ATxmega128B1 Atmel Corporation, ATxmega128B1 Datasheet - Page 391

• Manufacturer Part Number: ATxmega128B1
• Manufacturer: Atmel Corporation

Specifications of ATxmega128B1

• Flash (kbytes): 128 Kbytes
• Pin Count: 100
• Max. Operating Frequency: 32 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 16
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 53
• Ext Interrupts: 53
• Usb Transceiver: 1
• Usb Speed: Full Speed
• Usb Interface: Device
• Spi: 3
• Twi (i2c): 1
• Uart: 2
• Segment Lcd: 160
• 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
• Temp. Sensor: Yes
• Crypto Engine: AES/DES
• Sram (kbytes): 8
• 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: 3
• Output Compare Channels: 10
• Input Capture Channels: 10
• Pwm Channels: 10
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

29.11.2.3
29.11.2.4
29.11.2.5
29.11.2.6
8291A–AVR–10/11
Load Flash Page Buffer
Erase Flash Page
Write Flash Page
Flash Range CRC
The load flash page buffer command is used to load one word of data into the flash page buffer.
Repeat step 2-4 until the complete flash page buffer is loaded. Unloaded locations will have the
value 0xFFFF.
The erase flash page command is used to erase one page in the flash.
The BUSY flag in the NVM STATUS register will be set until the erase operation is finished. The
flash section busy (FBUSY) flag is set as long the flash is busy, and the application section can-
not be accessed.
The write flash page command is used to write the flash page buffer into one flash page in the
flash.
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.
The flash range CRC command can be used to verify the content in an address range in flash
after a self-programming.
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.
1. Load the NVM CMD register with the load flash page buffer command.
2. Load the Z-pointer with the word address to write.
3. Load the data word to be written into the R1:R0 registers.
4. Execute the SPM instruction. The SPM instruction is not protected when performing a
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 flash 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 flash page command.
3. Execute the SPM instruction. This requires the timed CCP sequence during self-
1. Load the NVM CMD register with the flash range CRC command.
2. Load the start byte address in the NVM address register (NVM ADDR).
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
flash page buffer load.
written to FPAGE. Other bits in the Z-pointer will be ignored during this operation.
programming.
FPAGE. Other bits in the Z-pointer will be ignored during this operation.
programming.
during self-programming.
Atmel AVR XMEGA B
391