30 Jun
2012
30 Jun
'12
1:27 p.m.
On 30 Jun 2012 at 15:51, Dave McGuire wrote:
I use both regularly. SPI is inferior in some ways,
but superior in
others. I personally prefer I2C, but there are situation in which SPI
is a better choice. It is MUCH faster (I2C tops out at 400KHz, I've
seen SPI up in the several-MHz range), and I2C's transfer size is
fixed at eight bits, while SPI can transfer arbitrary word widths.
(this is handy for, say, ADCs and DACs).
Indeed, let's see you access an SDHC card using I2C at, say, 20MHz.
--Chuck