SAM3N0C Atmel Corporation, SAM3N0C Datasheet - Page 426

• Manufacturer Part Number: SAM3N0C
• Manufacturer: Atmel Corporation

26.7.46
Name:
Addresses: 0x400E0EE4 (PIOA), 0x400E10E4 (PIOB), 0x400E12E4 (PIOC)
Access:
Reset:
For more information on Write Protection Registers, refer to
Interface”.
• 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:
“PIO Enable Register” on page 401
“PIO Disable Register” on page 401
“PIO Output Enable Register” on page 402
“PIO Output Disable Register” on page 403
“PIO Input Filter Enable Register” on page 404
“PIO Input Filter Disable Register” on page 404
“PIO Multi-driver Enable Register” on page 409
“PIO Multi-driver Disable Register” on page 410
“PIO Pull Up Disable Register” on page 411
“PIO Pull Up Enable Register” on page 411
“PIO Peripheral ABCD Select Register 1” on page 413
“PIO Peripheral ABCD Select Register 2” on page 414
“PIO Output Write Enable Register” on page 419
“PIO Output Write Disable Register” on page 419
“PIO Pad Pull Down Disable Register” on page 417
“PIO Pad Pull Down Status Register” on page 418
426
426
31
23
15
—
7
SAM3N
SAM3N
PIO Write Protect Mode Register
PIO_WPMR
30
22
14
—
Read-write
See
6
Table 26-2
29
21
13
—
5
28
20
12
—
4
WPKEY
WPKEY
WPKEY
Section 26.7 ”Parallel Input/Output Controller (PIO) User
27
19
11
—
3
26
18
10
—
2
25
17
—
9
1
11011A–ATARM–04-Oct-10
11011A–ATARM–04-Oct-10
WPEN
24
16
8
0