ATSAM3S-EK Atmel, ATSAM3S-EK Datasheet - Page 442
![no-image](/images/manufacturer_photos/0/0/78/atmel_sml.jpg)
ATSAM3S-EK
Manufacturer Part Number
ATSAM3S-EK
Description
KIT EVAL FOR ATSAM3S4C
Manufacturer
Atmel
Series
SAM3Sr
Type
MCUr
Specifications of ATSAM3S-EK
Contents
Board, Cables, Power Supply
Silicon Manufacturer
Atmel
Core Architecture
ARM
Core Sub-architecture
Cortex-M3
Kit Contents
Board
Features
TFT Colour LCD Display, SD/MMC Interface
Svhc
No SVHC (15-Dec-2010)
Rohs Compliant
Yes
For Use With/related Products
*
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ATSAM3S-EK
Manufacturer:
Atmel
Quantity:
135
- Current page: 442 of 1118
- Download datasheet (24Mb)
26.15 Write Protection Registers
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 Write Protect Mode Register”
(PMC_WPMR).
If a write access to the protected registers is detected, then the WPVS flag in the PMC Write
Protect Status Register (PMC_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 PMC Write Protect Mode Register (PMC_WPMR) with the
appropriate access key, WPKEY.
The protected registers are:
“PMC System Clock Enable Register” on page 444
“PMC System Clock Disable Register” on page 445
“PMC Peripheral Clock Enable Register 0” on page 447
“PMC Peripheral Clock Disable Register 0” on page 448
“PMC Clock Generator Main Oscillator Register” on page 450
“PMC Clock Generator PLLA Register” on page 453
“PMC Clock Generator PLLB Register” on page 454
“PMC Master Clock Register” on page 455
“PMC USB Clock Register” on page 456
“PMC Programmable Clock Register” on page 457
“PMC Fast Startup Mode Register” on page 463
“PMC Fast Startup Polarity Register” on page 464
“PMC Peripheral Clock Enable Register 1” on page 468
“PMC Peripheral Clock Disable Register 1” on page 469
“PMC Oscillator Calibration Register” on page 471
SAM3S Preliminary
442
6500C–ATARM–8-Feb-11
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