ATxmega64A4U Atmel Corporation, ATxmega64A4U Datasheet - Page 228
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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19.3.10
19.3.11
19.3.12
19.3.13
8331A–AVR–07/11
PER1 - Period Register 1
PER2 - Period Register 2
PER3 - Period Register 3
COMP0 - Compare Register 0
After writing a byte in the PER register, the write (HW/SW) condition for setting OVFIF and the
overflow wake-up condition are disabled for the following two RTC32 clock cycles.
The COMP0, COMP1, COMP2, and COMP3 registers represents the 32-bit value, COMP.
COMP is constantly compared with the counter value (CNT). A compare match will set COMPIF
in the INTFLAGS register, and an interrupt is generated if it is enabled. COMPIF will be set on
next count after a match.
If the COMP value is higher than the PER value, no RTC compare match interrupt requests or
events will be generated.
After writing the high byte of the COMP register, the write condition for setting OVFIF and COM-
PIF, as well as the overflow and compare match wake-up condition, will be disabled for the
following two RTC32 clock cycles.
Bit
+0x08
Read/Write
Initial Value
Bit
+0x09
Read/Write
Reset Value
Bit
+0x0A
Read/Write
Reset Value
Bit
+0x0B
Read/Write
Initial Value
R/W
R/W
R/W
R/W
7
0
7
0
7
0
7
0
R/W
R/W
R/W
R/W
6
0
6
0
6
0
6
0
R/W
R/W
R/W
R/W
5
0
5
0
5
0
5
0
R/W
R/W
R/W
R/W
4
0
4
0
4
0
4
0
PER[23:16]
PER[31:24]
PER[15:8]
PER[7:0]
R/W
R/W
R/W
R/W
3
0
3
0
3
0
3
0
Atmel AVR XMEGA AU
R/W
R/W
R/W
R/W
2
0
2
0
2
0
2
0
R/W
R/W
R/W
R/W
1
0
1
0
1
0
1
0
R/W
R/W
R/W
R/W
0
0
0
0
0
0
0
0
PER0
PER1
PER2
PER3
228
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