19-4859 Rev 8/09 DS80C310 High-Speed Microcontroller www .maxim-ic.com GENERAL DESCRIPTION PIN CONFIGURATIONS The DS80C310 is a fast 80C31/80C32-compatible TOP VIEW 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 Note: Designers must have two documents to fully use all the features Internal Power-On Reset Circuit of this device: this data sheet and the High-Speed Microcontroller Upwardly Compatible with the DS80C320 Users Guide, available on our website at www.maxim- ic.com/microcontrollers. Data sheets contain pin descriptions, Available in 40-Pin Plastic DIP, 44-Pin PLCC, feature overviews, and electrical specifications, whereas the users and 44-Pin TQFP guide contains detailed information about device features and operation. Note: Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device may be simultaneously available through various sales channels. For information about device errata, click here: www.maxim-ic.com/errata. 1 of 22 DS80C310 ORDERING INFORMATION MAX CLOCK PART TEMP RANGE PIN-PACKAGE SPEED (MHz) DS80C310-MCG 25 40 Plastic DIP 0C to +70 C DS80C310-MCG+ 0C to +70 C 25 40 Plastic DIP DS80C310-QCG 0C to +70 C 25 44 PLCC DS80C310-QCG+ 25 44 PLCC 0C to +70 C DS80C310-QNG 25 44 PLCC -40C to +85C DS80C310-QNG+ 25 44 PLCC -40C to +85C DS80C310-ECG 0C to +70 C 25 44 TQFP DS80C310-ECG+ 0C to +70 C 25 44 TQFP + Denotes a lead(Pb)-free/RoHS-compliant device. Figure 1. Block Diagram DS80C310 2 of 22