Datasheet

119
SAM9263 [DATASHEET]
Atmel-6249N-ATARM-SAM9263-Datasheet_14-Mar-16
14. Real-time Timer (RTT)
14.1 Description
The Real-time Timer is built around a 32-bit counter and used to count elapsed seconds. It generates a periodic
interrupt and/or triggers an alarm on a programmed value.
14.2 Embedded Characteristics
 Real-time Timer 32-bit free-running back-up Counter
 Integrates a 16-bit programmable prescaler running on slow clock
 Alarm Register capable of generating a wake-up of the system through the Shutdown Controller
14.3 Block Diagram
Figure 14-1. Real-time Timer
SLCK
RTPRES
RTTINC
ALMS
16-bit
Divider
32-bit
Counter
ALMV
=
CRTV
RTT_MR
RTT_VR
RTT_AR
RTT_SR
RTTINCIEN
RTT_MR
0
10
ALMIEN
rtt_int
RTT_MR
set
set
RTT_SR
read
RTT_SR
reset
reset
RTT_MR
reload
rtt_alarm
RTTRST
RTT_MR
RTTRST