Datasheet

426
11011B–ATARM–21-Feb-12
SAM3N
426
11011B–ATARM–21-Feb-12
SAM3N
26.7.46 PIO Write Protect Mode Register
Name: PIO_WPMR
Addresses: 0x400E0EE4 (PIOA), 0x400E10E4 (PIOB), 0x400E12E4 (PIOC)
Access: Read-write
Reset: See Table 26-2
For more information on Write Protection Registers, refer to Section 26.7 ”Parallel Input/Output Controller (PIO) User
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
31 30 29 28 27 26 25 24
WPKEY
23 22 21 20 19 18 17 16
WPKEY
15 14 13 12 11 10 9 8
WPKEY
76543210
———————WPEN