ATxmega32A4U Atmel Corporation, ATxmega32A4U Datasheet - Page 217
ATxmega32A4U
Manufacturer Part Number
ATxmega32A4U
Description
Manufacturer
Atmel Corporation
Specifications of ATxmega32A4U
Flash (kbytes)
32 Kbytes
Pin Count
44
Max. Operating Frequency
32 MHz
Cpu
8-bit AVR
# Of Touch Channels
16
Hardware Qtouch Acquisition
No
Max I/o Pins
34
Ext Interrupts
34
Usb Transceiver
1
Usb Speed
Full Speed
Usb Interface
Device
Spi
7
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)
1024
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:
ATxmega32A4U-AU
Manufacturer:
ON
Quantity:
1 140
Part Number:
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Manufacturer:
ATMEL/爱特梅尔
Quantity:
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Part Number:
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Quantity:
20 000
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18.3
18.3.1
8331A–AVR–07/11
Register Descriptions
CTRL – Control Register
• Bit 7:3 – Reserved
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 2:0 – PRESCALER[2:0]: Clock Prescaling factor
These bits define the prescaling factor for the RTC clock according to
Table 18-1.
Bit
+0x00
Read/Write
Initial Value
PRESCALER[2:0]
000
001
010
011
100
101
110
111
R
7
–
0
Real-time counter clock prescaling factor.
R
6
–
0
Group Configuration
5
–
R
0
DIV1024
DIV256
DIV16
DIV64
DIV1
DIV2
DIV8
OFF
4
–
R
0
Atmel AVR XMEGA AU
R
3
–
0
RTC Clock Prescaling
No clock source, RTC stopped
RTC clock / 1 (no prescaling)
RTC clock / 2
RTC clock / 8
RTC clock / 16
RTC clock / 64
RTC clock / 256
RTC clock / 1024
R/W
2
0
PRESCALER[2:0]
Table 18-1 on page
R/W
1
0
R/W
0
0
CTRL
217.
217
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