SAM3X8E Atmel Corporation, SAM3X8E Datasheet - Page 553

• Manufacturer Part Number: SAM3X8E
• Manufacturer: Atmel Corporation

28.2.14
11057A–ATARM–17-Feb-12
11057A–ATARM–17-Feb-12
Write Protection Registers
Figure 28-12. Change PLLx Programming
Figure 28-13. Programmable Clock Output Programming
To prevent any single software error that may corrupt PMC behavior, certain address spaces
can be write protected by setting the WPEN bit in the
(PMC_WPMR).
Write PMC_SCDR
Write PMC_SCER
Write PMC_PCKx
Write CKGR_PLLxR
PCKx Output
PLLx Clock
Master Clock
PCKRDY
PLLx Clock
Slow Clock
MCKRDY
LOCKx
PLL Clock is selected
PCKx is enabled
Slow Clock
“PMC Write Protect Mode Register”
PCKx is disabled
SAM3X/A
SAM3X/A
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