W79E201A单片机解密

　　W79E201是一种快速、8051/52-compatible微处理器和重新设计,消除浪费的时钟和核心记忆的循环。一般说来,W79E201执行指令1.5至3倍的速度比传统8051/52,依靠的是类型的指令,整体性能是2.5倍的速度相同的水晶更好。作为结果,fully-static CMOS工艺设计、W79E201可以做到同样的通量与较低的钟速度,降低了能耗。
　　he W79E201 is a fast, 8051/52-compatible microcontroller with a redesigned processor core that eliminates wasted clock and memory cycles. Typically, the W79E201 executes instructions 1.5 to 3 times faster than that of the traditional 8051/52, depending on the type of instruction, and the overall performance is about 2.5 times better at the same crystal speed. As a result, with the fully-static CMOS design, the W79E201 can accomplish the same throughput with a lower clock speed, reducing power consumption.
　　The W79E201 provides one eight-bit digital/analog input port (Port 1) that includes a ten-bit ADC; three eight-bit, bi-directional and bit-addressable I/O ports; a one-bit port P4.0 for external ISP reboot; three 16-bit timers / counters; and one serial port. These peripherals are supported by an eight-source, two-level interrupt capability.
　　To facilitate programming and verification, the W79E201 contains In-System Programmable (ISP) 16-KB AP Flash EPROM; 4-KB LD Flash EPROM for the loader program in ISP mode; and 256 bytes of RAM. The Flash EPROM allows the program memory to be read and programmed electronically. Once the code is confirmed, it can be protected for security. The W79E201 also supports the in-circuit emulation (ICE) function and a JTAG interface to the development tool for debugging
　　Fully-static-design 8-bit Turbo 51 CMOS microcontroller up to 16MHz
　　16KB of in-system-programmable Flash EPROM (AP Flash EPROM)
　　4 KB of Auxiliary Flash EPROM for the loader program (LD Flash EPROM)
　　256 bytes of on-chip RAM
　　Instruction-set compatible with MSC-51
　　On-chip debug function with JTAG interface to development tool
　　Three 8-bit bi-directional ports
　　Three 16-bit timers / counters
　　8 interrupt sources with two levels of priority
　　One enhanced full-duplex serial port with framing-error detection and automatic address recognition
　　Port 0 internal pull-up resistor optional
　　Programmable Watchdog Timer
　　6-channel PWM
　　Software-programmable access cycle to external RAM/peripherals
　　10-bit ADC with eight-channel analog input or digital input port
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