AT32UC3A3128 Atmel Corporation, AT32UC3A3128 Datasheet - Page 7

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AT32UC3A3128

Manufacturer Part Number
AT32UC3A3128
Description
Manufacturer
Atmel Corporation

Specifications of AT32UC3A3128

Flash (kbytes)
128 Kbytes
Pin Count
144
Max. Operating Frequency
66 MHz
Cpu
32-bit AVR
# Of Touch Channels
32
Hardware Qtouch Acquisition
No
Max I/o Pins
110
Ext Interrupts
110
Usb Transceiver
1
Usb Speed
Hi-Speed
Usb Interface
Device + OTG
Spi
6
Twi (i2c)
2
Uart
4
Lin
4
Ssc
1
Sd / Emmc
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
8
Adc Resolution (bits)
10
Adc Speed (ksps)
384
Resistive Touch Screen
No
Dac Channels
2
Dac Resolution (bits)
16
Temp. Sensor
No
Crypto Engine
No
Sram (kbytes)
128
Self Program Memory
YES
External Bus Interface
1
Dram Memory
sdram
Nand Interface
Yes
Picopower
No
Temp. Range (deg C)
-40 to 85
I/o Supply Class
3.0 to 3.6
Operating Voltage (vcc)
3.0 to 3.6
Fpu
No
Mpu / Mmu
Yes / No
Timers
6
Output Compare Channels
18
Input Capture Channels
12
Pwm Channels
12
32khz Rtc
Yes
Calibrated Rc Oscillator
Yes

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2.4
2.4.1
2.4.2
2.4.3
2.4.4
32000D–04/2011
Processor States
Normal RISC State
Debug State
Java State
Secure State
The AVR32 processor supports several different execution contexts as shown in
page
Table 2-3.
Mode changes can be made under software control, or can be caused by external interrupts or
exception processing. A mode can be interrupted by a higher priority mode, but never by one
with lower priority. Nested exceptions can be supported with a minimal software overhead.
When running an operating system on the AVR32, user processes will typically execute in the
application mode. The programs executed in this mode are restricted from executing certain
instructions. Furthermore, most system registers together with the upper halfword of the status
register cannot be accessed. Protected memory areas are also not available. All other operating
modes are privileged and are collectively called System Modes. They have full access to all priv-
ileged and unprivileged resources. After a reset, the processor will be in supervisor mode.
The AVR32 can be set in a debug state, which allows implementation of software monitor rou-
tines that can read out and alter system information for use during application development. This
implies that all system and application registers, including the status registers and program
counters, are accessible in debug state. The privileged instructions are also available.
All interrupt levels are by default disabled when debug state is entered, but they can individually
be switched on by the monitor routine by clearing the respective mask bit in the status register.
Debug state can be entered as described in the Technical Reference Manual.
Debug state is exited by the retd instruction.
Some versions of the AVR32 processor core comes with a Java Extension Module (JEM). The
processor can be set in a Java State where normal RISC operations are suspended. The Java
state is described in chapter 3.
The secure state added in the AVR32 Architecture revision 3 allows executing secure or trusted
software in alongside nonsecure or untrusted software on the same processor. Hardware mech-
Priority
1
2
3
4
5
6
N/A
N/A
7.
Mode
Non Maskable Interrupt
Exception
Interrupt 3
Interrupt 2
Interrupt 1
Interrupt 0
Supervisor
Application
Overview of execution modes, their priorities and privilege levels.
Security
Privileged
Privileged
Privileged
Privileged
Privileged
Privileged
Privileged
Unprivileged
Description
Non Maskable high priority interrupt mode
Execute exceptions
General purpose interrupt mode
General purpose interrupt mode
General purpose interrupt mode
General purpose interrupt mode
Runs supervisor calls
Normal program execution mode
Table 2-3 on
AVR32
7

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