ATxmega16D4 Atmel Corporation, ATxmega16D4 Datasheet - Page 55

• 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

6. System Clock and Clock options
6.1
6.2
8210B–AVR–04/10
Features
Overview
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XMEGA has a flexible clock system, supporting a large number of clock sources. It incorporates
both accurate integrated oscillators, and external crystal oscillators and resonators. A high fre-
quency Phase Locked Loop (PLL) and clock prescalers can be used to generate a wide range of
clock frequencies. A calibration feature (DFLL) is available, and can be used for automatic run-
time calibration of the internal oscillators. A Crystal Oscillator Failure Monitor can be enabled to
issue a Non-Maskable Interrupt and switch to internal oscillator if the external oscillator fails.
After reset, the device will always start up running from the 2 MHz internal oscillator. During nor-
mal operation, the System Clock source and prescalers can be changed from software at any
time.
Figure 6-1 on page 56
need to be active at a given time. The clocks to the CPU and peripherals can be stopped using
sleep modes and power reduction registers as described in
page
Fast start-up time
Safe run-time clock switching
Internal Oscillators:
External clock options
PLL with internal and external clock options with 1 to 31x multiplication
Clock Prescalers with 1 to 2048x division
Fast peripheral clock running at 2 and 4 times the CPU clock speed
Automatic Run-Time Calibration of internal oscillators
Crystal Oscillator failure detection
– 32 MHz run-time calibrated RC oscillator
– 2 MHz run-time calibrated RC oscillator
– 32.768 kHz calibrated RC oscillator
– 32 kHz Ultra Low Power (ULP) oscillator with 1 kHz output
– 0.4 - 16 MHz Crystal Oscillator
– 32.768 kHz Crystal Oscillator
– External clock
74.
presents the principal clock system in the XMEGA. All of the clocks do not
”Power Management and Sleep” on
XMEGA D
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