ATxmega16D4 Atmel Corporation, ATxmega16D4 Datasheet - Page 277

• Manufacturer Part Number: ATxmega16D4
• Manufacturer: Atmel Corporation

Specifications of ATxmega16D4

• Flash (kbytes): 16 Kbytes
• Pin Count: 44
• Max. Operating Frequency: 32 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 16
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 34
• Ext Interrupts: 34
• Usb Speed: No
• Usb Interface: No
• Spi: 4
• Twi (i2c): 2
• Uart: 2
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 12
• Adc Resolution (bits): 12
• Adc Speed (ksps): 200
• Analog Comparators: 2
• Resistive Touch Screen: No
• Temp. Sensor: Yes
• Crypto Engine: No
• Sram (kbytes): 2
• Eeprom (bytes): 1024
• 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: 4
• Output Compare Channels: 14
• Input Capture Channels: 14
• Pwm Channels: 14
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

23.10.1.1
Table 23-1.
8210B–AVR–04/10
Section being addressed by Z-pointer
during the programming?
Application Section (RWW)
Boot Loader Section (NRWW)
User Signature Row section (NRWW)
Application and Boot Loader sections
Summary of RWW and NRWW functionality
The Application and Boot Loader sections are different when it comes to self-programming. The
Application Section is Read-While-Write (RWW) while the Boot Loader Section is No Read-
While-Write (NRWW). Here “Read-While-Write” refers to the section being programmed (erased
or written), not the section being read during a Boot Loader software update. Whether the CPU
can continue to run and execute code or is halted to stop program execution during a Boot
Loader software update is depending on the Flash address being programmed:
The User Signature Row section is NRWW, hence erasing or writing this section has the same
properties as for the Boot Loader Section.
During an on-going programming, the software must ensure that the Application Section is not
accessed. Doing this will halt the program execution from the CPU. The user software can not
read data located in the Application Section during a Boot Loader software operation.
• When erasing or writing a page located inside the Application Section (RWW), the Boot
• When erasing or writing a page located inside the Boot Loader Section (NRWW), the CPU is
Loader Section (NRWW) can be read during the operation, thus the CPU can run and
execute code from the Boot Loader Section (NRWW).
halted during the entire operation and code cannot execute.
Section that can be read during
programming
Boot Loader Section (NRWW)
None
None
CPU Halted
No
Yes
Yes
Read-While-Write
Supported
Yes
No
No
XMEGA D
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