单片机解密又叫单片机破解，芯片解密，IC解密，但是这严格说来这几种称呼都不科学，但已经成了习惯叫法，我们把CPLD解密，DSP解密都习惯称为单片机解密。单片机只是能装载程序芯片的其中一个类。能烧录程序并能加密的芯片还有DSP，CPLD，PLD，AVR，ARM等。当然具存储功能的存储器芯片也能加密，比如DS2401 DS2501 AT88S0104 DM2602 AT88SC0104D等，当中也有专门设计有加密算法用于专业加密的芯片或设计验证厂家代码工作等功能芯片，该类芯片业能实现防止电子产品复制的目的。
　　如有需对AT91FR4042解密请联系：
　　单片机/ic芯片解密咨询电话：
　　邮编：518033
　　电话：0755-83035861，83035701
　　地址：深圳市福田区国际科技大厦2603单元

　　The AT91FR4042 is a member of the Atmel AT91 16/32-bit Microcontroller family,which is based on the ARM7TDMI processor core. The processor has a high-performance 32-bit RISC architecture with a high-density 16-bit instruction set and very low power consumption.
　　The AT91FR4042 ARM microcontroller features 2 Mbits of on-chip SRAM and 4 Mbits of Flash memory in a single compact 121-ball BGA package. Its high level of integration and very small footprint make the device ideal for space-constrained applications.
　　The high-speed on-chip SRAM enables a performance of up to 63 MIPs and significant power reduction over an external SRAM implementation.The Flash memory may be programmed via the JTAG/ICE interface or the factory-programmed Flash Uploader using a single device supply, making the AT91FR4042 suitable for in-system programmable applications.
　　AT91FR4042　Features
　　Incorporates the ARM7TDMI? ARM? Thumb? Processor Core
　　– High-performance 32-bit RISC Architecture
　　– High-density 16-bit Instruction Set
　　– Leader in MIPS/Watt
　　– Embedded ICE (In-circuit Emulation)
　　256K Bytes of On-chip SRAM (2 Mbits)
　　– 32-bit Data Bus, Single-clock Cycle Access
　　256K Words 16-bit Flash Memory (4 Mbits)
　　– Single Voltage Read/Write
　　– Sector Erase Architecture
　　– Low-power Operation
　　– Data Polling, Toggle Bit and Ready/Busy End of Program Cycle Detection
　　– Reset Input for Device Initialization
　　– Factory-programmed AT91 Flash Uploader Software
　　Fully Programmable External Bus Interface (EBI)
　　– Up to Eight Chip Selects, Maximum External Address Space of 64M Bytes
　　– Software Programmable 8/16-bit External Data Bus
　　8-level Priority, Individually Maskable, Vectored Interrupt Controller
　　– Four External Interrupts, Including a High-priority Low-latency Interrupt Request
　　32 Programmable I/O Lines
　　3-channel 16-bit Timer/Counter
　　– Three External Clock Inputs, Two Multi-purpose I/O Pins per Channel
　　Two USARTs
　　– Two Dedicated Peripheral Data Controller (PDC) Channels per USART
　　Programmable Watchdog Timer
　　Advanced Power-saving Features
　　– CPU and Peripherals can be Deactivated Individually
　　Fully Static Operation:
　　– 0 Hz to 75 MHz Internal Frequency Range at VDDCORE = 1.65V, 85°C
　　2.7V to 3.6V I/O and Flash Operating Range, 1.65V to 1.95V Core Operating Range
　　-40°C to 85°C Temperature Range
　　Available in a 121-ball 10 x 10 x 1.2 mm BGA Package with 0.8 mm Ball Pitch