Datasheet

8
6430FS–ATARM–10-Feb-12
SAM3U Series
Notes: 1. PIOA: Schmitt Trigger on all except PA14 on 100 and 144 packages.
2. PIOB: Schmitt Trigger on all except PB9 to PB16, PB25 to PB31 on 100 and 144 packages.
3. PIOC: Schmitt Trigger on all except PC20 to PC27 on 144 package.
4. TDO pin is set in input mode when the Cortex-M3 Core is not in debug mode. Thus an external pull-up (100 kΩ) must be
added to avoid current consumption due to floating input.
3.1 Design Considerations
In order to facilitate schematic capture when using a SAM3U design, Atmel provides a “Sche-
matics Checklist” Application note.
Please visit http://www.atmel.com/products/AT91/ for additional documentation.
Two-Wire Interface - TWI
TWDx TWIx Two-wire Serial Data I/O
TWCKx TWIx Two-wire Serial Clock I/O
12-bit Analog-to-Digital Converter - ADC12B
AD12Bx Analog Inputs Analog
AD12BTRG ADC Trigger Input
AD12BVREF ADC Reference Analog
10-bit Analog-to-Digital Converter - ADC
ADx Analog Inputs Analog
ADTRG ADC Trigger Input
ADVREF ADC Reference Analog
Fast Flash Programming Interface - FFPI
PGMEN0-PGMEN2 Programming Enabling Input
VDDIO
PGMM0-PGMM3 Programming Mode Input
PGMD0-PGMD15 Programming Data I/O
PGMRDY Programming Ready Output High
PGMNVALID Data Direction Output Low
PGMNOE Programming Read Input Low
PGMCK Programming Clock Input
PGMNCMD Programming Command Input Low
USB High Speed Device - UDPHS
DFSDM USB Device Full Speed Data - Analog
VDDUTMII
DFSDP USB Device Full Speed Data + Analog
DHSDM USB Device High Speed Data - Analog
DHSDP USB Device High Speed Data + Analog
Table 3-1. Signal Description List (Continued)
Signal Name Function Type
Active
Level
Voltag e
Reference Comments