SAM3X8C Atmel Corporation, SAM3X8C Datasheet - Page 675

• Manufacturer Part Number: SAM3X8C
• Manufacturer: Atmel Corporation

31.7.42
Name:
Address:
Access:
Reset:
For more information on Write Protection Registers, refer to
• WPEN: Write Protect Enable
0: Disables the Write Protect if WPKEY corresponds to 0x50494F (“PIO” in ASCII).
1: Enables the Write Protect if WPKEY corresponds to 0x50494F (“PIO” in ASCII).
Protects the registers:
• WPKEY: Write Protect KEY
Should be written at value 0x50494F (“PIO” in ASCII). Writing any other value in this field aborts the write operation of the
WPEN bit. Always reads as 0.
11057A–ATARM–17-Feb-12
11057A–ATARM–17-Feb-12
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“PIO Controller PIO Enable Register” on page 654
“PIO Controller PIO Disable Register” on page 654
“PIO Controller Output Enable Register” on page 655
“PIO Controller Output Disable Register” on page 656
“PIO Controller Input Filter Enable Register” on page 657
“PIO Controller Input Filter Disable Register” on page 657
“PIO Multi-driver Enable Register” on page 662
“PIO Multi-driver Disable Register” on page 663
“PIO Pull Up Disable Register” on page 664
“PIO Pull Up Enable Register” on page 664
“PIO Peripheral AB Select Register” on page 665
“PIO Output Write Enable Register” on page 668
“PIO Output Write Disable Register” on page 668
31
23
15
—
7
PIO Write Protect Mode Register
PIO_WPMR
0x400E0EE4 (PIOA), 0x400E10E4 (PIOB), 0x400E12E4 (PIOC), 0x400E14E4 (PIOD),
0x400E16E4 (PIOE), 0x400E18E4 (PIOF)
Read-write
See
Table 31-3
30
22
14
—
6
29
21
13
—
5
28
20
12
—
4
WPKEY
WPKEY
WPKEY
Section 31.6.1 ”Write Protection
27
19
11
—
3
26
18
10
—
2
Registers”.
25
17
—
9
1
SAM3X/A
SAM3X/A
WPEN
24
16
8
0
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