SPI model is a master/slave model. There’s some SPI master which determines who gets to transmit and who gets to receive. The output from SPI master is called MOSI (Master Out Slave In). If you have 2 slaves, slave 1 and slave 2, as shown below, MOSI goes to all the slaves .Then you have another line MISO (Master In Slave Out). All the wires are connected, as shown in below image. Then you have a master only function called SCLK, which goes to all the slaves. Now also, there must be a slave select (SS) for S1 and a slave select for S2.
our company to move from LMS (Learning Management System) to EMS (EDA Management System), and finally we envision, very soon to be in DMS (Design Management System).Talking about ‘vsdflow’, it’s the main theme of this paper, and if I had to describe it in few lines, it’s a ‘plug and play (PnP)’ EDA management system, built for chip designers to implement their ideas and convert to GDSII.
A PPA card like the above, is something which every VLSI engineer should be carrying like a business card. Why? Right from RTL to synthesis to PNR to signoff, we do things like upsize, downsize, VT swap, and many more, and all these factors impacts or tweaks your design PPA in one way or the other.
Let’s take an example of ‘downsize’