Hecheng Hu wrote:
You are right it does use more H/W resource. But for some applications,
it is just a trade-off. Let's see what we can buy back with use of CF Card:
- It's paralell I/F and using roughly 1/8 clocks to read and write(compare
to serial). In the other words, the device can be put in sleep mode for
longer to save power,as well as emitting less electromagnetic noise.
Although the clk has to keep running, the cpu can be shutdown, so you
can at least got to LPM0.
- More securer connection. To remove a CF card needs for pounds of force,
not just grams. Imaging if there is damage to the device housing,
which card is more likely to stay socketed?
No argument, but my application is unlikely to experience extreme
conditions.
- Better ESD protection. Try to hold the CF card then MMC/SD card by
yourself and guess which part of the card would catch ESD spark!
Good theory, but I have not (yet) experienced such a problem.
- Less efforts to implement a file system.
There I could use some enlightenment ;)
A balance has to be made between their pros and cons if you expect
your product to operate reliably, efficaciously and safely. However,
for just playing with, it may not be the case. I play with MMC too.
Balance is the key word. Size is another issue.
Thanks,
Hecheng Hu
Thank you!
Garst
