AT32UC3A3256S Atmel Corporation, AT32UC3A3256S Datasheet - Page 13
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AT32UC3A3256S
Manufacturer Part Number
AT32UC3A3256S
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 AT32UC3A3256S
Flash (kbytes)
256 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
AES
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
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
AT32UC3A3256S-ALUT
Manufacturer:
MOLEX
Quantity:
20 000
Part Number:
AT32UC3A3256S-U
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
7.3 Customizing the ISP Configuration Word
7.3.1 Step 1: Setting the ISP_BOOT_KEY Field
7.3.2 Step 2: Setting the ISP_IO_COND_LEVEL Field
7.3.3 Step 3: Setting the ISP_IO_COND_PIN Field
7.3.4 Step 4: Setting the ISP_CRC8 Field
7.3.5 Step 5: Program the Configuration Word in the User Page
7.3.5.1 Using avr32program
7745C–AVR32–05/09
Once the ISP is activated, it establishes a USB connection with the connected PC. It may take a
few seconds because of the autobaud that is performed using the USB starts of frames to deter-
mine the frequency of the clock input on Osc0. Trying to communicate with the ISP before it is
detected by the PC OS as a USB device will fail.
The purpose of this section is to propose a method to compute the ISP Configuration Word for a
given set of (ISP_IO_COND_PIN, ISP_IO_COND_LEVEL) values (Refer to section 6.2.2 “Flash
User Page” for a description of the ISP Configuration Word stored in Flash).
As mentionned in Table 6-4. the ISP_BOOT_KEY field must always be set to 0x494F at offset
17. At this step, the configuration word is always 0x929E**** (with bit 16 unset).
As mentionned in Table 6-4. the ISP_IO_COND_LEVEL field is either high (1) or low (0) set at
bit 16 of the ISP configuration word.
For a high level condition, the ISP configuration word is always 0x929F****.
For a low level condition, the ISP configuration word is always 0x929E****.
As mentionned in Table 6-4. the ISP_IO_COND_PIN field is placed at offset 8 of the ISP config-
uration word and contains the GPIO pin number the boot process will test.
As an example, we’ll use PX16 on AT32UC3A0512 (i.e. QFP144 pin 61 so GPIO pin 88 (i.e.
0x58 in hexadecimal representation) and assume a high level condition (cf step 2): the ISP con-
figuration word is then 0x929F58**.
As mentionned in Table 6-4. the ISP_CRC8 value is the CRC of the three other Bytes of the ISP
configuration word.
Using the example from step 3, the CRC8 of 0x929F58 is 0xD2. The ISP configuration word
should then be 0x929F58D2.
There are several methods to compute a CRC8 and several resources on the web available for
t h i s
http://www.smbus.org/faq/crc8Applet.htm, fill in the “Enter hex-coded message...” field with
929F58, press the OK button, then read the “Frame Check Sequence...” field that contains the
CRC8 value (“Frame Check = 0xd2”).
•
•
Create a binary file made of one 32bit word with the value 0x929F58D2; name that binary
file e.g. isp_mycfg.bin
Issue the following command through a hardware debugger (such as the JTAG-ICE mkII or
the AVR ONE!):
avr32program program -finternal@0x80000000,512Kb -cxtal -e -v -O0x808001FC -Fbin
isp_mycfg.bin
p u r p o s e .
F o r
e x a m p l e ,
t o
u s e
t h e
j a v a
a p p l e t
o n
t h e
s i t e
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