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ATSAM3U1C

AT91SAM ARM-based Flash MCU

Atmel Corporation 

SAM3U Series

Features ..................................................................................................... 1

1 ATSAM3U4/2/1 Description ..................................................................... 2

1.1 Configuration Summary ...........................................................................................2

2 ATSAM3U4/2/1 Block Diagram ................................................................ 3

3 Signal Description .................................................................................... 5

3.1 Design Considerations ............................................................................................8

4 Package and Pinout ................................................................................. 9

4.1 SAM3U4/2/1E Package and Pinout .........................................................................9

4.2 SAM3U4/2/1C Package and Pinout ......................................................................12

5 Power Considerations ........................................................................... 15

5.1 Power Supplies ......................................................................................................15

5.2 Voltage Regulator ..................................................................................................15

5.3 Typical Powering Schematics ................................................................................15

5.4 Active Mode ...........................................................................................................19

5.5 Low Power Modes .................................................................................................19

5.6 Wake-up Sources ..................................................................................................22

5.7 Fast Start-Up .........................................................................................................23

6 Input/Output Lines ................................................................................. 24

6.1 General Purpose I/O Lines (GPIO) ........................................................................24

6.2 System I/O Lines ...................................................................................................24

6.3 Serial Wire JTAG Debug Port (SWJ-DP) ..............................................................24

6.4 Test Pin .................................................................................................................25

6.5 NRST Pin ...............................................................................................................25

6.6 NRSTB Pin ............................................................................................................25

6.7 ERASE Pin ............................................................................................................25

7 Processor and Architecture .................................................................. 26

7.1 ARM Cortex-M3 Processor ....................................................................................26

7.2 APB/AHB Bridges ..................................................................................................26

7.3 Matrix Masters .......................................................................................................26

7.4 Matrix Slaves .........................................................................................................27

7.5 Master to Slave Access .........................................................................................27

7.6 DMA Controller ......................................................................................................28

7.7 Peripheral DMA Controller .....................................................................................28

7.8 Debug and Test Features ......................................................................................29

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6430F–ATARM–21-Feb-12

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