SAM3X8E Atmel Corporation, SAM3X8E Datasheet - Page 1014

• Manufacturer Part Number: SAM3X8E
• Manufacturer: Atmel Corporation

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SAM3X/A
SAM3X/A
There are two types of Write Protect:
Both types of Write Protect can be applied independently to a particular register group by means
of the WPCMD and WPRG fields in PWM_WPCR register. If at least one Write Protect is active,
the register group is write-protected. The field WPCMD allows to perform the following actions
depending on its value:
At any time, the user can determine which Write Protect is active in which register group by the
fields WPSWS and WPHWS in the
(PWM_WPSR).
If a write access in a write-protected register is detected, then the WPVS flag in the
PWM_WPSR register is set and the field WPVSRC indicates in which register the write access
has been attempted, through its address offset without the two LSBs.
The WPVS and PWM_WPSR fields are automatically reset after reading the PWM_WPSR
register.
• Write Protect SW, which can be enabled or disabled.
• Write Protect HW, which can just be enabled, only a hardware reset of the PWM controller
• 0 = Disabling the Write Protect SW of the register groups of which the bit WPRG is at 1.
• 1 = Enabling the Write Protect SW of the register groups of which the bit WPRG is at 1.
• 2 = Enabling the Write Protect HW of the register groups of which the bit WPRG is at 1.
can disable it.
“PWM Write Protect Status Register” on page 1051
11057A–ATARM–17-Feb-12
11057A–ATARM–17-Feb-12