Why Do I See Phantom Transactions When I am Using a 7-Port USB Hub with the Beagle USB 480 Protocol Analyzer?

Question from the Customer:

I am using the Beagle USB 480 Protocol Analyzer. Normally I have no problem, but I don’t understand the readings with this setup, which includes a 7-port USB hub as shown below.

 Layout for Beagle Protocol Analyzer, USB Hub and Target Device
Figure 1: Block Diagram of the Setup with the USB Hub

The transfers with device address 05 do not seem appropriate here, as th...

Are there Specifications or Limits when Utilizing Multiple Aardvark I2C/SPI Host Adapters in One System?

Question from the Customer:

I am designing a system that will use 12 Aardvark I2C/SPI Host Adapters. Are there any specifications or limits of how many Aardvark adapters to utilize in one system?

Response from Technical Support:

Thanks for your question! Multiple Aardvark adapters can easily be connected to one computer. The only specification i...

A New Holiday Promo Tradition from Total Phase - Host Adapters, Protocol Analyzers

One of my favorite Christmas traditions is reading 'Twas the night before Christmas on Christmas Eve.  I look forward to hearing the melodic verses and envisioning the heartwarming story play out in my mind. Like Christmas carols that stick in your head, Twas the night before Christmas starts playing in my head shortly after Thanksgiving.

This ...

What are the Best Tools for Programming SPI Flash Devices that have Various Voltage Signal Levels?

Question from the Customer:

We have been using the Cheetah SPI Host Adapter with the Flash Center Software to program a Flash device in a Flash SOIC-8 Socket Board. The Flash SPI device has 3.3V voltage level signals.  As we now have 1.8V devices to work with, we are considering the Level Shifter Board (TP240610) so that 1.8V devices can be ...

USB-IF in Taiwan - our International Colleagues are Excited About Type-C Connector and our USB Power Delivery Analyzer

It’s an exciting time to be at the forefront of technology. For the USB world, the new USB Type-C connector and Power Delivery protocol sparked great interest and created a lot of energy at the recent USB-IF Plug Fest and Developer Days in Taipei, Taiwan. I was lucky enough to represent Total Phase with our CEO Gil Ben-Dov at both events. Duri...

How Do I Set up the Beagle I2C/SPI Protocol Analyzer to Communicate with Devices of Lower Signal Levels, such as 2.7V?

Question from the Customer:

I am planning to buy your Beagle I2C/SPI Protocol Analyzer. In the Beagle Protocol Analyzer User Manual, the input high voltage signal level is noted as 3.3V with +/-10% tolerance. However, on the target board, the high signal level is limited to +2.7V (the MCU is powered with 2.7V). How can the Beagle I2C/SPI Protoco...

How Can I Best Control the Bitrate of an SPI Master When I’m Working with Slower SPI Devices?

Question from the Customer:

I have been using the Aardvark I2C/SPI Host Adapter for many projects. Right now, I have a new project where I’ll be using the Aardvark adapter in SPI master mode. As I understand it, the slowest clock rate I can use in master mode is 125 kHz. However, for this project, I need a much slower bitrate, about 50 kHz. I...

How Much Impact Does the Type-C Connector Have on Your Interconnect Designs and the Market You Can Reach? How about the USB Power Delivery Analyzer?

“Given the substantial use of USB for IoT and non-IoT developments, the Type-C™ connector should have an impressive impact on interconnect designs and developments.”

The USB Type-C Connector: USB will never be the same”, Embedded Computing Design (Sept 17, 2015), written by Dr. Jerry Krasner, Ph. D., Vice President of Embedded Market ...