ATxmega64A1 Atmel Corporation, ATxmega64A1 Datasheet - Page 77
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ATxmega64A1
Manufacturer Part Number
ATxmega64A1
Description
Manufacturer
Atmel Corporation
Specifications of ATxmega64A1
Flash (kbytes)
64 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
78
Ext Interrupts
78
Usb Speed
No
Usb Interface
No
Spi
12
Twi (i2c)
4
Uart
8
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
Dac Channels
4
Dac Resolution (bits)
12
Temp. Sensor
Yes
Crypto Engine
AES/DES
Sram (kbytes)
4
Eeprom (bytes)
2048
Self Program Memory
YES
External Bus Interface
1
Dram Memory
sdram
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
8
Output Compare Channels
24
Input Capture Channels
24
Pwm Channels
24
32khz Rtc
Yes
Calibrated Rc Oscillator
Yes
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ATxmega64A1-AU
Manufacturer:
Atmel
Quantity:
135
Company:
Part Number:
ATxmega64A1U-AU
Manufacturer:
ATMEL
Quantity:
953
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Figure 7-1.
7.3
7.3.1
7.3.2
8077H–AVR–12/09
Clock Distribution
System Clock - clk
CPU Clock - clk
Brown-out
Detection
The Clock system, clock sources and clock distribution
Real Time
Counter
Figure 7-1 on page 77
The System Clock is the output from the main system clock selection. This is fed into the pres-
calers that are used to generate all internal clocks except the Asynchronous Clock.
The CPU Clock is routed to the CPU and Non-Volatile Memory. Halting the CPU Clock inhibits
the CPU from executing instructions.
Watchdog
CPU
Int. ULP
32 kHz
Timer
SYS
clk
rtc
32.768 kHz
Int. Osc.
Peripherals
clk
PER4
clk
PER2
clk
presents the principal clock distribution in the XMEGA.
PER
Int. Osc.
2 MHz
RAM
System Clock
System Clock Multiplexer
Prescalers
clk
SYS
Int. Osc.
32 MHz
PLL
32 kHz
XTAL
AVR CPU
clk
CPU
0.4-16 Mhz
XTAL
Non-Volatile
Memory
XMEGA A
External
Clock
77
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