topic Re: QuadSpi vs DSPI ? in Vybrid Processors

QuadSpi vs DSPI ?

HeMyFAE — Fri, 20 Sep 2013 00:09:27 GMT

CAn you use the QuadSPI interface for regular SPI communication or is this dedicated for Spi Flash only?

Re: QuadSpi vs DSPI ?

karina_valencia — Fri, 20 Sep 2013 16:52:13 GMT

juangutierrez can you help on this case?

Re: QuadSpi vs DSPI ?

juangutierrez — Mon, 23 Sep 2013 14:34:50 GMT

The QuadSPI modules is flexible enough and supports single, dual, quad and octal (2 flash devices) modes of operation.

The instruction-operand issued by the programmable sequence engine provide a 2-bit field called PINS which indicates how many lines/pads to use for the

read/write (or any other) command. The possible values are:

0x0 for Single mode,

0x1 for Dual,

0x10 for Quad and

0x11 for Octal.

You can check Section 30.5.3.1 Programmable Sequence Engine in Reference Manual for more info.

Re: QuadSpi vs DSPI ?

juangutierrez — Tue, 24 Sep 2013 17:00:32 GMT

However I think if possible is better/recommended to use one of the for SPI modules in Vybrid. The programming model in QSPI is a tied to the Program Sequence Engine who is optimized for Flash Memories. So it is possible but not recommended if you have free one of the other regular SPI blocks