SPECIFICATIONS

8 digital channel performance:

Maximum sampling speed: 24Msps

Input voltage range: 0~5V

Digital channels: 8

Input low level: <0.8V

Input high level: >1.4V

Supported protocols: SPI,IIC,UART,SMBus,I2S,CAN,Parallel,Custom,Search,Async,1-Wite,PS/2

logic instrument detection approach:

1. Install the software

2. Connect the logic instrument with the PC

3. Connect CH1 to CH7 with GND respectively by DuPont line. The corresponding channels after software acquisition are all at low level, which indicates that the logic instrument is normal and vice versa.

what is a logic analyzer:

Logic analyzer is 1 kind of waveform test equipment similar to oscilloscope. It collects specified signals and displays them to developers in a graphical or statistical way. Developers analyze errors in hardware or software according to protocols through these graphical timing signals. Logic analyzer is an indispensable device in the design. Through it, you can quickly locate errors, find and solve problems, and achieve twice the result with half the effort. Especially when analyzing timing, such as 1wire, I2C, UART, SPI, CAN and other data, the application of logic analyzer is very fast to solve problems.

The following is a typical example of Saleae analyzing a UART communication timing and an IIC timing: from the figure, we can clearly see that UART communication clearly shows hexadecimal number 0xA9 under baud rate 9600, while the lower IIC signal is a timing process of reading data, channel 1 is SDA, channel 2 is SCL, which is clearly displayed in channel 1, the first is to write data to the device address 0x 90 (w means write), the second indicates that the address to be read is 0x 40, the third data is to resend the device address and is read data, and the fourth byte is the read data 0xA9. Does it feel very convenient and fast.

After downloading, double-click directly to install. After installation, a shortcut will appear on the desktop:

Double-click the shortcut and the following icon will appear after entering.

After the software installation is completed, the hardware can be inserted. After the hardware is inserted, the new hardware will be automatically prompted to be found and then released

Now a dialog box

It is OK to directly "click on the automatic installation software (recommend)". after the installation, the Disconnected meeting just now

The automatic change becomes Connect, and the start simulation will automatically change to start, which is connected with the actual hardware.

Then, below we can use to measure the actual waveform, and can set the channel name in the position shown in the figure,

Sampling depth, sampling frequency and other parameters.

There are two very important parameters in the logic analyzer, namely sampling depth and sampling frequency. As you can see

In this software, there are two places where you can choose the size of the number, the first is the sampling depth, and the second is the sampling frequency

The 5M in the front represents that we have collected 5Mbit data from the beginning, and he will automatically stop collecting 5Mbit data. The 2M in the back represents that we can collect 2M bit data in 1 second. So, if we set this way, we can collect 2.5 5S of data.

The strength of saleae logic analyzer lies in that he sends the collected data to the computer in real time through USB high-speed communication, so the sampling depth depends on the memory of our computer and can reach several g, that is to say, if we set a sampling depth of 1G and a sampling frequency of 1M, then we can collect nearly 17 minutes of data and save it for slow analysis, this is very useful for everyone to analyze the data information of some chips.