power-on reset and memory interface.