ATSAM3U-EK Atmel, ATSAM3U-EK Datasheet - Page 495

• 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

28.14.20 PMC Write Protect Mode Register
Name:
Address:
Access:
Reset:
• WPEN: Write Protect Enable
0 = Disables the Write Protect if WPKEY corresponds to 0x504D43 (“PMC” in ASCII).
1 = Enables the Write Protect if WPKEY corresponds to 0x504D43 (“PMC” in ASCII).
Protects the registers:
• WPKEY: Write Protect KEY
Should be written at value 0x504D43 (“PMC” in ASCII). Writing any other value in this field aborts the write operation of the
WPEN bit. Always reads as 0.
6430D–ATARM–25-Mar-11
•
•
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“PMC System Clock Enable Register” on page 475
“PMC System Clock Disable Register” on page 476
“PMC Peripheral Clock Enable Register” on page 477
“PMC Peripheral Clock Disable Register” on page 478
“PMC UTMI Clock Configuration Register” on page 480
“PMC Clock Generator Main Oscillator Register” on page 481
“PMC Clock Generator PLLA Register” on page 484
“PMC Programmable Clock Register” on page 486
“PMC Fast Startup Mode Register” on page 492
“PMC Fast Startup Polarity Register” on page 493
31
23
15
7
–
PMC_WPMR
0x400E04E4
Read-write
See
Table 28-3
30
22
14
6
–
29
21
13
5
–
28
20
12
4
–
WPKEY
WPKEY
WPKEY
27
19
11
3
–
26
18
10
2
–
SAM3U Series
25
17
9
1
–
WPEN
24
16
8
0
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