ATxmega64A4U Atmel Corporation, ATxmega64A4U Datasheet - Page 81
ATxmega64A4U
Manufacturer Part Number
ATxmega64A4U
Description
Manufacturer
Atmel Corporation
Specifications of ATxmega64A4U
Flash (kbytes)
64 Kbytes
Pin Count
44
Max. Operating Frequency
32 MHz
Cpu
8-bit AVR
Hardware Qtouch Acquisition
No
Max I/o Pins
34
Ext Interrupts
34
Usb Transceiver
1
Usb Speed
Full Speed
Usb Interface
Device
Spi
2
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)
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
5
Output Compare Channels
16
Input Capture Channels
16
Pwm Channels
16
32khz Rtc
Yes
Calibrated Rc Oscillator
Yes
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ATxmega64A4U-AU
Manufacturer:
ON
Quantity:
29 000
Company:
Part Number:
ATxmega64A4U-U
Manufacturer:
ATMEL
Quantity:
74
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7. System Clock and Clock Options
7.1
7.2
8331A–AVR–07/11
Features
Overview
•
•
•
•
•
•
•
•
•
XMEGA devices have a flexible clock system supporting a large number of clock sources. It
incorporates both accurate internal oscillators and external crystal oscillator and resonator sup-
port. A high-frequency 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 to remove frequency drift over voltage
and temperature. An oscillator failure monitor can be enabled to issue a non-maskable interrupt
and switch to the internal oscillator if the external oscillator or PLL fails.
When a reset occurs, all clock sources except the 32kHz ultra low power oscillator are disabled.
After reset, the device will always start up running from the 2MHz internal oscillator. During nor-
mal operation, the system clock source and prescalers can be changed from software at any
time.
Figure 7-1 on page 82
all of the clocks need to be active at a given time. The clocks for the CPU and peripherals can be
stopped using sleep modes and power reduction registers, as described in
and Sleep Modes” on page
Fast start-up time
Safe run-time clock switching
Internal oscillators:
External clock options
PLL with 20MHz - 128MHz output frequency
Clock prescalers with 1x to 2048x division
Fast peripheral clocks running at 2 and 4 times the CPU clock
Automatic run-time calibration of internal oscillators
External oscillator and PLL lock failure detection with optional non-maskable interrupt
– 32MHz run-time calibrated oscillator
– 2MHz run-time calibrated oscillator
– 32.768kHz calibrated oscillator
– 32kHz ultra low power (ULP) oscillator with 1kHz output
– 0.4MHz - 16MHz crystal oscillator
– 32.768kHz crystal oscillator
– External clock
– Internal and external clock options and 1x to 31x multiplication
– Lock detector
presents the principal clock system in the XMEGA family of devices. Not
103.
Atmel AVR XMEGA AU
”Power Management
81
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