ATSAM3X4EA-AU Atmel, ATSAM3X4EA-AU Datasheet - Page 265

• 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

16.6.13
Name:
Address:
Access:
• WPEN: Write Protect Enable
0: Disables the Write Protect if WPKEY corresponds to 0x525443 (“RTC” in ASCII).
1: Enables the Write Protect if WPKEY corresponds to 0x525443 (“RTC” in ASCII).
Protects the registers:
“RTC Mode Register” on page 254
“RTC Time Alarm Register” on page 257
“RTC Calendar Alarm Register” on page 258
11057B–ATARM–28-May-12
11057B–ATARM–28-May-12
31
23
15
—
7
RTC Write Protect Mode Register
RTC_WPMR
0x400E1B44
30
22
14
—
Read-write
6
29
21
13
—
5
28
20
12
—
4
WPKEY
WPKEY
WPKEY
27
19
11
—
3
26
18
10
—
2
25
17
—
9
1
SAM3X/A
SAM3X/A
WPEN
24
16
8
0
265
265