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picoPower Technology
Reducing Power Consumption while Maintaining Performance
True 1.6V Operation
The 32-bit AVR UC3L family offers true 1.6V operation. All functions — including
ADC, DAC, onboard Flash and SRAM — are capable of operating down to 1.62V.
Minimized Leakage Current
The 32-bit AVR UC3L leakage current is only 100 nA retaining special purpose registers.
The leakage current with a real-time clock running is less than 1.5 μA. The real-time clock
includes a calendar mode, ensuring that clock cycles are not wasted on
calculating date and time.
Ultra Low Power 32 KHz Crystal Oscillator
The 32-bit AVR UC3L Real Time Clock consumes less than 1.5 μA while running from a 32.768 kHz crystal
oscillator.
Multiple Clock Domains
The main databus and two peripheral data buses can all be set to individual clock frequencies to ensure that
no unnecessary power is consumed. The UC3 microcontrollers also feature two crystal oscillators and dual
PLLs and DFFLs to simplify the task of selecting a suitable crystal
frequency for peripherals such as USB, UART and audio codec.
Dynamic Frequency Scaling
Dynamic Frequency Scaling (DFS) reduces power consumption
when maximum speed is not required throughout the execution of
an application. DFS makes it possible to adapt the clock frequency
on-the-fly to an application without halting program execution.
Individual Peripheral Clock Control
It is used to turn the clocks on or off dynamically for peripheral units
not in use.
High Speed I/O Interfaces
The 32-bit AVR UC3 comes with a variety of interfaces that combined with the DMA and Peripheral Event
Control creates a fast and powerful communication platform.
page 10
USART
? ASYNCHRONOUS AND SYNCHRONOUS OPERATION
? SPI MODE
? LIN MODE
? SUPPORTS IRDA
? UP TO 33 MBPS COMMUNICATION
? PERIPHERAL DMA
TWI
? I 2 C and SMBus TM compliant
? FULL 100 KHZ AND 400 KHZ SUPPORT
? MASTER AND SLAVE OPERATION
? PERIPHERAL DMA
Up to 36 PWM channels
? 8-BIT RESOLUTION
? UP TO 150 MHZ BASE CLOCK
? PERIPHERAL EVENT SYSTEM
Ethernet
? UP TO 100 MBPS COMMUNICATION
? PERIPHERAL DMA
USB On-the-Go
? HOST MODE
? UP TO 480 MBPS COMMUNICATION IN HI-SPEED MODE
? PERIPHERAL DMA
SPI
? SUPPORTS UP TO 15 EXTERNAL DEVICES
? UP TO 33 MBPS COMMUNICATION
? PERIPHERAL DMA
Synchronous Serial Controller (SSC)
? FULL DUPLEX 24-BIT I 2 S
? UP TO 33 MBPS COMMUNICATION
? PERIPHERAL DMA
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