Sep 10, 2012 #1 S SurekhaIris Member level 2 Joined Aug 15, 2012 Messages 50 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,286 Activity points 1,616 FOR sd card interfacing i have to set spi frequency 400KHz for that which crystal i have to be used, please suggest
FOR sd card interfacing i have to set spi frequency 400KHz for that which crystal i have to be used, please suggest
Sep 11, 2012 #2 not-a-moderator Full Member level 3 Joined Sep 5, 2011 Messages 163 Helped 46 Reputation 92 Reaction score 43 Trophy points 1,318 Location South Africa Activity points 2,263 You will find this tutorial very handy: https://www.8051projects.net/mmc-sd-interface-fat16/ They use a 22MHz crystal for the uC. The maximum attainable speed for this microcontroller using the 22Mhz crystal is 5Mhz.
You will find this tutorial very handy: https://www.8051projects.net/mmc-sd-interface-fat16/ They use a 22MHz crystal for the uC. The maximum attainable speed for this microcontroller using the 22Mhz crystal is 5Mhz.