Clock source selection register
CLKSRC | Clock divider source for two SD cards is supported. Each card has two bits assigned to it. For example, bit[1:0] are assigned for card 0, bit[3:2] are assigned for card 1. Card 0 maps and internally routes clock divider[0:3] outputs to cclk_out[1:0] pins, depending on bit value. 00 : Clock divider 0; 01 : Clock divider 1; 10 : Clock divider 2; 11 : Clock divider 3. |