logo

世纪芯DS87C550芯片解密

   文章来源:Internet  发布时间:2010-07-09  访问量:1373

DS87C550芯片世纪芯公司成功解密的,也是目前世纪芯公司已经成功破解的典型芯片型号,世纪芯公司多年来始终专注于各类IC芯片解密、单片机解密、DSP芯片解密、CPLD芯片解密等技术研究领域,可以为广大客户提供高效可靠的解密方案。

下面是DS87C550 简介:
    The DS87C550 EPROM High-Speed Microcontroller with ADC and PWM is a member of the fastest 100% 8051-compatible microcontroller family available. It features a redesigned processor core that removes wasted clock and memory cycles. As a result, it executes 8051 instructions up to three times faster than the original architecture for the same crystal speed. The DS87C550 also offers a maximum crystal speed of 33MHz, resulting in apparent execution speeds of up to 99MHz.
  The DS87C550 uses an industry standard 8051 pin-out and includes standard resources such as three timer/counters, and 256 bytes of scratchpad RAM. This device also features 8kB of EPROM with an extra 1kB of data RAM (in addition to the 256 bytes of scratchpad RAM), and 55 I/O ports pins. Both One-Time-Programmable (OTP) and windowed packages are available. Besides greater speed, the DS87C550 includes a second full hardware serial port, seven additional interrupts, a programmable watchdog timer, brownout monitor, and power-fail reset.
  The DS87C550 also provides dual data pointers (DPTRs) to speed block data memory moves. The user can also dynamically adjust the speed of external accesses between two and 12 machine cycles for flexibility in selecting memory and peripherals.Power Management Mode (PMM) is useful for portable or battery-powered 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 allows the processor to run at 1024 clocks per cycle.For example, at 12MHz, standard operation has a machine cycle rate of 3MHz. In Power Management Mode, software can select an 11.7 kHz (12MHz/1024) machine cycle rate. There is a corresponding reduction in power consumption due to the processor running slower.
  The DS87C550 also offers two features that can significantly reduce electromagnetic interference (EMI). One EMI reduction feature allows software to select a reduced emission mode that disables the ALE signal when it is unneeded. The other EMI reduction feature controls the current to the address and data pins interfacing to external devices producing a controlled transition of these signals.
DS87C550 FEATURES
  87C52 Compatible
  - 8051 pin and instruction set compatible
  - Three 16-bit timer/counters
  - 256 bytes scratchpad RAM
  On-Chip Memory
  - 8kB EPROM (OTP & Windowed Packages)
  - 1kB extra on-chip SRAM for MOVX access
  On-Chip Analog-to-Digital Converter
  - Eight channels of analog input, 10-bit resolution
  - Fast conversion time
  Pulse-Width Modulator Outputs
  - Four channels of 8-bit PWM
  - Channels cascadable to 16-bit PWM
  Four Capture plus Three Compare Registers
  55 I/O Port Pins
  New Dual Data Pointer Operation
  - Either data pointer can be incremented or decremented
  ROMSIZE Feature
  - Sets effective on-chip ROM size from 0 - 8kB
  - Allows access to entire external memory map
  - Dynamically adjustable by software
  High-Speed Architecture
  - 4 clocks/machine cycle (8051 = 12)
  - Runs DC to 33MHz clock rates
  - Single-cycle instruction in 121ns
  - New Stretch Cycle feature allows access to fast/slow memory or peripherals
  Unique Power Savings Modes
  EMI Reduction Mode Disables ALE if Not Needed
  High-Integration Controller Includes:
  - Power-fail reset
  - Early-warning power-fail interrupt
  - Two full-duplex hardware serial ports
  - Programmable watchdog timer
  16 Total Interrupt Sources with Six External
  Available in 68-Pin PLCC, 80-Pin PQFP, and 68-Pin Windowed CLCC


世纪芯联系方式:
深圳市世纪芯集成电路有限公司

地址:深圳市福田区国际科技大厦2603单元
邮编:518033
24小时服务热线:086-0755-83035821
投诉服务热线:086-0755-83035701
E-mail:corepcb@126.com

需要解密的朋友可以联系我们

品牌价值、美誉度稳居行业第一
公司规模、技术实力稳居行业第一
行业顶尖工程师稳居行业第一
项目交接率、交接数量稳居行业第一

个人与10万元以下项目客户
中小型企业客户
政府/医疗/军事机构/科研机构
大中型企业/集团公司/上市公司
VIP客户/欧美客户/定制型客户