ATxmega64A4U Atmel Corporation, ATxmega64A4U Datasheet - Page 94
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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7.10
7.10.1
8331A–AVR–07/11
Register Description — Oscillator
CTRL – Oscillator Control Register
These bits are unused and reserved for future use. For compatibility with future devices, always
write these bits to zero when this register is written.
• Bit 4 – PLLEN: PLL Enable
Setting this bit enables the PLL. Before the PLL is enabled, it must be configured with the
desired multiplication factor and clock source.
page
• Bit 3 – XOSCEN: External Oscillator Enable
Setting this bit enables the selected external clock source. Refer to
trol Register” on page 95
clock source should be allowed time to stabilize before it is selected as the source for the system
clock.
• Bit 2 – RC32KEN: 32.768kHz Internal Oscillator Enable
Setting this bit enables the 32.768kHz internal oscillator. The oscillator must be stable before it
is selected as the source for the system clock.
page 95.
• Bit 1 – RC32MEN: 32MHz Internal Oscillator Enable
Setting this bit will enable the 32MHz internal oscillator. The oscillator must be stable before it is
selected as the source for the system clock.
95.
• Bit 0 – RC2MEN: 2MHz Internal Oscillator Enable
Setting this bit enables the 2MHz internal oscillator. The oscillator must be stable before it is
selected as the source for the system clock.
95.
By default, the 2MHz internal oscillator is enabled and this bit is set.
Bit
+0x00
Read/Write
Initial Value
• Bit 7:5 – Reserved
95..
See ”STATUS – Oscillator Status Register” on page 95.
R
7
–
0
R
6
–
0
for details on how to select the external clock source. The external
R
5
–
0
PLLEN
R/W
4
0
See ”STATUS – Oscillator Status Register” on page
See ”STATUS – Oscillator Status Register” on page
See ”STATUS – Oscillator Status Register” on
See ”STATUS – Oscillator Status Register” on
XOSCEN
R/W
Atmel AVR XMEGA AU
3
0
RC32KEN
R/W
2
0
”XOSCCTRL – XOSC Con-
RC32MEN
R/W
1
0
RC2MEN
R/W
0
1
CTRL
94
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