SAM3SD8B Atmel Corporation, SAM3SD8B Datasheet - Page 237

• Manufacturer Part Number: SAM3SD8B
• Manufacturer: Atmel Corporation

13. Real-time Timer (RTT)
13.1
13.2
13.3
Figure 13-1. Real-time Timer
11090A–ATARM–10-Feb-12
11090A–ATARM–10-Feb-12
SLCK
RTT_MR
Description
Embedded Characteristics
Block Diagram
RTTRST
reload
Divider
16-bit
RTT_MR
RTPRES
The Real-time Timer is built around a 32-bit counter used to count roll-over events of the pro-
grammable 16-bit prescaler which enables counting elapsed seconds from a 32 kHz slow clock
source. It generates a periodic interrupt and/or triggers an alarm on a programmed value.
• 32-bit Free-running back-up counter
• Integrates a 16-bit programmable prescaler running on slow clock
• Alarm Register capable to generate a wake-up of the system through the Shut Down
Controller
RTT_VR
RTT_AR
RTT_MR
RTTRST
0
1
Counter
CRTV
32-bit
ALMV
0
RTT_SR
RTT_SR
RTT_SR
=
read
reset
reset
set
set
RTTINC
ALMS
RTTINCIEN
RTT_MR
RTT_MR
ALMIEN
SAM3S8/SD8
SAM3S8/SD8
rtt_alarm
rtt_int
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