ATSAM3X4EA-AU Atmel, ATSAM3X4EA-AU Datasheet - Page 242

• 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

15.5.1
Name:
Address:
Access:
• RTPRES: Real-time Timer Prescaler Value
Defines the number of SLCK periods required to increment the Real-time timer. RTPRES is defined as follows:
RTPRES = 0: The prescaler period is equal to 2
RTPRES
• ALMIEN: Alarm Interrupt Enable
0 = The bit ALMS in RTT_SR has no effect on interrupt.
1 = The bit ALMS in RTT_SR asserts interrupt.
• RTTINCIEN: Real-time Timer Increment Interrupt Enable
0 = The bit RTTINC in RTT_SR has no effect on interrupt.
1 = The bit RTTINC in RTT_SR asserts interrupt.
• RTTRST: Real-time Timer Restart
0 = No effect.
1 = Reloads and restarts the clock divider with the new programmed value. This also resets the 32-bit counter.
242
242
31
23
15
–
–
7
SAM3X/A
SAM3X/A
Real-time Timer Mode Register
0: The prescaler period is equal to RTPRES * SCLK period.
RTT_MR
0x400E1A30
Read-write
30
22
14
–
–
6
29
21
13
–
–
5
16
* SCLK period.
28
20
12
–
–
4
RTPRES
RTPRES
27
19
11
–
–
3
RTTRST
26
18
10
–
2
RTTINCIEN
25
17
–
9
1
11057B–ATARM–28-May-12
11057B–ATARM–28-May-12
ALMIEN
24
16
–
8
0