NRF905 915M based on the frequency of 232 communications

由8051组成的单片机系统通常情况下，P0口分时复用作为地址、数据总线，P2口提供A15-A8即高8位地址，P3口用作第二功能，只有P1口通常用作I/0口。P1口是8位准双向口，它的每一位都可独立地定义为输入或输出，因此既可作为8位的并行I/O口，也可作为8位的输入输出端。当工作在输入方式时，对应位的锁存器必须先置1,才能正确地读到引脚上的信号,否则,执行读引脚指令时,若对应位的锁存器的值为0，读的结果永远为0。-By 8051, composed of single-chip microcomputer system under normal circumstances, P0 timeshare I reuse as address, data bus, P2 I provide A15-A8 high eight address, P3 mouth for the second function, I usually only P1 for I/0 I. P1 I was eight quasi-two-way port, it can be independent of each and every defined as input or output, it can be used as 8-bit parallel I/O port, can also be used as 8-bit input and output side. When the work in the input, the corresponding bit latch must first buy one in order to correctly read the signal pin, or pin the implementation of reading instruction, if the corresponding bit latch the value of 0, Reading the results of Forever to 0.

采用51系列单片机硬件电路对TEA5767收音模块控制源码-51 Series single-chip hardware circuit of TEA5767 radio module control source

MSP430F413的各模块实例程序源代码，很方便调试。-MSP430F413‘demo

开票盖章系统设计开发环境为ICC,可以编译成汇编,直接下栽到嵌入式avr单片机进行控制-drawer sealing systems design and development environment for the ICC, can compile a compendium, Embedded directly to the downward avr microprocessor control

全量程交直流无档电压表的设计 这里只给出了系统设计的方案 带有程序流程图-Wide-range AC-DC voltage meter free stall design here only gives the system design program with a program flow chart

用51内部定时器在Keil uVision3环境下开发的，可调时间和日期的数字钟，并用1602进行显示。-With 51 internal timer in the Keil uVision3 development environment, the time and date Adjustable digital clock, and display 1602.

这个是我写的以t6963为主控芯片的显示屏的程序，能控制所有以t6963为主控的屏-this is what I wrote to the t6963 to the display control chip procedures to control all of the controlling t6963 screen

LT_1B msp430开发板例子程序－UART_U96-LT_1B msp430开发板例子程序－UART_U9600

LT_1B msp430开发板例子程序－ToggleIO

数码管组字，数码管经过排列组合，通过单片机控制组成的屏幕显示。-digital traffic control characters, digital tube through permutations and combinations, SCM control of the screen display.