ATxmega64A3 Atmel Corporation, ATxmega64A3 Datasheet - Page 8

• Manufacturer Part Number: ATxmega64A3
• Manufacturer: Atmel Corporation

Specifications of ATxmega64A3

• Flash (kbytes): 64 Kbytes
• Pin Count: 64
• Max. Operating Frequency: 32 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 16
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 50
• Ext Interrupts: 50
• Usb Speed: No
• Usb Interface: No
• Spi: 10
• Twi (i2c): 2
• Uart: 7
• 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: 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: 7
• Output Compare Channels: 22
• Input Capture Channels: 22
• Pwm Channels: 22
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

3.6
8077H–AVR–12/09
Instruction Execution Timing
When an enabled interrupt occurs, the Program Counter is vectored to the actual interrupt vector
in order to execute the interrupt handling routine. Hardware clears the corresponding interrupt
flag automatically.
A flexible interrupt controller has dedicated control registers with an additional Global Interrupt
Enable bit in the Status Register. All interrupts have a separate interrupt vector, starting from the
Reset Vector at address 0 in the Program Memory. All interrupts have a programmable interrupt
level. Within each level they have priority in accordance with their interrupt vector position where
the lower interrupt vector address has the higher priority.
The AVR CPU is driven by the CPU clock clk
on page 8
vard architecture and the fast-access Register File concept. This is the basic pipelining concept
to obtain up to 1 MIPS per MHz with the corresponding unique results for functions per cost,
functions per clocks, and functions per power-unit.
Figure 3-2.
Figure 3-3 on page 8
cycle an ALU operation using two register operands is executed, and the result is stored back to
the destination register.
Figure 3-3.
Register Operands Fetch
2nd Instruction Execute
3rd Instruction Execute
ALU Operation Execute
1st Instruction Execute
2nd Instruction Fetch
3rd Instruction Fetch
4th Instruction Fetch
1st Instruction Fetch
Total Execution Time
shows the parallel instruction fetches and instruction executions enabled by the Har-
Result Write Back
The Parallel Instruction Fetches and Instruction Executions
Single Cycle ALU Operation
shows the internal timing concept for the Register File. In a single clock
clk
clk
CPU
CPU
T1
T1
CPU
. No internal clock division is used.
T2
T2
T3
T3
XMEGA A
T4
T4
Figure 3-2
8