ATSAM3S4AA-MU Atmel, ATSAM3S4AA-MU Datasheet - Page 235
ATSAM3S4AA-MU
Manufacturer Part Number
ATSAM3S4AA-MU
Description
IC MCU 32BIT 256KB FLASH 48QFN
Manufacturer
Atmel
Series
SAM3Sr
Specifications of ATSAM3S4AA-MU
Core Processor
ARM® Cortex-M3™
Core Size
32-Bit
Speed
64MHz
Connectivity
I²C, MMC, SPI, SSC, UART/USART, USB
Peripherals
Brown-out Detect/Reset, DMA, I²S, POR, PWM, WDT
Number Of I /o
34
Program Memory Size
256KB (256K x 8)
Program Memory Type
FLASH
Ram Size
48K x 8
Voltage - Supply (vcc/vdd)
1.62 V ~ 1.95 V
Data Converters
A/D 8x10/12b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
48-VQFN Exposed Pad, 48-HVQFN, 48-SQFN, 48-DHVQFN
Processor Series
ATSAM3x
Core
ARM Cortex M3
3rd Party Development Tools
JTRACE-CM3, MDK-ARM, RL-ARM, ULINK2
Development Tools By Supplier
ATSAM3S-EK
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Lead Free Status / Rohs Status
Details
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
ATSAM3S4AA-MU
Manufacturer:
MICROCHIP/微芯
Quantity:
20 000
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13. Real-time Timer (RTT)
13.1
13.2
13.3
Figure 13-1. Real-time Timer
6500C–ATARM–8-Feb-11
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 16-bit
prescaler which size enables to count elapsed seconds from a 32 kHz slow clock source. It gen-
erates a periodic interrupt and/or triggers an alarm on a programmed value.
Alarm register capable to generate a wake-up of the system through the Shut Down Controller
• Real-time Timer, allowing backup of time with different accuracies
RTT_VR
– 32-bit free-running back-up counter
– Integrates a 16-bit programmable prescaler running on slow clock
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
SAM3S Preliminary
RTTINCIEN
RTT_MR
RTT_MR
ALMIEN
rtt_alarm
rtt_int
235
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