ATSAM3U-EK Atmel, ATSAM3U-EK Datasheet - Page 270

• Manufacturer Part Number: ATSAM3U-EK
• Description: KIT EVAL FOR AT91SAM3U CORTEX
• Manufacturer: Atmel
• Type: MCUr

Specifications of ATSAM3U-EK

• Contents: Board
• Processor To Be Evaluated: SAM3U
• Data Bus Width: 32 bit
• Interface Type: RS-232, USB
• Operating Supply Voltage: 3 V
• Silicon Manufacturer: Atmel
• Core Architecture: ARM
• Core Sub-architecture: Cortex - M3
• Silicon Core Number: SAM3U4E
• Silicon Family Name: SAM3U
• Kit Contents: Board CD Docs
• Rohs Compliant: Yes
• For Use With/related Products: AT91SAM3U
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

18.5.1
Name:
Address:
Access:
This register can only be written if the WPEN bit is cleared in
• UPDTIM: Update Request Time Register
0 = No effect.
1 = Stops the RTC time counting.
Time counting consists of second, minute and hour counters. Time counters can be programmed once this bit is set and
acknowledged by the bit ACKUPD of the Status Register.
• UPDCAL: Update Request Calendar Register
0 = No effect.
1 = Stops the RTC calendar counting.
Calendar counting consists of day, date, month, year and century counters. Calendar counters can be programmed once
this bit is set.
• TIMEVSEL: Time Event Selection
The event that generates the flag TIMEV in RTC_SR (Status Register) depends on the value of TIMEVSEL.
• CALEVSEL: Calendar Event Selection
The event that generates the flag CALEV in RTC_SR depends on the value of CALEVSEL
270
Value
Value
31
23
15
0
1
2
3
0
1
2
3
–
–
–
7
–
SAM3U Series
RTC Control Register
0x400E1260
RTC_CR
Read-write
Name
MINUTE
HOUR
MIDNIGHT
NOON
Name
WEEK
MONTH
YEAR
–
30
22
14
–
–
–
6
–
Description
Week change (every Monday at time 00:00:00)
Month change (every 01 of each month at time 00:00:00)
Year change (every January 1 at time 00:00:00)
Description
Minute change
Hour change
Every day at midnight
Every day at noon
29
21
13
–
–
–
5
–
28
20
12
–
–
–
4
–
“RTC Write Protect Mode Register” on page
27
19
11
–
–
–
–
3
26
18
10
–
–
–
2
–
UPDCAL
25
17
–
9
1
CALEVSEL
TIMEVSEL
6430D–ATARM–25-Mar-11
282.
UPDTIM
24
16
–
8
0