Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

Why are there 4 different modes in SPI?

Status
Not open for further replies.
pawan kumar

pawan kumar

Member level 4
Joined
Jan 31, 2012
Messages
73
Helped
5
Reputation
10
Reaction score
5
Trophy points
1,298
Location
Chennai
Activity points
1,894
Hi Friends,

I couldn't give a valid reason to someone who had asked me this.

Why can't SPI be standardized to one CPOL and CPHA? having 4 different modes creates more chaos. Is there any logical reason for which these four modes exist.

Compared to SPI, other protocols like I2C, UART or CAN have their physical layer protocol well defined.
 

UART can be 8/9 bit, sync/async...
CAN have different bitrate and id lenght
There is no chaos. Only 4 possible modes. 3/4 wires connection. Pretty simple you know...
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top