ATSAM3X4EA-AU Atmel, ATSAM3X4EA-AU Datasheet - Page 980

• 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

38.14.18 HSMCI Write Protect Mode Register
Name:
Address:
Access:
• WP_EN: Write Protection Enable
0: Disables the Write Protection if WP_KEY corresponds to 0x4D4349 (“MCI’ in ASCII).
1: Enables the Write Protection if WP_KEY corresponds to 0x4D4349 (“MCI’ in ASCII).
• WP_KEY: Write Protection Key password
Should be written at value 0x4D4349 (ASCII code for “MCI”). Writing any other value in this field has no effect.
Protects the registers:
980
980
•
•
•
•
•
•
“HSMCI Mode Register” on page 955
“HSMCI Data Timeout Register” on page 957
“HSMCI SDCard/SDIO Register” on page 958
“HSMCI Completion Signal Timeout Register” on page 964
“HSMCI DMA Configuration Register” on page 978
“HSMCI Configuration Register” on page 979
31
23
15
7
SAM3X/A
SAM3X/A
HSMCI_WPMR
0x400000E4
Read-write
30
22
14
6
29
21
13
5
WP_KEY (0x4D => “M”)
WP_KEY (0x43 => C”)
WP_KEY (0x49 => “I”)
28
20
12
4
27
19
11
3
26
18
10
2
25
17
9
1
11057B–ATARM–28-May-12
11057B–ATARM–28-May-12
WP_EN
24
16
8
0