kozmic
12-08-2005, 08:48 PM
Hi developers,
I'm implementing a sd card on a microcontroller. I'm done with the initilization part of the card. As long as the clock frequency is 400kHz every thing is fine, but when the master goes over to data transfer mode and boosts the frequency to 25MHz my micro goes banana. It runs at only 14MHz.
IS THERE ANY WAY TO CONTROL THE CLOCK FREQUENCY OF THE SD BUS MASTER???
DO I HAVE TO WRITE MY OWN SD BUS DRIVER OR CAN THAT BE DONE FROM THE APPLICATION LAYER???
all answers are welcome
Best Regards
Michal
I'm implementing a sd card on a microcontroller. I'm done with the initilization part of the card. As long as the clock frequency is 400kHz every thing is fine, but when the master goes over to data transfer mode and boosts the frequency to 25MHz my micro goes banana. It runs at only 14MHz.
IS THERE ANY WAY TO CONTROL THE CLOCK FREQUENCY OF THE SD BUS MASTER???
DO I HAVE TO WRITE MY OWN SD BUS DRIVER OR CAN THAT BE DONE FROM THE APPLICATION LAYER???
all answers are welcome
Best Regards
Michal