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Minor update to some comments

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This commit is contained in:
Gregory Nutt 2015-12-19 08:11:19 -06:00
parent 37194a068e
commit 2bd187a9b0
1 changed files with 5 additions and 5 deletions
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10
configs/launchxl-tms57004/include/board.h
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@ -86,20 +86,20 @@
*
* Fpllclock = = (Fclkin / NR) x NF / OD / R
*
* For example, if the clock source is a 16MHz crystal, then
* In this case, we have:
*
* Fclkin = 16,000,000
* NR = 6 (REFCLKDIV=5)
* NF = 120 (PLLMUL = 119 * 256)
* OD = 1 (ODPLL = 0)
* R = 32 (PLLDIV=31)
* R = 2 (PLLDIV=1)
*
* Then:
*
* Fintclk = 16 MHz / 6 = 2.667 MHz
* Fintclk = 16 MHz / 6 = 2.667 MHz
* Foutputclock = 2.667 MHz * 120 = 320 MHz
* Fpostodclock = 320 MHz / 2 = 160 MHz
* Fpllclock = 160 MHz / 2 = 8 MHz
* Fpostodclock = 320 MHz / 2 = 160 MHz
* Fpllclock = 160 MHz / 2 = 80 MHz
*/
#define BOARD_PLL_NR 6 /* REFCLKDIV = 5 */