ATSAM3X4EA-AU Atmel, ATSAM3X4EA-AU Datasheet - Page 346

• Manufacturer Part Number: ATSAM3X4EA-AU
• Description: ARM Microcontrollers - MCU QFP144,GREEN, IND TEMP, MRL A
• Manufacturer: Atmel

Specifications of ATSAM3X4EA-AU

• Rohs: yes
• Core: ARM Cortex M3
• Processor Series: SAM3X
• Data Bus Width: 32 bit
• Maximum Clock Frequency: 84 MHz
• Program Memory Size: 256 KB
• Data Ram Size: 64 KB
• On-chip Adc: Yes
• Operating Supply Voltage: 2.4 V to 3.6 V
• Operating Temperature Range: - 40 C to +85 C
• Package / Case: LQFP-144
• Mounting Style: SMD/SMT
• Factory Pack Quantity: 60

23.8.6
Name:
Address:
Access:
For more details on MATRIX_WPMR, refer to
• WPEN: Write Protect ENable
0: Disables the Write Protect if WPKEY corresponds to 0x4D4154 (“MAT” in ASCII).
1: Enables the Write Protect if WPKEY corresponds to 0x4D4154 (“MAT” in ASCII).
Protects the entire MATRIX address space from address offset 0x000 to 0x1FC.
• WPKEY: Write Protect KEY (Write-only)
Should be written at value 0x4D4154 (“MAT” in ASCII). Writing any other value in this field aborts the write operation of the
WPEN bit. Always reads as 0.
346
346
31
23
15
7
–
SAM3X/A
SAM3X/A
Write Protect Mode Register
MATRIX_WPMR
0x400E05E4
Read-write
30
22
14
6
–
29
21
13
5
–
Section 23.7 “Write Protect Registers” on page
28
20
12
4
–
WPKEY
WPKEY
WPKEY
27
19
11
3
–
26
18
10
2
–
337.
25
17
9
1
–
11057B–ATARM–28-May-12
11057B–ATARM–28-May-12
WPEN
24
16
8
0