ATSAM3U-EK Atmel, ATSAM3U-EK Datasheet - Page 515

• Manufacturer Part Number: ATSAM3U-EK
• Description: KIT EVAL FOR AT91SAM3U CORTEX
• Manufacturer: Atmel
• Type: MCUr

Specifications of ATSAM3U-EK

• Contents: Board
• Processor To Be Evaluated: SAM3U
• Data Bus Width: 32 bit
• Interface Type: RS-232, USB
• Operating Supply Voltage: 3 V
• Silicon Manufacturer: Atmel
• Core Architecture: ARM
• Core Sub-architecture: Cortex - M3
• Silicon Core Number: SAM3U4E
• Silicon Family Name: SAM3U
• Kit Contents: Board CD Docs
• Rohs Compliant: Yes
• For Use With/related Products: AT91SAM3U
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

30.6.1
6430D–ATARM–25-Mar-11
6430D–ATARM–25-Mar-11
Write Protection Registers
To prevent any single software error that may corrupt PIO behavior, certain address spaces can
be write-protected by setting the WPEN bit in the
(PIO_WPMR).
If a write access to the protected registers is detected, then the WPVS flag in the PIO Write Pro-
tect Status Register (PIO_WPSR) is set and the field WPVSRC indicates in which register the
write access has been attempted.
The WPVS flag is reset by writing the PIO Write Protect Mode Register (PIO_WPMR) with the
appropriate access key, WPKEY.
The protected registers are:
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“PIO Controller PIO Enable Register” on page 518
“PIO Controller PIO Disable Register” on page 518
“PIO Controller Output Enable Register” on page 519
“PIO Controller Output Disable Register” on page 520
“PIO Controller Input Filter Enable Register” on page 521
“PIO Controller Input Filter Disable Register” on page 521
“PIO Multi-driver Enable Register” on page 526
“PIO Multi-driver Disable Register” on page 527
“PIO Pull Up Disable Register” on page 528
“PIO Pull Up Enable Register” on page 528
“PIO Peripheral AB Select Register” on page 529
“PIO Output Write Enable Register” on page 532
“PIO Output Write Disable Register” on page 532
“PIO Write Protect Mode Register”
SAM3U Series
SAM3U Series
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