AT32UC3A464 Atmel Corporation, AT32UC3A464 Datasheet - Page 65
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AT32UC3A464
Manufacturer Part Number
AT32UC3A464
Description
Manufacturer
Atmel Corporation
Datasheets
1.AT32UC3A0128.pdf
(377 pages)
2.AT32UC3A0128.pdf
(33 pages)
3.AT32UC3A0128.pdf
(159 pages)
4.AT32UC3A3128.pdf
(91 pages)
5.AT32UC3A3128.pdf
(1012 pages)
Specifications of AT32UC3A464
Flash (kbytes)
64 Kbytes
Pin Count
100
Max. Operating Frequency
66 MHz
Cpu
32-bit AVR
Hardware Qtouch Acquisition
No
Usb Transceiver
1
Usb Speed
Hi-Speed
Usb Interface
Device + OTG
Spi
6
Twi (i2c)
2
Uart
4
Ssc
1
Sd / Emmc
2
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
8
Adc Resolution (bits)
10
Resistive Touch Screen
No
Temp. Sensor
No
Crypto Engine
No
Sram (kbytes)
128
Self Program Memory
YES
Dram Memory
No
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
Timers
6
Output Compare Channels
6
Input Capture Channels
6
32khz Rtc
Yes
Calibrated Rc Oscillator
Yes
Available stocks
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Manufacturer
Quantity
Price
Company:
Part Number:
AT32UC3A464-CIUT
Manufacturer:
ATMEL
Quantity:
180
Part Number:
AT32UC3A464-CIUT
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
Company:
Part Number:
AT32UC3A464-U
Manufacturer:
XILINX
Quantity:
1
Company:
Part Number:
AT32UC3A464S-U
Manufacturer:
ATMEL
Quantity:
551
- AT32UC3A0128 PDF datasheet
- AT32UC3A0128 PDF datasheet #2
- AT32UC3A0128 PDF datasheet #3
- AT32UC3A3128 PDF datasheet #4
- AT32UC3A3128 PDF datasheet #5
- Current page: 65 of 377
- Download datasheet (5Mb)
8.2.2
8.2.3
32000D–04/2011
Supervisor calls
Debug requests
The execution of the event routine then continues from the effective address calculated.
The rete instruction signals the end of the event. When encountered, the values in the Return
Status Register and Return Address Register corresponding to the event context are restored to
the Status Register and Program Counter. The restored Status Register contains information
allowing the core to resume operation in the previous execution mode. This concludes the event
handling.
The AVR32 instruction set provides a supervisor mode call instruction. The scall instruction is
designed so that privileged routines can be called from any context. This facilitates sharing of
code between different execution modes. The scall mechanism is designed so that a minimal
execution cycle overhead is experienced when performing supervisor routine calls from time-
critical event handlers.
The scall instruction behaves differently depending on which mode it is called from. The behav-
iour is detailed in the instruction set reference. In order to allow the scall routine to return to the
correct context, a return from supervisor call instruction, rets, is implemented.
The AVR32 architecture defines a dedicated debug mode. When a debug request is received by
the core, Debug mode is entered. Entry into Debug mode can be masked by the DM bit in the
status register. Upon entry into Debug mode, hardware sets the SR[D] bit and jumps to the
Debug Exception handler. By default, debug mode executes in the exception context, but with
dedicated Return Address Register and Return Status Register. These dedicated registers
remove the need for storing this data to the system stack, thereby improving debuggability. The
mode bits in the status register can freely be manipulated in Debug mode, to observe registers
in all contexts, while retaining full privileges.
Debug mode is exited by executing the retd instruction. This returns to the previous context.
2. When a request is accepted, the Status Register and Program Counter of the current
3. The Mode bits are set correctly to reflect the priority of the accepted event, and the cor-
sary state if other priority schemes are desired. It is the event source’s responsability to
ensure that their events are left pending until accepted by the CPU.
context is stored in the Return Status Register and Return Address Register corre-
sponding to the new context. Saving the Status Register ensures that the core is
returned to the previous execution mode when the current event handling is completed.
When exceptions occur, both the EM and GM bits are set, and the application may
manually enable nested exceptions if desired by clearing the appropriate bit. Each
exception handler has a dedicated handler address, and this address uniquely identi-
fies the exception source.
rect register file banks are selected. The address of the event handler, as shown in
Table 8-1, is loaded into the Program Counter.
AVR32
65
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