Note: Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device

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GENERAL 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 1.5x

and 3x faster than the original architecture for the

same crystal speed. Typical applications have a speed

improvement of 2.5x using the same code and the

same crystal. The DS80C310 offers a 25MHz

maximum

crystal

speed,

resulting

in

apparent

execution speeds of 62.5MHz (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 64kB ROM and 64kB RAM



High-Speed Architecture

4 Clocks/Machine Cycle (8051 = 12)

Runs DC to 25MHz Clock Rates

Single-Cycle Instruction in 160ns

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 Plastic DIP, 44-Pin PLCC,

and 44-Pin TQFP

PIN CONFIGURATIONS

Note: Designers must have two documents to fully use all the features

of this device: this data sheet and the High-Speed Microcontroller

User’s Guide, available on our website at

www.maxim-

ic.com/microcontrollers. Data sheets contain pin descriptions,

feature overviews, and electrical specifications, whereas the user’s

guide contains detailed information about device features and

operation.

TOP VIEW

DS80C310

High-Speed Microcontroller

www.maxim-ic.com

19-4859; Rev 8/09