We are running a series of MCTP commands to a slave device (address 0x3a) using the Aardvark I2C/SPI Host Adapter (address 0x70). We observed some NACKs occurred. Could you help us understand what is causing this? Looking at the SMBus specification, we believe this should not happen.

I am using the Aardvark I2C/SPI Host Adapter and Aardvark Software API to talk to various SPI devices. I am using the API examples to create sets of SPI data transactions. So far, it works for all the devices except one that requires 24-bit transactions for configuration: three 8-bit bytes with SS held low during the transaction.

Printed circuit boards (PCBs) are essential components in embedded engineering. They provide an organized platform for integrating electronic components that is used to develop various types of electronic devices. Each interconnected component on a PCB plays a critical role in determining an electronic device’s functionality and performance. In this blog, we’ll provide insight into what printed circuit boards are, their different components, different types, and what role they play in the world of embedded systems.