ATxmega16A4 Atmel Corporation, ATxmega16A4 Datasheet - Page 25

• Manufacturer Part Number: ATxmega16A4
• Manufacturer: Atmel Corporation

Specifications of ATxmega16A4

• 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: 7
• Twi (i2c): 2
• Uart: 5
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 12
• Adc Resolution (bits): 12
• Adc Speed (ksps): 2000
• Analog Comparators: 2
• Resistive Touch Screen: No
• Dac Channels: 2
• Dac Resolution (bits): 12
• Temp. Sensor: Yes
• Crypto Engine: AES/DES
• Sram (kbytes): 3.3
• 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: 5
• Output Compare Channels: 16
• Input Capture Channels: 16
• Pwm Channels: 16
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

4.14
4.15
4.15.1
4.15.2
4.15.3
8077H–AVR–12/09
IO Memory Protection
Register Description - NVM Controller
ADDR2 - Non-Volatile Memory Address Register 2
ADDR1 - Non-Volatile Memory Address Register 1
ADDR0 - Non-Volatile Memory Address Register 0
from the application software. As long as JTAG is disabled the I/O pins required for JTAG can be
used as normal I/O pins.
Some features in the device is regarded to be critical for safety in some applications. Due to this,
it is possible to lock the IO register related to the Event System and the Advanced Waveform
Extensions. As long as the lock is enabled, all related IO registers are locked and they can not
be written from the application software. The lock registers themselves are protected by the
Configuration Change Protection mechanism, for details refer to
tion” on page
The ADDR2, ADDR1 and ADDR0 registers represents the 24-bit value ADDR.
• Bit 7:0 - ADDR[23:16]: NVM Address Register Byte 2
This register gives the address extended byte when accessing application and boot section.
• Bit 7:0 - ADDR[15:8]: NVM Address Register Byte 1
This register gives the address high byte when accessing either of the memory locations.
• Bit 7:0 - ADDR[7:0]: NVM Address Register Byte 0
This register gives the address low byte when accessing either of the memory locations.
Bit
+0x02
Read/Write
Initial Value
Bit
+0x01
Read/Write
Initial Value
Bit
+0x00
Read/Write
Initial Value
12.
R/W
R/W
R/W
7
0
7
0
7
0
R/W
R/W
R/W
6
0
6
0
6
0
R/W
R/W
R/W
5
0
5
0
5
0
R/W
R/W
R/W
4
0
4
0
4
0
ADDR[23:16]
ADDR[15:8]
ADDR[7:0]
R/W
R/W
R/W
3
0
3
0
3
0
R/W
R/W
R/W
2
0
2
0
2
0
”Configuration Change Protec-
R/W
R/W
R/W
1
0
1
0
1
0
XMEGA A
R/W
R/W
R/W
0
0
0
0
0
0
ADDR2
ADDR1
ADDR0
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