AT32UC3A3128(2009) View Datasheet(PDF) - Atmel Corporation
Part Name
Description
Manufacturer
AT32UC3A3128 Datasheet PDF : 961 Pages
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AT32UC3A3
Table 4-5. Signal Description List
Signal Name
HSDP
USB_VBIAS
USB_VBUS
Function
USB High Speed Data +
USB VBIAS reference
USB VBUS for OTG feature
Type
Analog
Analog
Output
Active
Level Comments
Connect to the ground through a
6810 ohms (+/- 0.5%) resistor
4.3.1
4.3.2
4.3.3
4.3.4
JTAG Pins
TMS and TDI pins have pull-up resistors. TDO pin is an output, driven at up to VDDIO, and has
no pull-up resistor.
RESET_N Pin
The RESET_N pin is a schmitt input and integrates a permanent pull-up resistor to VDDIO. As
the product integrates a power-on reset cell, the RESET_N pin can be left unconnected in case
no reset from the system needs to be applied to the product.
TWI Pins
When these pins are used for TWI, the pins are open-drain outputs with slew-rate limitation and
inputs with inputs with spike filtering. When used as GPIO pins or used for other peripherals, the
pins have the same characteristics as other GPIO pins.
GPIO Pins
All the I/O lines integrate a programmable pull-up resistor. Programming of this pull-up resistor is
performed independently for each I/O line through the I/O Controller. After reset, I/O lines default
as inputs with pull-up resistors disabled, except when indicated otherwise in the column “Reset
State” of the I/O Controller multiplexing tables.
16
32072A–AVR32–03/09
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