ATSAM3U-EK Atmel, ATSAM3U-EK Datasheet - Page 558

• 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

31.8.1
558
558
SAM3U Series
SAM3U Series
Write Protection Registers
To prevent any single software error that may corrupt SSC behavior, certain address spaces can
be write-protected by setting the WPEN bit in the
(SSC_WPMR).
If a write access to the protected registers is detected, then the WPVS flag in the SSC Write Pro-
tect Status Register (US_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 SSC Write Protect Mode Register (SSC_WPMR) with the
appropriate access key, WPKEY.
The protected registers are:
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•
•
•
•
•
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“SSC Clock Mode Register” on page 561
“SSC Receive Clock Mode Register” on page 562
“SSC Receive Frame Mode Register” on page 564
“SSC Transmit Clock Mode Register” on page 566
“SSC Transmit Frame Mode Register” on page 568
“SSC Receive Compare 0 Register” on page 574
“SSC Receive Compare 1 Register” on page 575
“SSC Write Protect Mode Register”
6430D–ATARM–25-Mar-11
6430D–ATARM–25-Mar-11