ATxmega256A3 Atmel Corporation, ATxmega256A3 Datasheet - Page 372

• Manufacturer Part Number: ATxmega256A3
• Manufacturer: Atmel Corporation

Specifications of ATxmega256A3

• Flash (kbytes): 256 Kbytes
• Pin Count: 64
• Max. Operating Frequency: 32 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 16
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 50
• Ext Interrupts: 50
• Usb Speed: No
• Usb Interface: No
• Spi: 10
• Twi (i2c): 2
• Uart: 7
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 16
• Adc Resolution (bits): 12
• Adc Speed (ksps): 2000
• Analog Comparators: 4
• Resistive Touch Screen: No
• Dac Channels: 2
• Dac Resolution (bits): 12
• Temp. Sensor: Yes
• Crypto Engine: AES/DES
• Sram (kbytes): 16
• Eeprom (bytes): 4096
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: Yes
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 1.6 to 3.6
• Operating Voltage (vcc): 1.6 to 3.6
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 7
• Output Compare Channels: 22
• Input Capture Channels: 22
• Pwm Channels: 22
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

30.11.2.7
30.11.2.8
30.11.2.9
8077H–AVR–12/09
Erase Application Section
Erase Application Section / Boot Loader Section Page
Application Section / Boot Loader Section Page Write
The BUSY flag in the NVM STATUS register will be set, and the CPU is halted during the execu-
tion of the command.
The CRC checksum will be available in the NVM DATA register.
In order to use the Flash Range CRC all the Boot Lock Bits must be unprogrammed (no locks).
The command execution will be aborted if the Boot Lock Bits for an accessed location are set.
The Erase Application command is used to erase the complete Application Section.
The BUSY flag in the STATUS register will be set until the operation is finished. The CPU will be
halted during the complete execution of the command.
The Erase Application Section Page Erase and Erase Boot Loader Section Page commands are
used to erase one page in the Application Section or Boot Loader Section.
The BUSY flag in the NVM STATUS register will be set until the erase operation is finished. The
FBUSY flag is set as long the Flash is Busy, and the Application section cannot be accessed.
The Write Application Section Page and Write Boot Loader Section Page commands are used to
write the Flash Page Buffer into one flash page in the Application Section or Boot Loader
Section.
The BUSY flag in the NVM STATUS register will be set until the write operation is finished. The
FBUSY flag is set as long the Flash is Busy, and the Application section cannot be accessed.
An invalid page address in the Z-pointer will abort the NVM command. The Erase Application
Section Page command requires that the Z-pointer addresses the Application section, and the
Erase Boot Section Page command requires that the Z-pointer addresses the Boot Loader
Section.
3. Load the end byte address in NVM Data Register (NVM DATA).
4. Set the CMDEX bit in the NVM CTRLA register. This requires the timed CCP sequence
1. Load the Z-pointer to point anywhere in the Application Section.
2. Load the NVM CMD register with the Erase Application Section command
3. Execute the SPM instruction. This requires the timed CCP sequence during self-
1. Load the Z-pointer with the flash page address to erase. The page address must be
2. Load the NVM CMD register with the Erase Application/Boot Section Page command.
3. Execute the SPM instruction. This requires the timed CCP sequence during self-
1. Load the Z-pointer with the flash page to write. The page address must be written to
2. Load the NVM CMD register with the Write Application Section/Boot Loader Section
3. Execute the SPM instruction. This requires the timed CCP sequence during self-
during self-programming.
programming.
written to ZPAGE. Other bits in the Z-pointer will be ignored during this operation.
programming.
PCPAGE. Other bits in the Z-pointer will be ignored during this operation.
Page command.
programming.
XMEGA A
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