DESCRIPTION
The DS80C310 is a fast 80C31/80C32-compatible microcontroller. It features a redesigned processor core without wasted clock and memory cycles. As a result, it executes every 8051 instruction between 1.5 and 3 times faster than the original architecture for the same crystal speed. Typical applications will see a speed improvement of 2.5 times using the same code and the same crystal. The DS80C310 offers a maximum crystal speed of 33 MHz, resulting in apparent execution speeds of 82.5 MHz (approximately 2.5X).
The DS80C310 is pin-compatible with the standard 80C32 and includes standard resources such as three timer/counters, 256 bytes of RAM, and a serial port. It also provides dual data pointers (DPTRs) to speed block data memory moves. It also can adjust the speed of MOVX data memory access between two and nine machine cycles for flexibility in selecting external memory and peripherals. The DS80C310 offers upward compatibility with the DS80C320.

FEATURES
■ 80C32-compatible
   - 8051 pin- and instruction set-compatible
   - Full duplex serial port
   - Three 16-bit timer/counters
   - 256 bytes scratchpad RAM
   - Multiplexed address/data bus
   - Addresses 64 kB ROM and 64 kB RAM
■ High-Speed Architecture
   - 4 clocks/machine cycle (8051 = 12)
   - Runs DC to 33 MHz clock rates
   - Single-cycle instruction in 121 ns
   - Dual data pointer
   - Optional variable length MOVX to access
      fast/slow RAM /peripherals
■ 10 total interrupt sources with 6 external
■ Internal power-on reset circuit
■ Upwardly compatible with the DS80C320
■ Available in 40-pin PDIP, 44-pin PLCC, and 44-pin TQFP