DS87C520MCL ,EPROM/ROM High-Speed MicrocontrollersFEATURES PIN CONFIGURATIONS 80C52 Compatible TOP VIEW8051 Pin- and Instruction-Set Compatible F ..
DS87C520-MCL ,EPROM/ROM high-speed micro, 80C52-compatible, 256 bytes scratchpad RAM, 16kB program memory, 1kB extra on-chip SRAM for MOVX, 33 MHzfeatures of the DS87C520 will apply to the DS83C520, with the exception of EPROM-specific
DS87C520-MCL ,EPROM/ROM high-speed micro, 80C52-compatible, 256 bytes scratchpad RAM, 16kB program memory, 1kB extra on-chip SRAM for MOVX, 33 MHzFEATURES PACKAGE OUTLINE § 80C52-compatible - 8051 pin and instruction set compatible - Four 8- ..
DS87C520-MCL ,EPROM/ROM high-speed micro, 80C52-compatible, 256 bytes scratchpad RAM, 16kB program memory, 1kB extra on-chip SRAM for MOVX, 33 MHzfeatures a redesigned processor core without wasted clock and memory cycles. As a result, it execut ..
DS87C520MCL+ ,EPROM/ROM High-Speed MicrocontrollersFEATURES PACKAGE OUTLINE § 80C52-compatible - 8051 pin and instruction set compatible - Four 8- ..
DS87C520-MCL+ ,EPROM/ROM High-Speed Microcontrollers PRELIMINARY DS87C520/DS83C520EPROM/ROM High-Speed Micro
ECH8604 ,N CHANNEL MOS SILICON TRANSISTOR
ECH8605 ,Pch+PchAbsolute Maximum Ratings at Ta=25°CParameter Symbol Conditions Ratings UnitDrain-to-Source Voltage ..
ECH8606 ,Nch+NchAbsolute Maximum Ratings at Ta=25°CParameter Symbol Conditions Ratings UnitDrain-to-Source Voltage ..
ECH8613 ,Pch+PchAbsolute Maximum Ratings at Ta=25°CParameter Symbol Conditions Ratings UnitDrain-to-Source Voltage ..
ECH8649 ,N-Channel Power MOSFET, 20V, 7.5A, 17mOhm, Dual ECH8Maximum Ratings at Ta=25°CParameter Symbol Conditions Ratings UnitDrain-to-Source Voltage V 20 VDSS ..
ECH8653 ,N-Channel Power MOSFET, 20V, 7.5A, 20mOhm, Dual ECH8Maximum Ratings at Ta=25°CParameter Symbol Conditions Ratings UnitDrain-to-Source Voltage V 20 VDSS ..
DS87C520MCL
EPROM/ROM High-Speed Microcontrollers
FEATURES 80C52 Compatible 8051 Pin- and Instruction-Set Compatible Four 8-Bit I/O Ports
Three 16-Bit Timer/Counters
256 Bytes Scratchpad RAM
Large On-Chip Memory 16kB Program Memory
1kB Extra On-Chip SRAM for MOVX
ROMSIZE Feature Selects Internal ROM Size from 0 to 16kB
Allows Access to Entire External Memory Map Dynamically Adjustable by Software
Useful as Boot Block for External Flash
High-Speed Architecture 4 Clocks/Machine Cycle (8051 = 12)
Runs DC to 33MHz Clock Rates
Single-Cycle Instruction in 121ns Dual Data Pointer
Optional Variable Length MOVX to Access
Fast/Slow RAM/Peripherals
Power Management Mode Programmable Clock Source to Save Power
CPU Runs from (Crystal/64) or (Crystal/1024) Provides Automatic Hardware and Software Exit
EMI Reduction Mode Disables ALE Two Full-Duplex Hardware Serial Ports High Integration Controller Includes: Power-Fail Reset
Early-Warning Power-Fail Interrupt Programmable Watchdog Timer
13 Interrupt Sources with Six External Available in 40-pin PDIP, 44-Pin PLCC, 44-Pin TQFP, and 40-Pin Windowed CERDIP Factory Mask DS83C520 or EPROM (OTP)
DS87C520
PIN CONFIGURATIONS
DS87C520/DS83C520
EPROM/ROM High-Speed MicrocontrollersDALLAS is a registered trademark of Dallas Semiconductor Corp.
MAXIM is a registered trademark of Maxim Integrated Products, Inc.
DS87C520/DS83C520 EPROM/ROM High-Speed Microcontrollers
ORDERING INFORMATION DESCRIPTION The DS87C520/DS83C520 EPROM/ROM high-speed microcontrollers are fast 8051-compatible
microcontrollers. They feature a redesigned processor core without wasted clock and memory cycles. As
a result, the devices execute every 8051 instruction between 1.5 and 3 times faster than the original 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 DS87C520/DS83C520 offer a maximum crystal speed of 33MHz,
resulting in apparent execution speeds of 82.5MHz (approximately 2.5X).
The DS87C520/DS83C520 are pin compatible with all three packages of the standard 8051, and include
standard resources such as three timer/counters, serial port, and four 8-bit I/O ports. They feature 16kB of
EPROM or mask ROM with an extra 1kB of data RAM. Both OTP and windowed packages are available.
Besides greater speed, the microcontroller includes a second full hardware serial port, seven additional
interrupts, programmable Watchdog Timer, Brownout Monitor, and Power-Fail Reset. The device also
provides dual data pointers (DPTRs) to speed block data memory moves. It also can adjust the speed of
MOVX data memory access from two to nine machine cycles for flexibility in selecting external memory and peripherals.
A new Power Management Mode (PMM) is useful for portable applications. This feature allows software
to select a lower speed clock as the main time base. While normal operation has a machine cycle rate of 4
clocks per cycle, the PMM runs the processor at 64 or 1024 clocks per cycle. For example, at 12MHz,
standard operation has a machine cycle rate of 3MHz. In Power Management Mode, software can select either 187.5kHz or 11.7kHz machine cycle rate. There is a corresponding reduction in power
consumption when the processor runs slower.
The EMI reduction feature allows software to select a reduced emission mode. This disables the ALE
signal when it is unneeded.
The DS83C520 is a factory mask ROM version of the DS87C520 designed for high-volume, cost-sensitive applications. It is identical in all respects to the DS87C520, except that the 16kB of EPROM is
replaced by a user-supplied application program. All references to features of the DS87C520 will apply to
The High-Speed Microcontroller User’s
Guide must be used in conjunction with this data sheet. Download it at:
/microcontrollers.
DS87C520/DS83C520 EPROM/ROM High-Speed Microcontrollers
Figure 1. Block Diagram
PIN DESCRIPTION
DS87C520/DS83C520 EPROM/ROM High-Speed Microcontrollers
PIN DESCRIPTION (continued)
DS87C520/DS83C520 EPROM/ROM High-Speed Microcontrollers
PIN DESCRIPTION (continued)
