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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
ote: 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,
eature overviews, and electrical specifications, whereas the user’s
uide contains detailed information about device features and
operation.
TOP VIEW
DS80C310
High-Speed Microcontrolle
www.maxim-ic.com
19-4859
Rev 8/09
