ATxmega64A3U Atmel Corporation, ATxmega64A3U Datasheet - Page 91
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ATxmega64A3U
Manufacturer Part Number
ATxmega64A3U
Description
Manufacturer
Atmel Corporation
Specifications of ATxmega64A3U
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 Transceiver
1
Usb Speed
Full Speed
Usb Interface
Device
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
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ATxmega64A3U-AU
Manufacturer:
ACTEL
Quantity:
101
Part Number:
ATxmega64A3U-MH
Manufacturer:
TI/德州仪器
Quantity:
20 000
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8331A–AVR–07/11
• Bit 6:2 – PSADIV[4:0]: Prescaler A Division Factor
These bits define the division ratio of the clock prescaler A according to
can be written at run-time to change the frequency of the Clk
clock, Clk
Table 7-2.
• Bit 1:0 – PSBCDIV: Prescaler B and C Division Factors
These bits define the division ratio of the clock prescalers B and C according to
caler B will set the clock frequency for the Clk
will set the clock frequency for the Clk
to
Table 7-3.
Figure 7-5 on page 86
PSBCDIV[1:0]
PSADIV[4:0]
00000
00001
00011
00101
00111
01001
01011
01101
01111
10001
10101
10111
11001
11011
11101
11111
SYS
00
01
10
11
.
Prescaler B and C division factors.
Prescaler A division factor.
fore more details.
Group Configuration
Group Configuration
128
256
512
1_1
1_2
4_1
2_2
16
32
64
1
2
4
8
PER
and Clk
PER2
clock relative to the Clk
CPU
Description
No division
Divide by 2
Divide by 4
Divide by 8
Divide by 16
Divide by 32
Divide by 64
Divide by 128
Divide by 256
Divide by 512
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Prescaler B division
No division
No division
Divide by 4
Divide by 2
Atmel AVR XMEGA AU
clocks relative to the Clk
PER4
clock relative to the system
PER4
Prescaler C division
No division
Divide by 2
No division
Divide by 2
Table
clock. Prescaler C
PER2
Table
7-2. These bits
clock. Refer
7-3. Pres-
91
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