rs232 rj11

interrupt, you can compile a program with a more complex structure. Such a program can do one thing and monitor one thing. Once something is monitored, interrupt what is being done, process monitoring, of course, you can also monitor multiple things, the image analogy, the interruption function enables the single-chip microcomputer to have a bowl, look at the pot function. The above three steps are equivalent to killing the dragon and giving up the eight-handed martial arts. You can barely prot

levels up to ip30Wide Power Supply settings, input range reaches 5 ~ 35 VThe RS232/RS485/rs422 interface adopts built-in 15 kV ESD protection to prevent static damage.RS485/rs422 interface with built-in 4kv Lightning ProtectionThe power interface adopts built-in reverse protection and overvoltage protection.Gpio, A/D ports, built-in short-circuit and overvoltage protectionLightning Protection for antenna interfaces (optional)4kv lightning protection

); physical Layer authentication and encryption; Link Management. The digital speech processing circuit consists of the Speech Encoding and decoder and the speech interface circuit. The audio codecs adopt the CVSD encoding method. CVSD (Continuous Variable Slope Delta Modulation) is a continuous variable slope incremental modulation. It is an adaptive incremental modulation technology that can obtain high-quality audio encoding without resending voice packets. CVSD encoding is good at processin

How to configure a network device for connecting a notebook to the Console PortIf you use the Console port to manage CISCO devices, connect one end of the Console line to the Console port of the device, and the other end to the DB9 or DB25 interface of the computer.DB9 and DB25 interfaces are generally only available on the desktop. We cannot debug devices around the desktop every day. Instead, we often use laptops to debug devices, many laptops do not have the DB9 and DB25 interfaces, while USB

Transferred from: http://blog.csdn.net/zeroboundary/article/details/8966586In RS232 the CTS and RTS have a clear meaning, but since Hayes (HAYES) introduced smart Cat (SmartModem) is a bit confusing, but now this meaning for the mainstream, the main chip manufacturers of the UART controller flow control basic use HAYES Modem flow control interpretation.In RS232, the RTS and CTS are used to switch direction

　The principle of fault detection in firewall systemAs most computers use Windows systems, firewalls also have their own systems, usually Linux, and computers, firewalls, if there is a failure, can be divided into software failures and hardware failures, hardware failures are more obvious, easy to judge, and software failure because the firewall is usually no information display or display of the small amount, it is not easy to judge, this need through the terminal software, the use of dedicated

Did not study carefully, the use of the next, summed up the point, also searched a bit of information. --------------------------------------------------------------------------------------------------------------- ------------- Simple to speak: (UART and COM) Embedded inside said serial port, generally refers to the UART port, but we often do not know it and COM port differences, as well as RS232, TTL and other relationships, in fact, uart,com refers

The RS232 standard was born before RS485, but there are several deficiencies in RS232: The signal level of the interface is higher, to more than 10 V, the use of improper easy to damage the interface chip, level standard is also incompatible with the TTL level. Transmission rate is limited, can not be too high, generally to zero or zero bits per second (kb/s) to the limit. The interface uses signal lines an

Recently too busy, there is no time to write about the ucos-ii transplant, first of all the work is easy to make a mistake in the knowledge points recorded, about the CTS and RTS. In RS232 the CTS and RTS have a clear meaning, but since Hayes (HAYES) introduced smart Cat (SmartModem) is a bit confusing, but now this meaning for the mainstream, the main chip manufacturers of the UART controller flow control basic use HAYES Modem flow control interpreta

negative differences. When we do not emit light, the operating voltage is red, green, and yellow, 1.8 ~ 2.5 V, Blue 4 V, white 5 V. PWR_SW or PW_ON Power Switch PWR_LED Power Indicator ACPI_LED Advanced Power Management Status Indicator TUBRO_LED or TB_LED indicates the acceleration status indicator. HD_LED or IDE_LED hard drive indicator Scsi led scsi hard drive operating status indicator HD + and HD-indicate the positive and negative sides of the hard drive indicator. Others include MPD + And

This topic simply understands the content of the port;Brief introduction:"Port" is the translation of the English port, it can be considered as the export of communication between the equipment and the outside world.The ports can be divided into virtual ports and physical ports, where the virtual (protocol) port refers to the inside of the computer or the port within the switch router and is not visible.For example, 80 ports, 21 ports, 23 ports, and so on in the computer.The physical port, also

are not continuously changed;The signal generates distortion, noise and attenuation during transmission;----in the transmission of the signal. Signals not related to the input signal due to the equipment itself, environmental disturbances, etc. during processing----Signal-to-noise ratio (S/n) refers to the ratio of the original component to the noise, often expressed in decibels of dbThe attenuation of----signal decreases with the transmission of the signal.Advantages of digital signals:----str

RJ45 the definition and standards of the relevant provisions. 　　 RJ45 is a commonly used name, referring to the standardization of IEC (60) 603-7, using a modular jack or plug of 8 locations (8 pins) defined by the International connectors Standard. IEC (60) 603-7 is also the ISO/IEC 11801 International General cabling Standard Connection hardware reference standard. 　　 ISO/IEC 11801 standards regarding the requirements for connecting hardware: 　　 • The physical dimensions of the information

There is a project that uses the PC104 board (PCM-3341), the Linux system. But at least 3 RS232 in the project, see Datasheet, enough. The board has 3 separate RS232 and a rs232/485 multiplexing port. But in the actual test use, encountered a problem. 1 and 2 can work (later found to be problematic, reading sensor data, reading is not complete), but 3 and 4 have

Qt serial Port class Qserialport use notes Although the RS232 interface is no longer available on most home PCs today. However, due to the simple operation of RS232 serial port and reliable communication, there are still a lot of applications in the industrial field. Qt Previous version, did not provide official support for the RS232 serial port, writing serial

In Ise, the set pin can be constrained by opening the Assign package pins in user constraints. Xilinx pack-[design Object list-i/o Pin opened] Where the parameters are set as follows I/O name--io pin name, corresponding to the input and output pins in module. I/O Direction--Sets the input or output pin. Loc-Located on the chip. Bank-the bank block where the pin is located, and when LOC is specified, the bank is determined. FROM:SPARTAN-3E FPGA series Data Sheet P19 I/O Std. Leve

), unable to program flash outside the processor.Program download using the XMODEM protocol is a common practice for many products, such as Cisco's router products, Huawei's ISDN terminal products, which use the Windows-brought HyperTerminal software to transfer files without the need to install proprietary software. Simply add a break to the target board to implement the Xmodem protocol "diagram 1", it is easy to implement the program or data file download. In the following paragraphs, the impl

is reduced, the operation and service life of the entire switching system will be affected. It is very troublesome to repair the device only because of the fan. At this time, the design of a fan module that can be replaced by manually rotating two screws is very reasonable. ③ Added a USB interface to replace RS232 interface management With the development of IT technology, the USB interface standard has gradually replaced the old

equipment to adjust.2. System compositionFigure 2-1 System compositionThe system is composed of PC (including test software), test instrument, test sensor, PLC control module, sweep code gun and switch circuit. which(1) PC: running motor testing software;? Through the RS232 port: with the test instruments and other peripheral devices such as scanning gun to carry out instruction interaction, so as to achieve the control of peripheral devices and meas

You may not be familiar with this topic any more. There are a lot of online materials, because this is an important aspect of programming in Linux, and there are many people who understand this aspect; here I just want to give a brief introduction to this knowledge for beginners:To put it bluntly, serial programming connects the computer to the machine to be controlled with a serial port, and then sends specified data or controls to the lower computer through programming, or transmission, and th