ATxmega128D4 Atmel Corporation, ATxmega128D4 Datasheet - Page 56

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ATxmega128D4

Manufacturer Part Number
ATxmega128D4
Description
Manufacturer
Atmel Corporation
Datasheets

Specifications of ATxmega128D4

Flash (kbytes)
128 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 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)
8
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
4
Output Compare Channels
14
Input Capture Channels
14
Pwm Channels
14
32khz Rtc
Yes
Calibrated Rc Oscillator
Yes

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6.3
6.3.1
6.3.2
8210B–AVR–04/10
Clock Distribution
System Clock - clk
CPU Clock - clk
Figure 6-1.
Figure 6-1 on page 56
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.
CPU
Brown-out
Detection
SYS
The Clock system, clock sources and clock distribution
Real Time
Counter
Watchdog
Int. ULP
32 kHz
Timer
clk
rtc
presents the principal clock distribution in the XMEGA.
32.768 kHz
Int. Osc.
Peripherals
clk
PER4
clk
PER2
clk
PER
Int. Osc.
2 MHz
RAM
System Clock Multiplexer
System Clock
Prescalers
clk
Int. Osc.
32 MHz
PLL
SYS
32.768 kHz
XTAL
AVR CPU
clk
CPU
0.4–16Mhz
XMEGA D
XTAL
Non-Volatile
Memory
External
Clock
56

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