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Trivial changes to comments.

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This commit is contained in:
Gregory Nutt 2017-03-21 15:31:53 -06:00
parent 343f7ceab2
commit 9919e33705
1 changed files with 12 additions and 7 deletions
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19
configs/xmc4500-relax/include/board.h
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@ -53,16 +53,21 @@
/* Clocking *************************************************************************/
/* Default clock initialization
* fPLL = 288MHz => fSYS = 288MHz => fCPU = 144MHz
* => fPERIPH = 144MHz
* => fCCU = 144MHz
* => fETH = 72MHz
* => fUSB = 48MHz
* => fEBU = 72MHz
*
* fXTAL = 12Mhz
* -> fPLL = (fXTAL / (2 * 1) * 48) = 288MHz
* -> fSYS = (fPLL / 1) = 288MHz
* -> fCPU = (fSYS / 2) = 144MHz
* -> fPERIPH = (fCPU / 1) = 144MHz
* -> fCCU = (fSYS / 2) = 144MHz
* -> fETH = 72MHz (REVISIT)
* -> fUSB = 48MHz (REVISIT)
* -> fEBU = 72MHz (REVISIT)
*
* fUSBPLL Disabled, only enabled if SCU_CLK_USBCLKCR_USBSEL_USBPLL is selected
*
* fOFI = 24MHz => fWDT = 24MHz
* fOFI = 24MHz
* -> fWDT = 24MHz (REVISIT)
*/
#undef BOARD_FOFI_CALIBRATION /* Enable factory calibration */