The GoLogic™ logic analyzer connects to the PC through a USB 2.0 port. Of course, the GoLogic™ also supports USB 1.1 ports. We recommend using USB 2.0 because the download speeds are much faster.
 

Does my computer's speed restrict the GoLogic’s™ sampling rate?

No. The GoLogic™ runs independently from the host PC. All captured trace data is stored to high-speed dynamic RAM inside the GoLogic™. The data is transferred to the host PC (or laptop) after the GoLogic™ stops.

Naturally, a fast PC is more convenient for analyzing the downloaded trace data. The timing diagrams can be especially time-consuming to display on slow computers. However, even a 500 MHz Pentium III with an AGP graphics card gives excellent results.
 

How long does it take to download the GoLogic™ data via USB 2.0?

• 2M GoLogic-72 -  2.9 seconds
• 1M GoLogic-72 -  1.6 seconds
• 1M GoLogic-36 -  0.8 seconds

The above values are only provided for illustration purposes and not guaranteed. The download speeds on your PC may be slightly slower or faster. Transfers rates depend on the USB host hardware and the quality of their device drivers.

The trace size can also be limited to minimize the download time. The GoLogic™ can capture as few as 8,192 samples which downloads in about 20 milliseconds.

A USB 1.1 host port downloads the data approximately 20X slower than the above values. Obviously, we recommend using a USB 2.0 host port.
 

If the GoLogic™ loses power, is the captured data lost?

Yes, the data is lost if the GoLogic loses power. The GoLogic uses high-speed dynamic RAM. Non-volatile RAM cannot support the GoLogic's™ sampling rates.
 

How much high-speed RAM is inside the GoLogic™?

• 2M GoLogic-72  -  18 MB
• 1M GoLogic-72  -  9 MB
• 1M GoLogic-36  -  4.5 MB

• Formula = (Total samples) X (Time per sample)
• Time per sample (at 500 MHz) = 2 nanoseconds

4M samples X 2 ns = 8.388 ms
2M samples X 2 ns = 4.194 ms
1M samples X 2 ns = 2.097 ms
 

What time-span can Transitional timing analysis cover?

• Formula = (Max 32-bit "rollovers") X (Max time stamp per sample)
• The GoLogic™ program supports unlimited "rollovers" in the time-stamp counters. In other words, the 32-bit time-stamp counter can reaches its maximum value and return to zero an unlimited number of times.

Max time-stamp per sample at 125 MHz = 34.36 seconds
34.36 s X 1M samples = about 417 Days

Max time-stamp per sample at 50 MHz = 85.89 seconds
85.89 s X 1M samples = about 2.8 Years
 

How many clock inputs does the GoLogic™ offer?

The 36 and 72-channel GoLogic™ models both provide 4 channels that may be used either as data or clock inputs. When a single clock input is required, the remaining channels can be used for data inputs (i.e. - 71 data channels plus 1 clock input). When two or more clock inputs are required, all four clock inputs are reserved while the remaining channels can be used for data inputs (i.e. - 68 data channels plus 4 clock inputs).