AT32UC3A0128AU Atmel Corporation, AT32UC3A0128AU Datasheet - Page 119
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AT32UC3A0128AU
Manufacturer Part Number
AT32UC3A0128AU
Description
Manufacturer
Atmel Corporation
Datasheets
1.AT32UC3A0128.pdf
(98 pages)
2.AT32UC3A0128.pdf
(826 pages)
3.AT32UC3A0128.pdf
(377 pages)
4.AT32UC3A0128.pdf
(33 pages)
5.AT32UC3A0128.pdf
(159 pages)
6.AT32UC3A0128AU.pdf
(2 pages)
Specifications of AT32UC3A0128AU
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
109
Ext Interrupts
109
Usb Transceiver
1
Usb Speed
Full Speed
Usb Interface
Device + OTG
Spi
6
Twi (i2c)
1
Uart
4
Ssc
1
Ethernet
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)
32
Self Program Memory
YES
External Bus Interface
1
Dram Memory
sdram
Nand Interface
No
Picopower
No
Temp. Range (deg C)
-40 to 85
I/o Supply Class
3.0-3.6 or (1.65-1.95+3.0-3.6)
Operating Voltage (vcc)
3.0-3.6 or (1.65-1.95+3.0-3.6)
Fpu
No
Mpu / Mmu
Yes / No
Timers
10
Output Compare Channels
16
Input Capture Channels
6
Pwm Channels
13
32khz Rtc
Yes
Calibrated Rc Oscillator
Yes
Available stocks
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Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
AT32UC3A0128AU-U
Manufacturer:
ATMEL
Quantity:
4
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18.5.1
Write/erase page operation
letting the CPU enter sleep mode after writing to FCMD, or by polling FSR for command com-
pletion. This polling will result in an access pattern with IDLE HSB cycles.
All the commands are protected by the same keyword, which has to be written in the eight
highest bits of the FCMD register. Writing FCMD with data that does not contain the correct
key and/or with an invalid command has no effect on the flash memory; however, the PROGE
flag is set in the Flash Status Register (FSR). This flag is automatically cleared by a read
access to the FSR register.
Writing a command to FCMD while another command is being executed has no effect on the
flash memory; however, the PROGE flag is set in the Flash Status Register (FSR). This flag is
automatically cleared by a read access to the FSR register.
If the current command writes or erases a page in a locked region, or a page protected by the
BOOTPROT fuses, the command has no effect on the flash memory; however, the LOCKE
flag is set in the FSR register. This flag is automatically cleared by a read access to the FSR
register.
Flash technology requires that an erase must be done before programming. The entire flash
can be erased by an Erase All command. Alternatively, pages can be individually erased by
the Erase Page command.
The User page can be written and erased using the mechanisms described in this chapter.
After programming, the page can be locked to prevent miscellaneous write or erase
sequences. Locking is performed on a per-region basis, so locking a region locks all pages
inside the region. Additional protection is provided for the lowermost address space of the
flash. This address space is allocated for the Boot Loader, and is protected both by the lock
bit(s) corresponding to this address space, and the BOOTPROT[2:0] fuses.
Data to be written are stored in an internal buffer called page buffer. The page buffer contains
w words. The page buffer wraps around within the internal memory area address space and
appears to be repeated by the number of pages in it. Writing of 8-bit and 16-bit data to the
page buffer is not allowed and may lead to unpredictable data corruption.
Data must be written to the page buffer before the programming command is written to the
Flash Command Register FCMD. The sequence is as follows:
Two errors can be detected in the FSR register after a programming sequence:
• Reset the page buffer with the Clear Page Buffer command.
• Fill the page buffer with the desired contents, using only 32-bit access.
• Programming starts as soon as the programming key and the programming command are
• When programming is completed, the bit FRDY in the Flash Status Register (FSR) is set. If
• Programming Error: A bad keyword and/or an invalid command have been written in the
written to the Flash Command Register. The PAGEN field in the Flash Command Register
(FCMD) must contain the address of the page to write. PAGEN is automatically updated
when writing to the page buffer, but can also be written to directly. The FRDY bit in the
Flash Status Register (FSR) is automatically cleared when the page write operation starts.
an interrupt was enabled by setting the bit FRDY in FCR, the interrupt line of the flash
controller is set.
FCMD register.
AT32UC3A
119
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