V300R001 Huawei Technologies"XMS 724 Solutions HTG", // the wap Gateway of a foreign telecom operator."Wap.lizongbo.com", // The simulated header information during the test."Bytemobile", // It seems to be a solution provided to the mobile Internet to improve network operation efficiency, for example: Via = 1.1 Bytemobile OSN WebProxy/5.1};/** User-Agent keywords such as IE or Firefox on the computer */Private static String [] pcHeaders = new String [] {"Windows 98 ","Windows ME ","Windows 2000
The difference between the two lies in the manufacturing process. HMOs are used without C, and chmos are used with C. The power consumption is much smaller than the former. There is also a popular s51 single-chip microcomputer. The main difference between it and the C51 is that the program memory writing mode is different. The C51 only supports parallel writing, and the VPP burning high pressure is also required. The s51 supports ISP online program
memory series of SST; suitable for scenarios where applications need to write data online or store large volumes of non-volatile data repeatedly.
Internal function structure and external pins of the 1.1 Chip
Figure 1 shows the internal function structure of sst39sf040, it consists of super-flash storage units, row decoders, column decoders, address buffering and latches, input/output buffering, data latches, and control logic circuits. Figure 2 shows the external pin distribution, in which A18
Main features of pickit3:
1. the USB connection is stable, and there is no issue of flushing the firmware of icd2/icd2.5.2. fast download speed.3. Supports offline burning and writing. It can be used for offline burning and writing of products in batches.4. adjustable power supply output. The internal voltage can be directly controlled in mplab ide software.5. Windows 7 is supported.
Reasons for selecting pickit3:
1. Why choose pickit3 instead of icd2/icd2.5?A) stable use of pcikit3. Icd2/icd
of the reset circuit is to send a signal to the single-chip microcomputer when it is just powered on (for 51 single-chip microcomputer, it is at least two consecutive high-level machine cycles), telling the single-chip microcomputer can now start to work. As a result, the microcontroller starts from the initial state and tirelessly executes the specific program until the power is down or the program is terminated due to special circumstances. Generally, when the microcontroller works normally,
and quality needs, the outsourcing company with how many people, how to do, Huawei companies do not care, to get things done on the line. This approach may be troublesome in the early days, but the follow-up is less troublesome and replaceable is also very strong. It is also easy for Huawei to switch to an outsourcing company, even to find different outsourcing companies to make spare tyres. The first approach is component, and the second is service.
Component is the primary means of reuse. A
order. Rom is produced on the production line. Due to the high cost, it is generally used only in mass applications.
Prom
Programmable read-only memory can only be written once. If it is wrong, it has to be decommissioned. Now it is seldom used. It seems that the memory is used in the OPT single-chip microcomputer with lower costs.
EPROM
EPROM(Erasable Programmable Rom,Erasable Programmable RomThe chip can be erased and written repeatedly, solving the drawback that the PROM chip can only be wri
calculation method is as follows:
Because the signal processing must be a window, the average value of the last and current short-term Signal Peak Value VPP is used, multiply by the corresponding coefficient factor F (determined based on the actual noise environment, defined in this article between 0.1 and 0.2) as the threshold for calculating the zero-crossing rate of the current signal.
More intuitive expression in mathematics:
Therefore, the f
EPROM, and a certain programming voltage (VPP = 12-24 V, depending on the chip model ). The EPROM model starts with 27, for example, 27c020 (8*256 K) is a piece of 2 mBits capacity of the EPROM chip. After the EPROM chip writes data, it also needs to block the window with an opaque sticker or tape to avoid damage to the data caused by ultraviolet radiation. When the EPROM chip is in the blank state (after being erased with UV light), the data of each
byte.
BitB4ToB1CompositionK: KThe number of historical bytes in the range0To15.
★Interface bytesTA (I) Tb (I) Tc (I) TD (I)
☆Td (I)
BytesTD (I)Composed of two parts
BitB8ToB5CompositionY (I + 1):Each equals1Indicates the existence of the interface byte.
BB4 to B1.
☆Ta (1)
Fi:BitB8ToB5Reference of clock rate conversion factor on
Di: Reference of baud rate correction factor from BB4 to B7
☆Tb (1)
B8 is always set to 0, that is, it is not used.
I1:BitB7, B6Reference of the maximum
= 0;Dula = 1;Dula = 0;P0 = 0;Wela = 1;Wela = 0;While (1){Matrixkeyscan ();}}
Here are a few
P3 = 0xfe;Temp = P3;Temp = temp 0xf0;If (temp! = 0xf0){Delayms (10 );Temp = P3;Temp = temp 0xf0;If (temp! = 0xf0){.........
P3 = 0xfe: the first line is set to a low level, and all other lines are set to a high level.
Temp = P3 the current status value of reading the P3 port is assigned to the Temporary Variable temp
Temp = temp 0xf0 calculate temp and 0xf0, and then assign the result to temp, mainly
be used as a development programmer, supporting the entire development process from software development to hardware integration. Because the debugger system uses a device with a built-in Simulation Circuit for simulation, the code execution method is similar to that of the actual device. Users can access all available features of a given device interactively and set and modify these features through the mplab ide interface. The pickit 3 debugger is developed to simulate embedded processors wit
RST foot. As for how to calculate quantitatively, we can refer to the circuit analysis related books. Crystal circuit: Typical crystal oscillator 11.0592MHz (because it is accurate to get 9600 baud rate and 19200 baud rate for serial communication)/ 12MHz (produces accurate US-class break, convenient timing operation) special note: For 31 feet (EA/VPP), when the high-power, the microcontroller after the reset from the internal ROM 0000H start exe
MP1570A is a BER tester used by Nippon Corporation for SDH testing.Automated test scenarios and principles for 1.mp1570aarbitrary test pc--(telnet)--Test PC (TCL Interrupt)-->sig_teq_sdh.tcl--> (GPIB line)-->mp1570a chassisMP1570A's situation is unique, first of all its chassis internal software architecture uses the Visa virtual instrument software architecture. So its chassis does not have an IP address, the PC cannot be connected to the chassis via an Ethernet cable, and can only be connected
1.1GS/S refers to the sampling rate of the oscilloscope, the front s is the meaning of sample sampling, followed by S is the second, that is, the oscilloscope sampling 1G points A second, 1G is 10 of 9 square. That is, a single ad sample can be completed within 1ns.2. Transducers with high input impedance are usually selected, and the probes are divided into active and passive. The application is more passive, Probe comp is the meaning of probe compensation.3.FFT is a fast Fourier transform anal
This instruction flow applies only to T=0 protocol cards, and the data is from my bank of China debit card.61 Send Get RESPONSE command fetch data6C plus byte count, command re-sendDepending on its type, the file may be queried via file name and SFI.Any ADF (application definition file) or DDF (directory definition file) of advant can be queried by its DF (private file) name, and the DF name of the ADF corresponds to its aid, and each DF name is unique within a given card.SFI (short file identif
current unit time. Therefore, the current to a point of significance, the measurement of the current equivalent to observe this point, the current measurement must be a point of measurement, the current measurement must be the ammeter in series to the circuit used.The voltage difference between two points is nonzero when the electrical potential changes during the movement of the carrier from one point to the other. So the voltage to two points only makes sense, the measurement of the voltage m
Introduction:Based on a number of advanced technologies, the gk101 10 MHz handheld arbitrary waveform generator achieves the functions of Common Desktop instruments in a small volume. The instrument only has the palm size, achieving 80 m sampling rate, 10 MHz maximum frequency, and 10 VPP maximum output.The instrument has all-in-one wave management and output functions. Any wave of data is managed by a file system and the Protocol is open to users. Wi
The VPP protocol component provides many function interfaces for developers to call, and also provides many callback function interfaces that need to be implemented by the protocol stack. To put it bluntly, a callback function is a function pointer. The protocol stack uses a function pointer to point to the function we have registered for the callback function interface. This function is implemented by us and they call it.The following is a simple exa
Visual Paradigm for UML (VP-UML)It provides developers with the most convenient and intuitiveUML modelingFunction. In order to help Visual Paradigm for UML users get started quickly, huidu has compiledUML modeling toolsVP-UML use tutorial series, this article mainly explains how to install, next will involve UML modeling, enterprise architecture, business modeling and other aspects, welcome to exchange.
Installation of VP-UML
1,DownloadAnd run the VP-UML installer.2. Click Next To go to the Lice
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.