ATxmega64A3 Atmel Corporation, ATxmega64A3 Datasheet - Page 373

• Manufacturer Part Number: ATxmega64A3
• Manufacturer: Atmel Corporation

Specifications of ATxmega64A3

• Flash (kbytes): 64 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): 4
• Eeprom (bytes): 2048
• 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

30.11.2.10
30.11.2.11
30.11.2.12
30.11.2.13
8077H–AVR–12/09
Erase & Write Application Section / Boot Loader Section Page
Application Section / Boot Loader Section CRC
Erase User Signature Row
Write User Signature Row
The Erase & Write Application Section Page and Erase & Write Boot Loader Section Page com-
mands are used to erase one flash page and then write the Flash Page Buffer into that flash
page in the Application Section or Boot Loader Section, in one atomic operation.
The BUSY flag in the NVM STATUS register will be set until the 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 & Write Appli-
cation Section command requires that the Z-pointer addresses the Application section, and the
Erase & Write Boot Section Page command requires that the Z-pointer addresses the Boot
Loader Section.
The Application Section CRC and Boot Loader Section CRC commands can be used to verify
the Application Section and Boot Loader Section content after self-programming.
The BUSY flag in the NVM STATUS register will be set, and the CPU is halted during the execu-
tion of the CRC command. The CRC checksum will be available in the NVM Data registers.
The Erase User Signature Row command is used to erase the User Signature Row.
The BUSY flag in the NVM STATUS register will be set, and the CPU will be halted until the
erase operation is finished. The User Signature Row is NRWW.
The Write Signature Row command is used to write the Flash Page Buffer into the User Signa-
ture Row.
The BUSY flag in the NVM STATUS register will be set until the operation is finished, and the
CPU will be halted during the write operation. The Flash Page Buffer will be cleared during the
command execution after the write operation, but the CPU is not halted during this stage.
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 Erase & Write Application Section/Boot Loader
3. Execute the SPM instruction. This requires the timed CCP sequence during self-
1. Load the NVM CMD register with the Application Section/ Boot Load Section CRC
2. Set the CMDEX bit in the NVM CTRLA register. This requires the timed CCP sequence
1. Load the NVM CMD register with the Erase User Signature Row command.
2. Execute the SPM instruction. This requires the timed CCP sequence during self-
1. Set up the NVM CMD register to Write User Signature Row command.
2. Execute the SPM instruction. This requires the timed CCP sequence during self-
PCPAGE. Other bits in the Z-pointer will be ignored during this operation.
Section Page command.
programming.
command.
during self-programming.
programming.
programming.
XMEGA A
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