M
markp
Hi All,
Anyone out there know what happens when you default the CLK line of an MMC
card to low rather than high? I have an existing design that uses this
mode - it works for some MMC card manufacturers, but every now and then
it'll fail for others. Just wondering whether the MMC cards actually use the
falling edge for things (for example, they could clock the 'waiting' data
out on this edge to guarantee 5ns setup and hold to rising edge).
Mark.
Anyone out there know what happens when you default the CLK line of an MMC
card to low rather than high? I have an existing design that uses this
mode - it works for some MMC card manufacturers, but every now and then
it'll fail for others. Just wondering whether the MMC cards actually use the
falling edge for things (for example, they could clock the 'waiting' data
out on this edge to guarantee 5ns setup and hold to rising edge).
Mark.
